Proof Stress Research Articles

NUMERICAL EVALUATION OF CONCRETE FILLED STAINLESS STEEL TUBE FOR SHORT COLUMNS SUBJECTED TO AXIAL COMPRESSION LOAD

Recently, the concrete filled stainless steel tubes (CFSST) columns are widely applied in modern construction due to its aesthetic appearance, high corrosion resistant and less construction cost. The current study aims to evaluate the behavior of CFSST column with square hollow section (SHS) numerically under axial compressive load by using ABAQUS software. A good consistency had achieved between the numerical and experimental test results in terms of load-displacement behaviour and ultimate strength with a maximum difference equal to 2%. Intensive parametric studies had been conducted to determine the effects of stainless steel tubes and concrete properties on the ultimate load capacity of CFSST column. The results proved that the stainless steel tube thickness (t) capable to increase the strength of column by143.59% at t = 10 mm as compared with t = 2 mm, whereas a slight effect had observed for the variation of stainless steel proof stress ( ). On the other hand, the higher values of concrete strength (fc′) obviously reduced the lateral expansion of CFSST column at initial load and led to increase the ultimate load capacity by 34.18 % at fc′ = 80 MPa as compared with fc′ = 30 MPa. Furthermore, the design strengths calculated according to the Eurocode 4 for concrete filled steel tube (CFST) column appeared a good agreement with the numerical results within an average difference value 2.49%, hence, it could consider as the most rational design method to determine the ultimate strength of CFSST column.

Comparative study on the effect of samarium additions on thermo-mechanical behaviour of shape memory alloys

In the present work, a comparative study of the shape memory and thermo-mechanical behaviour of four alloys containing different amount of samarium have been carried out at a strain rate of 0.08 × 10-6s-1. After hot rolling, annealing and solution treatment, the alloy samples were tensile deformed at room temperature from 1% to 5% and were then recovered at 600 °C for 20 minutes repeatedly for six times to complete six training cycles. It is found that thermo-mechanical treatment (training) results in improvement of shape memory effect and has a significant influence on mechanical parameters like proof stress (σ: 0.002), critical stress (σ: 0.0008) and strain hardening exponent. The improvement in shape memory effect by thermo-mechanical treatment can be regarded as the effect of reduction in the values of proof stress and critical stress during training which facilitates the formation of ε (martensite). It has also been noticed that excessive training may result in the formation of ά (martensite) due to continuous softening of the alloy during training, thus degrading the shape memory effect. Finally, it has also been noticed that the addition of samarium increases the values of proof stress, critical stress and strain hardening exponent. Although the addition of samarium increases the values of proof stress, critical stress and strain hardening exponent yet it has not an adverse effect on shape memory effect. In this paper, the effect of thermo-mechanical treatment on mechanical parameters such as proof stress, critical stress, strain hardening exponent and their influence on shape memory effect is discussed.

Review on Extrusion of Magnesium Matrix Nano Composites

Increase in industrial requirements focusing on various research activities on composite material in a narrow region. This is being observed through replacement of material components over an existing one due to its betterment in structure behaviour and properties. In recent days, nano technology comes to play an essential part in composites and coating of material to upgradation of parameters. This work constitute the outlines and importance of extrusion process in magnesium matrix nano composites, meanwhile the effect of various factors like temperature, grain size, extrusion speed, extrusion ratio etc., on enhancing the microstructure and mechanical properties of the magnesium matrix composites. The extruded components have more excellent properties such as tensile strength, proof stress and elongation than the cast components. Addition of nano particles may lead to significant inhibition in grain boundaries resulting in refined grains after extrusion resulting in high strength of the composites. Nano particles can significantly increase the mechanical strength of magnesium matrix by effectively promoting particle hardening mechanism than micro size particles.

Mechanical Stability of Retained Austenite in Multi-Pass Cr-Ni Weld Metal in an Over-Matching Welded Joint

The mechanical stability of retained austenite in a Cr-Ni weld metal in a welded joint under a service load is related to the initial amount of retained austenite and the type of welded joint. The welded joint used is the over-matching type, i.e., the tensile strength of the weld metal is higher than that of the base metal. For this welded joint, when the initial amount is less than 7.5%, the retained austenite is stable enough to remain in the weld metal over the whole tension process. However, when the initial amount is 12–27%, the retained austenite is metastable, and a large amount of it has transformed into martensite at the applied stress level of 0.2% proof stress. At that stress level, 12% of the retained austenite is still present. As the applied strain further increases, the retained austenite continues to transform, but 7.5% of it is still available after the failure of the welded joint.

Comparison of Sn‐5Sb and Sn‐10Sb Alloys in Tensile and Fatigue Properties Using Miniature Size Specimens

Tensile and low cycle fatigue properties of Sn‐5Sb (mass%) and Sn‐10Sb (mass%) were investigated using miniature size specimens, and fracture behaviors of the specimens were observed. Tensile strength and 0.1% proof stress of both alloys decrease with increasing the temperature. The tensile strength and 0.1% proof stress of Sn‐10Sb are higher than those of Sn‐5Sb at 25°C. Elongation of Sn‐5Sb decreases with increasing the temperature except for a strain rate of 2 × 10−1 s−1, while Sn‐10Sb increases with increasing temperature. Although elongation of Sn‐10Sb is lower than that of Sn‐5Sb at 25°C, the difference between them is small at 150°C. Chisel‐point fracture was observed in both alloys regardless of conditions of the tensile test. The low cycle fatigue lives of Sn‐5Sb and Sn‐10Sb alloys obey the Manson–Coffin equation, and the fatigue ductility exponent, α, was 0.54 for Sn‐5Sb and 0.46 for Sn‐10Sb in the temperature range from 25°C to 150°C. On the basis of the observation of fractured specimens and the investigation of α, it was clarified that the crack progress can be delayed by the formation of coarse SbSn compounds in the Sn‐Sb alloy, and thus the fatigue properties can be improved.

Real weld geometry determining mechanical properties of high power laser welded medium plates

Weld width is commonly used as one of main factors to assess joint performances in laser welding. However, it changes significantly through the thickness direction in conditions of medium or thick plates. In this study, high-power autogenous laser welding was conducted on 7 mm thickness 201 stainless steel to elucidate the factor of whole weld transverse shape critically affecting the mechanical properties with the aim of predicting the performance visually through the weld appearance. The results show that single variation of welding parameters could result in great changes of weld pool figures and subsequently weld transverse shapes. All the obtained welds are composed of austenite containing small amount of cellular dendritic δ-Ferrite. The 0.2% proof stresses of Nail- and Peanut-shaped joint reach 458 MPa and 454 MPa, 88.2% and 87.5% of the base material respectively, while that of Wedge-shaped joint only comes to 371 MPa, 71.5% of the base material. The deterioration effect is believed to be caused by the axial grain zone in the weld center. The fatigue strength of joint P is a bit lower than N, but much better than W. Significant deformation incompatibility through the whole thickness and microstructure resistance to crack initiation should be responsible for the poor performance of W-shaped joints.

High-frequency linear friction welding of aluminum alloys

We developed High-Frequency Linear Friction Welding (HFLFW) operating at 250 Hz, which is larger than conventional LFW methods, to realize welding aluminum alloys. In order to establish the fundamental HFLFW process for the welding of Al alloys, the relationship between the mechanical properties and microstructure of the HFLFW joint was investigated for both 6063 and 5052 Al alloys, which have different strengthening mechanisms. Sound welds were achieved for both 6063 and 5052 Al alloys. The change in the shape of flash with increasing process time indicated that the material flow in the joint was largely affected by the material properties such as proof stress at high temperature and thermal conductivity. Further, the hardness increased and refined grains were observed at the interface of the 6063 Al alloy joints welded in the low-heat-input condition, which led to a higher joint strength at a shorter process time. The size of the refined grains was about 100nm, as observed by transmission electron microscopy. Our findings reveal that a high frequency is effective and HFLFW is a promising process for the welding of precipitation-hardening aluminum alloys with a high joint strength owing to the less heat effect during the process.

Quantitative Evaluation of Metallurgical Mechanisms Affecting Strength of Austenitic Stainless Steels

Relations predicting the mechanical properties of bars of austenitic stainless steels are already available, but no systematic work has been performed to predict the strength of cold rolled and annealed stainless steels. The tensile properties of a large number of cold rolled and annealed AISI 304 stainless steel are here correlated with their chemical composition and microstructure. Quantitative effects of various strengthening mechanisms such as grain size, δ-ferrite content and solid solution strengthening by both interstitial and substitutional solutes are described. Interstitial solutes have by far the greatest strengthening effect and, among the substitutional solutes, the ferrite-stabilizing elements have a greater effect than the austenitestabilizing elements. Regression equations are developed that predict with good accuracy the proof stress and tensile strength in AISI 304 stainless steels.

Microstructure evolution and mechanical performance of copper processed by equal channel angular rolling

Ultrafine-grained (UFG) oxygen free high conductivity (OFHC) Cu samples were processed by severe plastic deformation (SPD) using the method of equal channel angular rolling (ECAR) up to 33 passes at room temperature. It was found that the grain size gradually decreased from ~40μm to ~250nm with increasing the number of passes. A maximum dislocation density of ~21×1014m−2 was achieved after 13 passes of ECAR. For large numbers of passes (between 23 and 33), the dislocation density decreased to ~14×1014m−2. The proof stress was saturated at the value of about 400MPa. The stored energy was measured by calorimetry and compared with the values calculated from the parameters of the microstructure. The reduction of the released heat after 13 and 33 passes suggested structural relaxation of the UFG microstructure. For these numbers of passes, the reduction of area in tensile testing was improved without decreasing the proof stress. The correlation between the microstructure and the mechanical behavior was discussed in detail. It was found that ECAR is capable for the mass-production of UFG metallic materials with high strength, therefore this method is a possible way of commercialization of SPD-processed materials.

Mechanical properties of ultrafine-grained AX41 magnesium alloy at room and elevated temperatures

Mechanical properties of ultra-fine grained AX41 magnesium alloy were investigated at ambient and elevated temperatures. The study focuses on the effect of the grain size, dislocation density and crystallographic texture on the strength and formability. Commercial AX41 magnesium alloy was processed by hot extrusion followed by eight passes of equal-channel angular pressing at temperatures of 220 and 250 °C. Material was tested in tension in the direction parallel to the ECAP processing at temperatures up to 200 °C. In this temperature range, the ultra-fine grained structure is thermally stable. The strength of the material at room temperature is significantly affected by texture. In particular, basal texture component formed in ECAP samples is tilted by 40° from the processing direction and therefore facilitates plastic deformation by basal slip. In contrast, the texture of extruded material is not suitable for basal slip deformed in the same direction. The effect of texture on strength can outweigh the effect of reduced grain size and increased dislocation density in ultrafine-grained AX41 alloy. At elevated temperatures, starting from 100 °C, the deformation behaviour is controlled simultaneously by dislocation slip and grain boundary sliding (GBS). Mechanical properties of the as-cast coarse grained material are virtually independent of the temperature. On the other hand, the reduced grain size of UFG material caused the progressive decrease of the proof stress and, simultaneously, considerably improves the ductility. The study systematically shows that the effect of microstructural features on mechanical properties of coarse grained and UFG AX41 alloy strongly depends on the dominant mechanism of plastic deformation.

Effect of nitrogen on the microstructure and mechanical properties of Co-33Cr-9W alloys prepared by dental casting.

The effect of nitrogen concentration on the mechanical properties of Co-33Cr-9W alloy dental castings fabricated using the "high-Cr and high-N" concept was investigated. Microstructural analysis was performed on the alloys, and findings were discussed in relation to the mechanical properties. Owing to their high nitrogen concentrations (0.25-0.35wt%), all alloys prepared exhibited face-centered cubic (fcc) γ-phase matrices with a-few-millimeter grains consisting of dendritic substructures. Strain-induced martensitic transformations to produce hexagonal close-packed (hcp) ε-phases were not identified under tensile deformation. The precipitation of the intermetallic σ-phase was identified at the interdendritic regions where solidification segregation of Cr and W occurred. The size and chemical composition of this σ-phase did not vary with the bulk nitrogen concentration. Adding nitrogen to the alloys did not alter their tensile yield stress or Vickers hardness values significantly, suggesting that the nitrogen strengthening effect is affected by the manufacturing route as well as local chemistry that is involved in the microstructural evolution during solidification. The tensile ductility, on the other hand, increased with an increase in nitrogen concentration; the alloy with 0.35wt% nitrogen exhibited 21% elongation with a high 0.2% proof stress (589MPa). This significant improvement in ductility was likely caused by the reduction in the amount of σ-phase precipitates at the interdendritic regions following the addition of nitrogen.

Structural performance of YSt–310 cold–formed tubular steel stub columns

This paper describes experimental and numerical investigations conducted to characterize the basic material properties and design of YSt–310 cold–formed structural steel sections at Indian Institute of Technology, Guwahati. Square (SHS) and rectangular (RHS) hollow sections with minimum yield strength of 310MPa manufactured by Tata Steel India, were considered in the study. Initially, results from elemental analysis via optical emission spectrometer (OES) investigation and metallographic examination using optical microscope are presented. Key stress–strain parameters viz., Young's modulus, proof stress, ultimate strength, percentage elongation, strain hardening exponent etc. were generated based on flat, corner and weld coupon tests data. Extent of corner strength enhancement due to cold – forming determined using Vickers's microhardness test are reported. Additionally, cross – section capacity of the stub columns were also investigated experimentally and numerically. The column capacities generated from test and finite element study are compared with the existing design code – EN 1993–1–1 (EN 1993-1-1, 2005) [1] and design rules – continuous strength method (CSM) (Zhao et al., 2017) [2] and direct strength method (DSM) (North American Specifification for the Design of Cold-Formed Steel Structural Members, 2016; Arrayago et al., 2017) [3,4]. Based on the comparison, modifications on the existing design code and rules are suggested to provide a more accurate and reliable compressive design prediction.

Effects of TiB2 nanoparticle content on the microstructure and mechanical properties of aluminum matrix nanocomposites

Abstract The present work reports the fabrication of A357 alloy matrix nanocomposites reinforced with 0.5, 1.0 and 2.0 wt.-% TiB2nanoparticles (20–30 nm) by a novel method which is the combination of semi-solid mechanical mixing and ultrasonic dispersion of nanoparticles in liquid state. The microstructural and mechanical properties of the fabricated nanocomposites were investigated. The microstructural studies conducted with optical and advanced electron microscopes indicated that reasonably effective deagglomeration and uniform distribution of TiB2 nanoparticles into the matrix were achieved. Transmission electron microscopy studies also confirmed that the nanoparticles were embedded into the matrix and a good bonding was obtained between the matrix and the reinforcement. Increasing nanoparticle content led to grain refinement and significant enhancement in the mechanical properties of nanocomposites. The addition of 0.5, 1.0, and 2.0 wt.-% TiB2 nanoparticles increased the 0.2 % proof stress of matrix alloy by approximately 31, 48 and 61 %, respectively. The contribution of different mechanisms to the strength enhancement is discussed. It is proposed that the strengthening is mainly due to Orowan mechanism and dislocation generation effect by the coefficient of thermal expansion mismatch between the TiB2 nanoparticles and the matrix.

Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater

In the present paper, the corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater were studied by stress-controlled fatigue tests and a series of subsequent characterizations on the fracture surface, microstructure and secondary cracks. Results show that the corrosion fatigue crack initiation and initial propagation mechanism evolves with elevated peak stress level in simulated seawater. When peak stress is far below the proof stress, cracks preferentially initiate at the parent austenite grain boundaries (PAGBs) with 68.4% probability and at the ferrite lath boundaries (FLBs) with 31.6% probability. Meanwhile, the cracks also preferentially propagate along the PAGBs and FLBs. Upon the peak stress close to or above the proof stress, cracks turn to initiate from the emerging corrosion pits and propagate without zigzag detour but by splitting the ferrite laths which transversely block its propagation way.

The Role of Zn Additions on the Microstructure and Mechanical Properties of Mg–Nd–Zn Alloys

Mg-rare earth alloys have improved yield strength and creep resistance compared to commercial alloys such as AZ91, AM60 or AS21. The influence of Zn additions in Mg–Nd alloys on intermetallic phases and the resulting changes in the macroscopic mechanical behaviour of the materials are not yet fully understood. The aim of this work is to identify the effect of Zn additions on the nature of the intermetallic phases and on the mechanical properties in a Mg–4Nd (wt%) alloy. The addition of 8 wt% Zn to a base Mg–4Nd wt% alloy marginally improved the tensile and compression properties at room temperature or at 200 °C with the exception of the 0.2% proof stress of Mg–4Nd–8Zn alloys when tensile- or compression-tested at 200 °C. Two intermetallic phases, a quasi-binary Mg3(Zn, Nd) and ternary Mg50Nd8Zn42, have been identified by the means of electron microscopy and synchrotron diffraction. These results indicate that there are some discrepancies in the current thermodynamic calculations, suggesting an update to the databases may be required.

Design of cold-formed high strength steel tubular beams

A numerical investigation on cold-formed high strength steel (HSS) tubular beams is presented in this paper. The nominal 0.2% proof stresses of the HSS sections ranged from 700MPa to 1100MPa. In the complementary study [1], experimental investigation on the beam specimens have been performed. In the present study, numerical modelling methodology for beams was first validated and parametric study on the cold-formed HSS tubular beams was conducted. A total of 423 numerical data was obtained to investigate the structural performance of HSS tubular beams. The experimental and numerical results were then compared with the codified design guidelines from ANSI/AISC 360-10 [2], EN 1993-1-1 [3], AS 4100 [4] and AISI S100 [5] in addition to the predictions from Direct Strength Method (DSM) for square hollow sections (SHS), rectangular hollow sections (RHS) and circular hollow sections (CHS). The codified slenderness limits for sections subjected to bending were examined. Improvements on the design guidelines are proposed in this paper.

Anelasticity of die-cast magnesium-aluminium based alloys under different strain rates

Cyclic tension loading-unloading tests were conducted over a wide quasi-static strain rate range 10−6−10−1s−1 on a variety of die-cast Mg-Al based alloys, from which the deformation behaviour, especially the anelasticity, has been systematically studied. At the early stages of deformation, prior to the onset of extensive prismatic slip, the anelastic strain is less dependent on strain rate but varies between the alloys. Upon the activation of extensive prismatic slip, the anelastic strain starts to saturate at a maximum. The maximum increases with increasing strain rate and varies between alloys. The strain-rate dependence of the maximum anelastic strain can be interpreted in terms of solid solution softening/hardening of slip planes and their influence on twinning. Implications of the strain-rate dependence of anelasticity on proof stress measurement of Mg alloys are also discussed.

04.03: Buckling behaviour of axially compressed cylindrical shells made of stainless steel

ABSTRACTCylindrical shells made of stainless steels are widely used, e.g. in tanks and biogas plants [1]. Whereas austenitic stainless steels were commonly used in the past, austenitic‐ferritic and lean duplex stainless steels are more frequently used nowadays. By contrast with structural steels, stainless steels exhibit a significantly nonlinear stress‐strain behaviour which must be considered in the buckling analysis of these shells because the reduced material stiffness below the proof stress may cause premature buckling. For this reason, EN 1993‐1‐6 [2] indicates the use of either a reduced value of elastic modulus Ered or the secant modulus at the 0.2% proof stress when assessing the buckling resistance of shells with nonlinear stress‐strain curves. These provisions may produce over‐conservative low buckling strengths for stainless steel shells at both low and high slendernesses. Only stainless steel shells with medium slenderness are covered by this rule.For this reason, additional temperature‐ and slenderness‐dependent buckling strength correction factors for austenitic stainless steel axially loaded cylindrical shells were developed by Hautala and Schmidt (1999) [3,4] which were described in the ECCS Design Recommendations [5] for buckling of steel shells but are not yet implemented into EN 1993‐1‐6. Recent experimental, numerical and theoretical research, carried out within the European RFCS research project BiogaSS on austenitic‐ferritic and ferritic stainless steels has investigated the potential to apply these buckling strength correction factors to austenitic‐ferritic and ferritic stainless steels. This paper shows that shells made of austenitic‐ferritic and ferritic stainless steels have a less serious deviation from the reference mild steel than austenitic stainless steel, permitting less significant buckling strength correction factors.The results obtained for all families of stainless steels should be transformed into the generalized design verification format of EN 1993‐1‐6, in which a parameterized capacity curve [6,7] is used. This paper also shows how the correction factors devised for axially loaded shells made of austenitic stainless steel can be better represented by an appropriate characterisation using the capacity curve alone. The outcome should be relevant to austenitic, austenitic‐ferritic and ferritic stainless steels when sufficient data is available. The paper also illustrates how behaviours of considerable complexity in some shell buckling situations can still be represented by the unaltered universal capacity curve [6,8].

Effect of Applied Stress on Pitting Corrosion Behavior of Type 304 Stainless Steel in Chloride Environment

Stainless steels are widely used in structural applications due to their superior corrosion resistance. However, stainless steels sometimes suffer from pitting corrosion and stress corrosion cracking in chloride environments. It was reported that applied stress promoted pitting corrosion and changed the morphology of pitting corrosion 1. Moreover, it is known that stress corrosion cracking is often initiated at pits in stress environment 2. Elucidating the effect of applied stress on pitting corrosion behavior is important to make clear the initiation mechanisms of the stress corrosion cracking of stainless steels. As yet, however, the effect of applied stress on pitting corrosion behavior remains unclear. A commercial AISI 304 (18Cr-8Ni) austenitic stainless steel sheet was used in this study. The chemical composition is shown in mass percentages: 0.06% C, 0.39% Si, 1.11% Mn, 0.029% P, 0.0026% S, 8.02% Ni, 18.0% Cr, 0.13% Mo, 0.22% Cu, 0.002% Ti, 0.002% Al, 0.038% M, 0.003% O, Fe bal. The 0.2% proof stress of the steel was 222 MPa. This steel was heat-treated at 1373 K for 30 min and then quenched in water as solution treatment. Sensitization was conducted by annealing the steel at 923 K for 2 h and then quenching in water after the solution treatment. After these heat-treatments, the surfaces of specimens were successively polished with a diamond paste down to 1 μm. Potentiodynamic anodic polarization measurements were carried out in 0.01 M, 0.1 M, 1M, 4 M MgCl2 solution to clarify the effect of chloride concentration on pitting corrosion. All the potentials reported in this study refer to an Ag/AgCl (3.33 M KCl) electrode. The electrode areas were ca. 10 mm ×10 mm. The potential scan rate as was set at 23 mV / min. Figure 1 shows the polarization curves of the solution-treated steel under no applied stress, and the morphology of pitting corrosion after polarization. As shown in Fig. 1a, the pitting potential decreased with chloride concentration. In 0.01 and 0.1 M MgCl2 solutions, a small pit with a lacy metal cover was initiated. On the other hand, a large shallow pit was generated in 4 M MgCl2. To analyze the effect of applied stress on the pitting corrosion behavior and the morphology of pitting corrosion, micro-electrochemical measurements were utilized. As a result of preliminary experiments of solution-treated steels, pitting corrosion always occurred in 4 M MgCl2 solution when the electrode area was 1 mm × 1 mm. Therefore, experiments were conducted at the condition that the electrode area was 1 mm × 1 mm. The effect of applied stress on the pitting corrosion behavior was analyzed in 4 M MgCl2 at 298 K. During potentiodynamic anodic polarization, the potential scan was stopped after pit initiation. After that, the specimen was left at open circuit potential for 2 days under applied stress. The applied stress was 80% of 0.2% proof stress. Figure 2 shows the change of the corrosion potential with time. It was observed that the corrosion potential increased with time. From the surface observation, no crack occurred in this study. It was suggested that the effect of temperature is also the important factor affecting the initiation of the pit-induced stress corrosion cracking of austenitic stainless steels. References N. Shimahashi, I. Muto, Y. Sugawara, N. Hara, J. Electrochem. Soc., 161 (2014), C494-C500H. Masuda, Corros. Sci., 49 (2007), 120-129 Figure 1

10.37: Mechanical properties of high strength aluminium alloy at elevated temperatures

ABSTRACTThe mechanical properties of extruded aluminium alloys behave differently as temperature rises. Accurate prediction of the mechanical properties of aluminium alloys at elevated temperatures is necessary for determining the load‐carrying capacity of structures under fire conditions. This study focuses on the effects of high strength aluminium alloy 6061‐T6 at elevated temperatures. The melting point of aluminium alloy 6061‐T6 is found to be approximately 650°C. Therefore, tensile coupon tests were conducted at different temperatures ranging from approximately 24 to 600 °C for both steady and transient state tests. The material properties of aluminium alloy 6061‐T6 with plate thickness of 4.5 mm were obtained. The tests were performed using servo‐controlled hydraulic testing machine equipped with MTS 653 furnace. The Young's modulus, the yield strength (i.e. the 0.2% proof stress) and the ultimate strength versus different temperatures are also plotted and compared with the predictions from the American Aluminum Design Manual and Eurocode EN1999‐1‐2. The comparisons of the results are plotted and summarized in this paper, together with a detailed discussion. It is found that both the American Aluminum Design Manual and Eurocode generally provide conservative predictions for the high strength aluminium alloys at elevated temperatures.