Abstract
Quench cracks were identified in the thick walled central portion of cable car wire rope clamps of complex shape. The clamps had for the first time been manufactured from the steel No. 1.6582. This problem had never occurred with the steel previously used, No. 1.5752. Metallographical examination and a comparison of the heat treatment data available for each of these steels excluded the most common causes of quench cracking, those of overheating or excessive holding at the hardening temperature, as being responsible. The most marked difference in the transformation behaviour of the two steels was however found to be in their respective martensitic transformation temperatures under the same conditions of cooling
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