Material selection of heat resistant spring steel

Specification for material selection and maximum service temperature heat treatment of heat resistant spring steel
Maximum service temperature of steel grade hot forming quenching temperature tempering temperature
50CrVA 300 880-900 850-870 oil 430-500
4Cr13 400 850-1050 980-1050 air cooling 540-560
Cold drawn 18-8 stainless steel wire 400, cold rolled, stress relieved and tempered at 400C, 15-60min
W18Cr4V 600 1000-1200 1280-1290 oil or air cooling 700
60Si2MnA 250 880-900 860-880 oil 350