Specification for austempering of common spring steel

Specification for austempering of common spring steel

Steel number Heating temperature Austempering temperature Isothermal holding time Hardness HRC

T10A 800+-10 250-360 10-30 40-53

65 820+-10 320-340 15-30 46-48

65Mn 820+-10 270 / 320-340 15-30 52-54 / 46-48

50CrVA 850+-10 300 30-45 52

60Si2MnA 87+-10 280 30-45 52