AISI 4140 110ksi AISI 4140 110ksi SergeyZh (Mechanical) (OP) 7 Apr 17 06:14 Hi ASME II part D has a material G41400 with 80YS/100TS. This material is listed with de-rating factors at temperatures. Can I use the same de-rating percentage but for G41400 which was hardened to 110YS/135TS RE: AISI 4140 110ksi metengr (Materials) 7 Apr 17 15:52 I would not. The effect of temperature on tensile strength properties is not the same as a tempering parameter to predict response to hardness. The values in Part D consist of actual hot tensile testing results. RE: AISI 4140 110ksi SergeyZh (Mechanical) (OP) 10 Apr 17 05:18 Thanks for reply Do you know any other standard except ASME Part D where that material (AISI 4140 110ksi ) might be listed? RE: AISI 4140 110ksi tbuelna (Aerospace) 11 Apr 17 07:01 MMPDS fig. 220.127.116.11.1 lists some data for temperature effects on tensile properties of AISI low-alloy steels.