Explanation

The alloy spring steel that meets the requirements for some special purposes (such as high temperature, low temperature, non-magnetic, non inductive, etc.) is mostly medium alloy or high alloy steel. Generally, spring steel working above 300 ° C is called heat-resistant spring steel. W-Cr-V heat-resistant spring steel (typical steel designation 30W4Cr2V) contains many strong carbide forming elements, which significantly improves tempering stability; martensitic stainless steel 30Crl3 is used as spring steel and its working temperature can reach 400X:; precipitation hardening stainless steel 07Crl5Ni7Mo2Al is used as bullet steel and its working temperature can reach 425 ° C; While high speed steel W18Cr4V is used as spring steel and its working temperature can reach more than 500 ° C, general spring steel can work at -40 ° C, while spring steel working at lower temperature is called low temperature spring steel. For example, austenilic stainless steel Krl8Ni9 is used as spring steel and its working temperature can reach below -200t. cryogenic nickel steel and low temperature martensite aging steel with nickel content more than 5% can be used as low temperature spring steel. work hardening austenilic stainless steel with good stability can be used as non-magnetic spring steel. The stainless steel with higher strength has high corrosion resistance when used as spring steel.

Classification