Maudlin now has the ability to obtain Heat Treated Helical Spring for Stainless Steel 17-7 condition C and reach condition CH 900. In the CH 900 heat treated condition, this alloy provides excellent mechanical properties at temperatures up to 900 degree F (482 C). In condition CH 900, the corrosion resistance is comparable to types 302 & 304 stainless steels.
The CH 900 condition requires a three step process:
- Vacuum annealed to 1750 degree F and then gas fan quenched.
- Sub-Zero step is -100 degree F, then air warmed.
- Aged to 900 degree F, then cooled.
