630 (UNSS17400)
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630 Precipitation Hardening Stainless Steel
Introduction
UNS S17400
Precipitation hardening stainless steel 630 (UNS S17400) , commonly called 17-4, is a kind of martensitic one
The high strength and hardness can be gained after heat treatment under low temperature. .
The corrosion resistance of 630 (UNS S17400) is similar to that of 304, and it provides moderate corrosion performance
Properties
and unusually high strength
Chemical Composition of 630 (UNS S17400) (%)
Grade C Mn Si P S Cr Ni Cu
630 min -- -- -- -- -- 15.0 3.0 3.0
max 0.07 1.00 1.00 0.04 0.03 17.5 5.0 5.0
Forging process of 630 (UNS S17400)
Preheat / ℃ heating temperature / ℃ initial forging temperature / ℃ final forging temperature / ℃ Cooling
800 1180 ~ 1200 1150 ~ 1160 ≥ 930 air-cooled
Application
630 (UNS S17400) stainless steel is mainly used for parts with requirements of high strength, weak acid resistance,such as:
plastic mold, turbine parts, shafts and so on.
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