SPEC SHEET

17-4 stainless is an age-hardening martensitic stainless combining high strength with the corrosion resistance of stainless steel. Hardening is achieved by a short-time, simple low-temperature treatment. Unlike conventional martensitic stainless steels, such as type 410, 17-4 is quite weldable. The strength, corrosion resistance and simplified fabrication can make 17-4 stainless a cost-effective replacement for high strength carbon steels as well as other stainless grades.
At the solution treating temperature, 1900°F, the metal is austenitic but undergoes transformation to a low-carbon martensitic structure during cooling to room temperature. This transformation is not complete until the temperature drops to 90°F. Subsequent heating to temperatures of 900-1150°F for one to four hours precipitation strengthens the alloy. This hardening treatment also tempers the martensitic structure, increasing ductility and toughness.
Rolled Alloys stocks 17-4 in condition "A", and also stocks material in the hardened condition H1150 and HH1150.
 

Chemical Composition, %

Specifications

UNS: S17400 W. Nr./EN: 1.4548 ASTM: A 693, A 564, A 705, Type 630 AMS: 5604, 5643, 5825
ASME: SA 693, SA 564, SA 705, Type 630 NACE: MR0175 ISO: 15156-3

Common Trade Names

17-4 Stainless