LITERATURE
SPECIFICATIONS
UNS: S17400
W. NR.: 1.4548
ASTM: A 564, A 693, A 705, TYPE 630
ASME: SA 564, SA 693, SA 705, TYPE 630
AMS: 5604, 5643, 5825
NACE: MR0175
ISO: 15156
FEATURES
- High tensile strength and hardness to 600°F
- Corrosion resistant
- Excellent oxidation resistance to about 1100°F
- Creep-rupture strength to 900°F
APPLICATIONS
- Gate valves
- Chemical processing equipment
- Firearms production
- Pump shafts, gears, plungers
- Valve stems, balls, bushings, seats
- Fasteners
17-4
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 conditions H1150 and H1075.
FORMS
MARKETS & INDUSTRIES
