STAINLESS STEEL
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What Are Raw Material Surcharges?
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Quality of Microstructure of Duplex Stainless Steels
Duplex stainless steels typically have 50% of both austenite and ferrite in their microstructure. It is necessary to have good
Flat Bar or Gauered Flat Bar from Plate
Discover the difference between flat bars and gauered flat bars cut from plates. Learn about their dimensional tolerances and the
Metal Dusting
Metal Dusting is a hazard when using heat-treat carburizing furnaces and petrochemical equipment. Explore how high-chromium alloys thwart this destructive
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 H1150D.
- High tensile strength and hardness to 600°F
- Corrosion resistant
- Excellent oxidation resistance to about 1100°F
- Creep-rupture strength to 900°F
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
- Gate valves
- Chemical processing equipment
- Firearms production
- Pump shafts, gears, plungers
- Valve stems, balls, bushings, seats
- Fasteners
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