STAINLESS STEEL
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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
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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
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Metal Dusting
Metal Dusting is a hazard when using heat-treat carburizing furnaces and petrochemical equipment. Explore how high-chromium alloys thwart this destructive
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Manganese Substitution Grades of Stainless Steel
Explore the evolution of stainless steel with manganese substitution grades, offering cost-effective solutions for industries like appliances and food equipment.
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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