17-4 Stainless Steel Bar

UNS S17400 (Grade 630)

17-4 stainless steel bar, also known as UNS S17400, 17-4 PH and Grade 630, is one of the original precipitation hardened grades developed in the 50’s. Primarily comprised of 17% chromium, 4% nickel, 4% copper, with the balance being iron. There are also trace amounts of manganese, phosphorus, sulfur, silicon, columbium (or niobium) and tantalum. Stainless Steel 17-4 PH delivers an excellent combination of oxidation and corrosion resistance. Other characteristics include high strength, toughness, and quality mechanical properties at temperatures up to 600° F. Engineers and designers frequently choose Stainless Steel 17-4 PH due to its high strength and superior corrosion resistance when compared to many other stainless steels.

Stainless Steel 17-4 PH can be forged, welded and formed. Machining may be formed in the solution-annealed state, or in the final heat treat condition. Desired mechanical properties such as ductility and strength can be achieved through heating the material at various temperatures.

Industries that use 17-4 PH include:

• Aerospace
• Chemical
• Food processing
• General metal working
• Paper industries
• Petrochemical
• Petroleum

Products partially or completely constructed of 17-4 PH include:

• Air spray guns
• Bearings
• Boat fittings
• Castings
• Dental components
• Fasteners
• Gears
• Golf club heads
• Hardware
• Load cells
• Molding dies
• Nuclear waste casks
• Precision rifle barrels
• Pressure sensor diaphragm
• Propeller shafts
• Pump impeller shafts
• Sailboat self steering systems
• Springs
• Turbine blades
• Valves