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Precipitation Hardening Grades

Precipitation hardening stainless steel, like the martensitic types, can be strengthened and hardened by heat treatment. Both martensitic or austenitic precipitation hardening structures can be produced. These stainless steels combine high strength and hardness with corrosion resistance which is superior to that of the martensitic chromium stainless steels. All precipitation hardening stainless steel contains a relatively high chromium content. Most applications of precipitation hardening stainless steel plate are for corrosion resistance or oxidation resistance and retention of strength at elevated temperatures.

Product Forms

Penn Stainless stocks the following products in Precipitation Hardening Grade stainless steel:

Stainless Steel Precipitation Hardening Products
Stainless Steel Plate Plate Mill Plate More Information
Stainless Steel Sheet 2B/2D Finish. Perforated and Flat & Expanded Metal is available upon request. More Information
Stainless Steel Bar Round Bar, Square Bar, Hex Bar, Rolled Flat More Information
Stainless Steel Structural Precipitation Hardening grades are generally not produced in angles, structural tubes and other miscellaneous shapes. More Information
Stainless Steel Tubular There is some availability in 17-4PH in tubular products. Contact a sales associate for more detail. More Information

Please contact us directly with technical questions.

Common Applications

Martensitic PH steels are used in aerospace, chemical and petrochemical, and food processing applications.

Applications include:

  • Gears
  •  Valves and other engine components
  •  High strength shafts
  •  Turbine blades
  •  Moulding dies
  •  Nuclear waste casks
Advantages

Precipitation hardening stainless steels have many advantages, due to their chromium and nickel content, such as :

  • Ability to gain high strength through heat treatment
  • Corrosion resistance
  • High tensile strengths
  • Can be supplied in a “solution treated” condition, which is readily machinable
  • Can be age-hardening, so material undergoes no distortion

 

GradesDescription 
17-4PH AnnealedPenn Stainless inventory now includes Alloy 17-4 (Alloy 630, UNS S17400) in sheet, plate, round bar, and true bar. Custom 17-4PH tubular products available upon request.More Information
17-4PH H1150Penn Stainless inventory now includes Alloy 17-4 (H1150, UNS S17400) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
17-4PH H1025Penn Stainless inventory now includes Alloy 17-4 (H1025, UNS S17400) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
17-4PH H900Available upon request: Alloy 17-4 (H900, UNS S17400) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information
17-7 AlloyPenn Stainless inventory now includes 17-7PH Alloy (UNS S17700) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products.More Information