Our 17-4 PH Stainless Steel (SS) is a precipitation hardening martensitic stainless steel. Typical usage is seen in applications requiring high strength and a modest level of corrosion resistance. Strength and toughness desired can be manipulated by temperate range in the heat treatment process. Best Stainless offers high quality standards including UNS S17400, AMS 5643, ASTM A564, and ASTM A693 Grade 630. 17-4 PH stainless steel can be used for a variety of industries including pump shafts, oil path, mechanical seals, and within the aerospace industry. Its composition is carbon, chromium, columbian + tantalum, copper, manganese, nickel, phosphorous, silicon, and sulfur. Below you will find typical applications of 17-4 PH stainless steel as well as the metals composition and mechanical properties. Learn more about our value added services that we offer to help you expedite the current job you have at hand. Stainless Steel Bar Stock Our stainless steel bar stock lengths range from the industry standard 12' to 28' long. For projects requiring long length stainless steel bar, our inventory ranges from 20’-28’ R/L. Click here to view a full list of stainless steel bar stock.

17-4 PH Stainless Steel Properties

ConditionUltimate Tensile
Strength (PSI)
0.2% Yield
Strength (PSI)
(% in 2in.)
Reduction Of
Area (%)
H1150-D125,000105,0001650255 min-
311 max

17-4 PH Stainless Steel Applications

  • Pump Shafts
  • Oil Patch
  • Mechanical Seals
  • Aerospace

17-4 PH Stainless Steel Stock Shapes

  • Pump Shafts
  • Round Bar
  • Square Bar
  • Boat Shaft
  • Flat Bar
  • Hex Bar

17-4 PH Stainless Steel Composition

  • Carbon 0.070 max
  • Chromium 15.00 - 17.50
  • Columbian + Tantalum 0.15 - 0.45
  • Copper 3.00 - 5.00
  • Manganese1.00 max
  • Nickel 3.00 - 5.00
  • Phosphorus 0.040 max
  • Silicon 1.00 max
  • Sulfur 0.030 max

17-4PH Industry Standards

  • UNS S17400
  • AMS 5643
  • ASTM A564
  • ASTM A693 Grade 630
  • NACE MR0175/MR0103 (H-1150D Condition)