Stainless Steel 17-4 PH  

Stainless Steel 17-4 PH is a martensitic precipitation-hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties at temperatures up to 600°F (316°C), good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize war page and scaling. This versatile material is widely used in the aerospace, chemical, petrochemical, food processing, paper and general metalworking industries.


Available Forms of Stainless Steel 17-4 PH:

Stainless Steel 17-4 PH is available in sheet and strip in thicknesses from 0.015" to 0.125" (0.38 to 3.18 mm) in Condition A.

Standard Heat Treatments:

As supplied from the mill in Condition A, Stainless Steel 17-4 PH can be heat treated at a variety of temperatures to develop a wide range of properties. Eight standard heat treatments have been developed.

Chemical Composition of Stainless Steel 17-4 PH:

Element Composition %
Chromium 15.00-17.50
Nickel 3.00 – 5.00
Copper 3.00 – 5.00
Carbon 0.07 max
Manganese 1.00 max
Silicon 1.00 max
Phosphorus 0.040 max
Sulphur 0.030
Columbium plus Tantalum 0.15-0.45

Carpenter Custom 630(tm)
AL 17-4(tm)
Marinox 1(tm)
CSM 21(tm)


AISI 630 ASTM A693 (630)
AMS 5604 ASTM A705 (630)
AMS 5622 MIL C-24111
AMS 5643 MIL P-47183
ASTM A564 (630) MIL S-81591
  UNS S17400


  • Principal Design Features :
    One of the most widely used precipitation hardening grades in the business.While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.

  • Applications :
    Commonly used in both aircraft and gas turbines, nuclear reactor, paper mill, oil field, and chemical process components.

  • Forms & shapes :
    Wire, Sheet, Plate, Strip, Round Bars, Hexagonal, Flats, Square, Angle, Channel, Blanks, Tubes, Billets, Pipes, Pipe Fittings, Forging Rings, Special Shape Forgings, Fasteners Etc.

Nickel & Alloy
Aluminum & Alloy
Stainless Steel
Titanium & Alloy
Copper & Alloy