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17-4PH Stainless Steel Sheet, Coil and Plate – AMS 5604, UNS S17400

17-4 PH is a martensitic, chromium-nickel-copper precipitation-hardening stainless steel. 17-4 PH stainless steel is capable of attaining a wide range of strength and toughness properties depending on the precipitation or aging temperature used in hardening.  Its valuable combination of  high strength, good corrosion resistance and toughness in both base metals and welds gives designers opportunities to add reliability to their products while simplifying fabrication and often reducing costs. High strength is maintained to approximately 600°F (316°C). This material has good resistance to stress corrosion cracking in the lower strength conditions.

17-4PH Chemical Composition

 
Element Percent By Weight
Type 17-4ph
C Carbon 0.07 maximum
Mn Manganese 1.00 maximum
P Phosphorus 0.04 maximum
S Sulfur 0.03 maximum
Si Silicon 1.00 maximum
Cr Chromium 15.00 – 17.50
Ni Nickel 3.00 – 5.00
Cu Copper 3.00 – 5.00
Nb
Ta		 Columbium
plus Tantalum		 0.15 – 0.45

Common Applications of 17-4 PH Stainless Steel

  • Aerospace applications
  • Fasteners
  • Base plates
  • Chemical processing equipment
  • Oil and petroleum refining equipment
  • Nuclear components
  • Food grade stainless steel for processing equipment
  • General metalworking applications that call for precipitation-hardening stainless steel

Standard Inventory Specifications 

  • UNS S17400
  • AMS 5604
  • ASTM A 693
  • ASME SA 693
  • W.NR. 1.4542
  • PWA-LCS
  • GE-S400/S1000
  • RR SABRe Edition 2
  • DFARS Compliant
  • SAE AMS 5604

Common Trade Names

  • 17-4 (® AK Steel)
  • ATI 17-4 (™ Allegheny Technologies)

Inventory Size Range

  • Sheet : 0.029″ – 0.130″
  • Bar : 0.250″ – 5.000″
  • Plate : 0.1875″ – 2.500″

17-4PH Physical Properties

  • Melting Range: 2560-2625°F (1404-1440°C)
  • Density: 0.2820 lb/in³

Mean Coefficient of Thermal Expansion (Annealed Condition)

 
Temperature Range Coefficients
°C °F μm/m·°C in/in/°F·106
21-93 70-200 10.8 6.0
21-204 70-400 10.8 6.0
21-316 70-600 11.2 6.2
21-427 70-800 11.2 6.3

Thermal Conductivity (H 900 Condition)

 
Temperature Range W/m·K Btu/(hr/ft²/in/°F)
°C °F
149 300 17.90 124
260 500 19.50 135
460 860 22.50 156
482 900 22.60 157

Specific Heat (Annealed Condition)

 
Temperature Range J/gg·K Btu/lb/°F
°C °F
0-100 32-212 460 0.11

Electrical Resistivity (Annealed Condition)

  • Microhm-cm: 98

Mechanical Properties and Yield Strength 17-4PH Stainless Steel – Cold Flattened (Annealed)

  • Ultimate Tensile Strength Ksi (MPa): 160 (1103)
  • 0.2% Tensile Yield Strength Ksi (MPa): 145 (1000)
  • Elongation % in 2″ (50mm): 5.0
  • Hardness Rockwell C: 35
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