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17-4PH Stainless Steel Sheet, Coil and Plate - AMS 5604, UNS S17400
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Nimonic 75 Pipe

17-7PH Stainless Steel Sheet, Plate & Coil – AMS 5528, UNS S17700

17-7 PH is a precipitation-hardened stainless steel that is well suited for  aerospace and other applications requiring high strength and good corrosion resistance and formability.  Type 17-7PH is a Chromium-Nickel-Aluminum, austenitic stainless steel.  It is the most formable of all PH grades and has the highest strength and hardness.  It is less magnetic than other PH grades and offers minimal distortion upon heat treatment. This material maintains its valuable properties at temperatures up to 800° F (427° C).

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Description

17-7PH Chemical Composition

 
Element Percent By Weight
Type 17-7ph
C Carbon 0.09 maximum
Mn Manganese 1.00 maximum
P Phosphorus 0.05 maximum
S Sulfur 0.03 maximum
Si Silicon 1.00 maximum
Cr Chromium 16.00 – 18.00
Ni Nickel 6.75 – 7.75
Al Aluminum 0.75 – 1.50

Common Applications of 17-7 PH Stainless Steel 

  • Aerospace applications
  • Chemical processing equipment
  • Oil and petroleum refining equipment
  • Food grade stainless steel for processing equipment
  • General metalworking

Standard Inventory Specifications 

  • UNS S17700
  • AMS 5528
  • ASTM A 693
  • ASME SA 693
  • W.NR 1.4541
  • PWA-LCS
  • GE-S400/1000
  • RR SABRe Edition 2
  • DFARS Compliant
  • SAE AMS 5528

Common Trade Names

  • 17-7 (® AK Steel)
  • ATI 17-7 (™ Allegheny Technologies)
  • T-17-7 Stainless Steel (ThyssenKrupp VDM)

Inventory Size Range

  • Sheet : 0.018″ – 0.187″
  • Plate : 0.018″ – 0.187″

7-7PH Physical Properties

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

Mean Coefficient of Thermal Expansion (Annealed Condition)

 
Temperature Range Mean Coefficient of Thermal Expansion
°C °F μm/m°C in/in/°F·10⁶
21-93 70-200 15.3 8.5
21-204 70-400 16.2 9.0
21-316 70-600 17.1 9.5
21-427 70-800 17.3 9.6

Thermal Conductivity (TH 1050 Condition)

 
Temperature Range Coefficients
°C °F W/m·K Btu/(hr/ft²/in/°F)
149 300 16.87 117
260 500 18.46 128
449 840 21.05 146
482 900 21.05 146

Magnetic Permeability (Annealed Condition)

 
Oersteds AT/m μ
25 1989 1.4 – 3.4
50 3878 1.4 – 3.6
100 7956 1.4 – 3.5
200 15.912 1.4 – 3.2
max max 1.4 – 3.6

Electrical Resistivity (Annealed Condition)

  • Microhm-cm: 80

 

Mechanical Properties and Yield Strength of 17-7PH

Room Temperatures (Annealed)

  • Ultimate Tensile Strength psi (MPa): 130,000 (896)
  • 0.2% Tensile Yield Strength psi (MPa): 40,000 (276)
  • Elongation % in 2″ (50mm): 35
  • Hardness Rockwell: B85

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