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  • Alloy
17-4

Stainless Steel 17-4 Product Guide

 

Applications | Specifications | Mechanical and Chemical Data | Tolerances

 

Overview

17-4 stainless has high tensile strength and hardness and excellent corrosion resistance up to high temperatures. It is typically used in gate valves, chemical processing equipment, pump shafts, gears, ball bearings, bushings, and fasteners.

 

Common Trade Names

UNS S17400, SAE type 630 stainless, AK Steel 17-4 PH®*, PH17-4, 17-4PH, 17Cr-4Ni, Precipitation Hardening

 

*AK Steel 17-4 PH® is a registered trademark of AK Steel Holding Corporation.

 

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

 

Products

Purchase Round Bar 17-4 | Square Bar 17-4 | Sheet/Plate 17-4

 

Applications

  • Gate Valves
  • Chemical Processing Equipment
  • Pump Shafts
  • Gears
  • Ball Bearings
  • Bushings
  • Fasteners

 

Stainless 17-4 Specifications

ASTM

AMS

ASME

A564 5604 SA564
A693 5622 SA693
A705 5643 SA705
  5825  



Physical Properties 17-4
 
Annealed
-H900
Density 0.280 lb/in3 0.282 lb/in3
Ultimate Tensile Strength 160 ksi 210 ksi
Yield Tensile Strength 145 ksi 200 ksi
Fatigue Strength N/A 98 ksi
Shear Strength N/A 120 ksi
Shear Modulus N/A 11,000 ksi
Hardness Rockwell | Brinell C36 | 363 C40-47 | 388-444
Elongation at Break Percentage 6-15% 12%
Reduction of Area 30-60% 35-40%
Modulus of Elasticity N/A 28,000 ksi
Poisson's Ratio 0.28 0.28
Machinability Percentage 45% N/A
Melting Point 2,550-2,620 °F 2,550-2,620 °F
Specific Heat 1.1 x 10^-1 BTU/lb-°F 1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity 116 BTU-in/hr-ft^2-°F 116 BTU-in/hr-ft^2-°F
Electrical Conductivity 2.3% IACS 2.3% IACS


Chemistry Information
Element
Percentage
C 0.07 max
Cu 3 - 5
Cr 15 - 17.5
Fe 73
Mn 1 max
Nb + Ta 0.15 - 0.45
Nb 0.45 max
Ni 3 - 5
P 0.04 max
S 0.03 max
Si 1 max
Ta 0.45 max
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