eFunda: Properties of Stainless Steel 17-4PH
engineering fundamentals Stainless Steel 17-4PH
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17-4PH
Category Steel
Class Stainless steel
Type Precipitation-hardening standard
Designations  United States: AMS 5342 , AMS 5343 , AMS 5344 , AMS 5355 , AMS 5604 , AMS 5622 , AMS 5643 , AMS 5825 , ASME SA564 , ASME SA705 , ASTM A564 , ASTM A693 , ASTM A705 , MIL SPEC MIL-C-24111 , MIL SPEC MIL-S-81506 , MIL SPEC MIL-S-81591 , SAE J467 (17-4PH) , UNS S17400

Composition

ElementWeight %
C  0.07 
Mn  1.00 
Si  1.00 
Cr  15.5-17.5 
Ni  3.0-5.0 
P  0.04 
S  0.03 
Cu  3.0-5.0 
Nb+Ta  0.15-0.45 

Mechanical Properties

Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 196 25  
Tensile Strength (Mpa) 1070  25  H1025 (bar, plate, sheet, strip) more
Yield Strength (Mpa) 1000 
Elongation (%) 12 
Reduction in Area (%) 45 
Hardness (HRC) 35-42  25  H1025 (bar, plate, sheet, strip) more

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 10.8  0-100 more  
Thermal Conductivity (W/m-K) 18.3  100 more  
Specific Heat (J/kg-K) 460  0-100   

Electric Properties

Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 800  25   
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