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AISI 3140
Category Steel
Class Alloy steel
Type Standard
Common Names Nickel-chromium steel
Designations  Germany: DIN 1.5711
United Kingdom: B.S. 640 M 40
United States: ASTM A322 , ASTM A331 , ASTM A519 , ASTM A711 , MIL SPEC MIL-S-16974 , SAE J776 , UNS G31400

Composition

ElementWeight %
C  0.40-0.50 
Mn  0.50-0.80 
Cr  0.45-0.75 
Ni  1.00-1.50 

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) 190-210 25  
Tensile Strength (Mpa) 689.5  25  annealed at 815°C  more
Yield Strength (Mpa) 422.6 
Elongation (%) 24.5 
Reduction in Area (%) 50.8 
Hardness (HB) 197  25  annealed at 815°C more
Impact Strength (J)
(Izod)
46.4  25  annealed at 815°C  more

Thermal Properties

Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 11.8  0-100 more hardened and tempered 
Glossary