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AISI 1040
Category Steel
Class Carbon steel
Type Standard
Designations  Germany: DIN 1.1186
Japan: JIS S 4O C
United Kingdom: B.S. 080 A 40 , B.S. 2 S 93
United States: ASTM A108 , ASTM A29 , ASTM A510 , ASTM A519 , ASTM A546 , ASTM A576 , ASTM A682 , MIL SPEC MIL-S-11310 (CS1040) , SAE J403 , SAE J412 , SAE J414 , UNS G10400

Composition
ElementWeight %
C  0.37-0.44 
Mn  0.60-0.90 
P  0.04 (max) 
S  0.05 (max) 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 7.845 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 25  
Tensile Strength (Mpa) 518.8  25  annealed at 790°C  more
Yield Strength (Mpa) 353.4 
Elongation (%) 30.2 
Reduction in Area (%) 57.2 
Hardness (HB) 149  25  annealed at 790°C more
Impact Strength (J)
(Izod)
44.3  25  annealed at 790°C  more

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 13.6  20-1000 more annealed 

Electric Properties
Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 171  20 more  
Glossary