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AISI 1020
Category Steel
Class Carbon steel
Type Standard
Designations  France: AFNOR CC 20
Germany: DIN 1.0402
Italy: UNI C 20
Sweden: SS 1450
United Kingdom: B.S. 040 A 20 , B.S. 070 M 20
United States: AMS 5032 , AMS 5032B , AMS 5045 , AMS 5045C , ASTM A108 , ASTM A29 , ASTM A510 , ASTM A519 , ASTM A544 , ASTM A575 , ASTM A576 , ASTM A659 , MIL SPEC MIL-S-11310 (CS1020) , SAE J403 , SAE J412 , SAE J414 , UNS G10200

Composition
ElementWeight %
C  0.18-0.23 
Mn  0.30-0.60 
P  0.04 (max) 
S  0.05 (max) 

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) 394.7  25  annealed at 870°C  more
Yield Strength (Mpa) 294.8 
Elongation (%) 36.5 
Reduction in Area (%) 66.0 
Hardness (HB) 111  25  annealed at 870°C more
Impact Strength (J)
(Izod)
123.4  25  annealed at 870°C  more

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 14.8  20-700 more annealed 
Glossary