ASTM A320 Steel Properties

The below table outlines the material properties for ASTM A320 material including the young's modulus, yield strength, ultimate strength and other relevant mechanical properties required for structural and mechanical design.

Grade B8

Class 1 All
Class 2 Up to ¾
Class 2 ⅞ - 1
Class 2 1⅛ - 1¼
Class 2 1⅜ - 1½

Grade B8M

Class 1 All
Class 2 Up to ¾
Class 2 ⅞ - 1
Class 2 1⅛ - 1¼
Class 2 1⅜ - 1½

Grade L7

Up to 2½

Grade L43

Up to 4

ASTM A320 Young's Modulus

The Young's Modulus of ASTM A320 is 29,000 ksi.

ASTM A320 Ultimate Strength

The Ultimate Strength of ASTM A320 ranges between 75 and 125 ksi.

ASTM A320 Yield Strength

The Yield Strength of ASTM A320 ranges between 30 and 105 ksi depending on the material grade. See the below tables to get your specific material grade material strength.

Grade B8 Steel Properties

Class 1 All Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	517 MPa	207 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	75 ksi	30 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 Up to ¾ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	862 MPa	689 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	125 ksi	100 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 ⅞ - 1 Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	793 MPa	552 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	115 ksi	80 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 1⅛ - 1¼ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	724 MPa	448 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	105 ksi	65 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 1⅜ - 1½ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	689 MPa	345 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	100 ksi	50 ksi	29,000 ksi	491 lb/ft³	0.29

Grade B8M Steel Properties

Class 1 All Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	517 MPa	207 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	75 ksi	30 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 Up to ¾ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	758 MPa	655 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	110 ksi	95 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 ⅞ - 1 Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	689 MPa	552 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	100 ksi	80 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 1⅛ - 1¼ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	655 MPa	448 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	95 ksi	65 ksi	29,000 ksi	491 lb/ft³	0.29

Class 2 1⅜ - 1½ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	621 MPa	345 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	90 ksi	50 ksi	29,000 ksi	491 lb/ft³	0.29

Grade L7 Steel Properties

Up to 2½ Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	862 MPa	724 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	125 ksi	105 ksi	29,000 ksi	491 lb/ft³	0.29

Grade L43 Steel Properties

Up to 4 Material Properties

Unit System	Ultimate Strength, F_u	Yield Strength, F_y	Young's Modulus, E	Density, ρ	Poisson's Ratio, ν
Metric	862 MPa	724 MPa	200,000 MPa	7,800 kg/m³	0.29
Imperial	125 ksi	105 ksi	29,000 ksi	491 lb/ft³	0.29

ASTM A307 Steel Properties ASTM A351 Steel Properties