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SAE-AISI A7 Steel vs. ASTM A302 Alloy Steel

Both SAE-AISI A7 steel and ASTM A302 alloy steel are iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
590 to 620

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 37
39 to 51
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.4 to 3.0
Density, g/cm3 7.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 13
1.5 to 1.6
Embodied Energy, MJ/kg 200
20 to 21
Embodied Water, L/kg 100
48 to 50

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29 to 77
21 to 22
Strength to Weight: Bending, points 25 to 48
20 to 21
Thermal Diffusivity, mm2/s 10
10 to 14
Thermal Shock Resistance, points 27 to 72
17 to 18