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ASTM A302 Alloy Steel vs. SAE-AISI S7 Steel

Both ASTM A302 alloy steel and SAE-AISI S7 steel are iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is ASTM A302 alloy steel and the bottom bar is SAE-AISI S7 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 73
74
Tensile Strength: Ultimate (UTS), MPa 590 to 620
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39 to 51
40
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
5.0
Density, g/cm3 7.8 to 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
2.3
Embodied Energy, MJ/kg 20 to 21
31
Embodied Water, L/kg 48 to 50
65

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21 to 22
24 to 72
Strength to Weight: Bending, points 20 to 21
22 to 46
Thermal Diffusivity, mm2/s 10 to 14
11
Thermal Shock Resistance, points 17 to 18
22 to 66