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SAE-AISI A2 Steel vs. ASTM A302 Alloy Steel

Both SAE-AISI A2 steel and ASTM A302 alloy 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 SAE-AISI A2 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 74
73
Tensile Strength: Ultimate (UTS), MPa 710 to 2040
590 to 620

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 38
39 to 51
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 5.5
2.4 to 3.0
Density, g/cm3 7.8
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 2.7
1.5 to 1.6
Embodied Energy, MJ/kg 38
20 to 21
Embodied Water, L/kg 73
48 to 50

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 73
21 to 22
Strength to Weight: Bending, points 23 to 46
20 to 21
Thermal Diffusivity, mm2/s 10
10 to 14
Thermal Shock Resistance, points 25 to 71
17 to 18