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SAE-AISI A4 Steel vs. ASTM A203 Steel

Both SAE-AISI A4 steel and ASTM A203 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 A4 steel and the bottom bar is ASTM A203 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
73
Tensile Strength: Ultimate (UTS), MPa 710 to 2050
520 to 590

Thermal Properties

Latent Heat of Fusion, J/g 250
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 40
52
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.5 to 8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.9
3.2 to 4.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.6 to 1.7
Embodied Energy, MJ/kg 24
21 to 23
Embodied Water, L/kg 59
50 to 52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 73
18 to 21
Strength to Weight: Bending, points 23 to 46
18 to 20
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 23 to 67
15 to 17