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ASTM A225 Steel vs. SAE-AISI O7 Steel

Both ASTM A225 steel and SAE-AISI O7 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 A225 steel and the bottom bar is SAE-AISI O7 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 620 to 830
680 to 2110

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
41
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
6.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.8
2.3
Embodied Energy, MJ/kg 24 to 25
33
Embodied Water, L/kg 48
52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 29
24 to 74
Strength to Weight: Bending, points 21 to 25
22 to 46
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 18 to 24
23 to 70

Comparable Variants