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SAE-AISI 1070 Steel vs. SAE-AISI O7 Steel

Both SAE-AISI 1070 steel and SAE-AISI O7 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1070 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 72
73
Tensile Strength: Ultimate (UTS), MPa 640 to 760
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 50
41
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
6.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
2.3
Embodied Energy, MJ/kg 19
33
Embodied Water, L/kg 46
52

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 27
24 to 74
Strength to Weight: Bending, points 21 to 24
22 to 46
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 21 to 25
23 to 70

Alloy Composition

Carbon (C), % 0.65 to 0.75
1.1 to 1.3
Chromium (Cr), % 0
0.35 to 0.85
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 98.3 to 98.8
92.9 to 97.6
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0 to 0.050
0 to 0.030
Tungsten (W), % 0
1.0 to 2.0
Vanadium (V), % 0
0 to 0.4