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SAE-AISI H22 Steel vs. SAE-AISI O7 Steel

Both SAE-AISI H22 steel and SAE-AISI O7 steel are iron alloys. They have 88% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H22 steel and the bottom bar is SAE-AISI O7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
680 to 2110

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1670
1480
Melting Onset (Solidus), °C 1620
1430
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 31
41
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 28
6.0
Density, g/cm3 8.7
7.9
Embodied Carbon, kg CO2/kg material 4.9
2.3
Embodied Energy, MJ/kg 73
33
Embodied Water, L/kg 72
52

Common Calculations

PREN (Pitting Resistance) 21
3.6
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 22 to 61
24 to 74
Strength to Weight: Bending, points 20 to 39
22 to 46
Thermal Diffusivity, mm2/s 8.2
11
Thermal Shock Resistance, points 22 to 60
23 to 70

Alloy Composition

Carbon (C), % 0.3 to 0.4
1.1 to 1.3
Chromium (Cr), % 1.8 to 3.8
0.35 to 0.85
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 82.2 to 87.4
92.9 to 97.6
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 10 to 11.8
1.0 to 2.0
Vanadium (V), % 0.25 to 0.5
0 to 0.4

Comparable Variants