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SAE-AISI H22 Steel vs. SAE-AISI M7 Steel

Both SAE-AISI H22 steel and SAE-AISI M7 steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is SAE-AISI H22 steel and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1670
1560
Melting Onset (Solidus), °C 1620
1510
Specific Heat Capacity, J/kg-K 440
450
Thermal Conductivity, W/m-K 31
28
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 28
18
Density, g/cm3 8.7
8.1
Embodied Carbon, kg CO2/kg material 4.9
8.9
Embodied Energy, MJ/kg 73
130
Embodied Water, L/kg 72
100

Common Calculations

PREN (Pitting Resistance) 21
35
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 22 to 61
26 to 76
Strength to Weight: Bending, points 20 to 39
23 to 47
Thermal Diffusivity, mm2/s 8.2
7.8
Thermal Shock Resistance, points 22 to 60
24 to 69

Alloy Composition

Carbon (C), % 0.3 to 0.4
1.0 to 1.1
Chromium (Cr), % 1.8 to 3.8
3.5 to 4.0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 82.2 to 87.4
79.8 to 83.8
Manganese (Mn), % 0.15 to 0.4
0.15 to 0.4
Molybdenum (Mo), % 0
8.2 to 9.2
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
0.2 to 0.55
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 10 to 11.8
1.4 to 2.1
Vanadium (V), % 0.25 to 0.5
1.8 to 2.3

Comparable Variants