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SAE-AISI M1 Steel vs. SAE-AISI S7 Steel

Both SAE-AISI M1 steel and SAE-AISI S7 steel are iron alloys. They have 89% 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 M1 steel and the bottom bar is SAE-AISI S7 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
74
Tensile Strength: Ultimate (UTS), MPa 730 to 2140
670 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1560
1460
Melting Onset (Solidus), °C 1510
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 29
40
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 18
5.0
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 7.0
2.3
Embodied Energy, MJ/kg 99
31
Embodied Water, L/kg 98
65

Common Calculations

PREN (Pitting Resistance) 35
8.4
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 73
24 to 72
Strength to Weight: Bending, points 22 to 45
22 to 46
Thermal Diffusivity, mm2/s 8.0
11
Thermal Shock Resistance, points 23 to 66
22 to 66

Alloy Composition

Carbon (C), % 0.78 to 0.88
0.45 to 0.55
Chromium (Cr), % 3.5 to 4.0
3.0 to 3.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 81 to 84.8
91.6 to 94.9
Manganese (Mn), % 0.15 to 0.4
0.2 to 0.9
Molybdenum (Mo), % 8.2 to 9.2
1.3 to 1.8
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.5
0.2 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.4 to 2.1
0
Vanadium (V), % 1.0 to 1.4
0 to 0.3

Comparable Variants