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

Both SAE-AISI S7 steel and SAE-AISI M1 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 S7 steel and the bottom bar is SAE-AISI M1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
77
Tensile Strength: Ultimate (UTS), MPa 670 to 2030
730 to 2140

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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

Comparable Variants