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S32750 Stainless Steel vs. SAE-AISI M7 Steel

Both S32750 stainless steel and SAE-AISI M7 steel are iron alloys. They have 71% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is S32750 stainless steel and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
77
Tensile Strength: Ultimate (UTS), MPa 860
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1450
1560
Melting Onset (Solidus), °C 1400
1510
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 15
28
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 21
18
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.1
8.9
Embodied Energy, MJ/kg 56
130
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 43
35
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31
26 to 76
Strength to Weight: Bending, points 26
23 to 47
Thermal Diffusivity, mm2/s 4.0
7.8
Thermal Shock Resistance, points 25
24 to 69

Alloy Composition

Carbon (C), % 0 to 0.030
1.0 to 1.1
Chromium (Cr), % 24 to 26
3.5 to 4.0
Copper (Cu), % 0 to 0.5
0 to 0.25
Iron (Fe), % 58.1 to 66.8
79.8 to 83.8
Manganese (Mn), % 0 to 1.2
0.15 to 0.4
Molybdenum (Mo), % 3.0 to 5.0
8.2 to 9.2
Nickel (Ni), % 6.0 to 8.0
0 to 0.3
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.8
0.2 to 0.55
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3