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S35140 Stainless Steel vs. SAE-AISI M7 Steel

Both S35140 stainless steel and SAE-AISI M7 steel are iron alloys. They have 55% 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 S35140 stainless 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 0.28
0.29
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 690
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1420
1560
Melting Onset (Solidus), °C 1370
1510
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 14
28
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 31
18
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 5.5
8.9
Embodied Energy, MJ/kg 78
130
Embodied Water, L/kg 190
100

Common Calculations

PREN (Pitting Resistance) 28
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
26 to 76
Strength to Weight: Bending, points 22
23 to 47
Thermal Diffusivity, mm2/s 3.7
7.8
Thermal Shock Resistance, points 16
24 to 69

Alloy Composition

Carbon (C), % 0 to 0.1
1.0 to 1.1
Chromium (Cr), % 20 to 22
3.5 to 4.0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 44.1 to 52.7
79.8 to 83.8
Manganese (Mn), % 1.0 to 3.0
0.15 to 0.4
Molybdenum (Mo), % 1.0 to 2.0
8.2 to 9.2
Nickel (Ni), % 25 to 27
0 to 0.3
Niobium (Nb), % 0.25 to 0.75
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0.2 to 0.55
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3