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SAE-AISI M1 Steel vs. S21460 Stainless Steel

Both SAE-AISI M1 steel and S21460 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M1 steel and the bottom bar is S21460 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 730 to 2140
830

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1560
1380
Melting Onset (Solidus), °C 1510
1330
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
18

Otherwise Unclassified Properties

Base Metal Price, % relative 18
14
Density, g/cm3 8.1
7.6
Embodied Carbon, kg CO2/kg material 7.0
3.0
Embodied Energy, MJ/kg 99
43
Embodied Water, L/kg 98
160

Common Calculations

PREN (Pitting Resistance) 35
25
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 73
30
Strength to Weight: Bending, points 22 to 45
26
Thermal Shock Resistance, points 23 to 66
17

Alloy Composition

Carbon (C), % 0.78 to 0.88
0 to 0.12
Chromium (Cr), % 3.5 to 4.0
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81 to 84.8
57.3 to 63.7
Manganese (Mn), % 0.15 to 0.4
14 to 16
Molybdenum (Mo), % 8.2 to 9.2
0
Nickel (Ni), % 0 to 0.3
5.0 to 6.0
Nitrogen (N), % 0
0.35 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.2 to 0.5
0 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