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SAE-AISI M41 Steel vs. S21640 Stainless Steel

Both SAE-AISI M41 steel and S21640 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 22 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 M41 steel and the bottom bar is S21640 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
78
Tensile Strength: Ultimate (UTS), MPa 800 to 2290
740

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1600
1430
Melting Onset (Solidus), °C 1550
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 22
15
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 33
17
Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 9.1
3.6
Embodied Energy, MJ/kg 140
51
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 28
26
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 76
27
Strength to Weight: Bending, points 23 to 46
23
Thermal Diffusivity, mm2/s 6.0
4.0
Thermal Shock Resistance, points 25 to 71
16

Alloy Composition

Carbon (C), % 1.1 to 1.2
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
17.5 to 19.5
Cobalt (Co), % 4.8 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.4 to 78.9
63 to 74.3
Manganese (Mn), % 0.2 to 0.6
3.5 to 6.5
Molybdenum (Mo), % 3.3 to 4.3
0.5 to 2.0
Nickel (Ni), % 0 to 0.3
4.0 to 6.5
Niobium (Nb), % 0
0.1 to 1.0
Nitrogen (N), % 0
0.080 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.15 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 6.3 to 7.0
0
Vanadium (V), % 1.8 to 2.3
0