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SAE-AISI M3 Class 1 Steel vs. S40975 Stainless Steel

Both SAE-AISI M3 class 1 steel and S40975 stainless steel are iron alloys. They have 85% 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 SAE-AISI M3 class 1 steel and the bottom bar is S40975 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
460

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1610
1450
Melting Onset (Solidus), °C 1570
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 26
26
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 25
6.5
Density, g/cm3 8.3
7.8
Embodied Carbon, kg CO2/kg material 10
2.0
Embodied Energy, MJ/kg 150
28
Embodied Water, L/kg 100
95

Common Calculations

PREN (Pitting Resistance) 33
11
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 72
17
Strength to Weight: Bending, points 22 to 44
17
Thermal Diffusivity, mm2/s 7.2
7.0
Thermal Shock Resistance, points 24 to 67
17

Alloy Composition

Carbon (C), % 1.0 to 1.1
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
10.5 to 11.7
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.9 to 82.9
84.4 to 89
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.8 to 6.5
0
Nickel (Ni), % 0 to 0.3
0.5 to 1.0
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0 to 0.75
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.3 to 2.8
0