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SAE-AISI M3 Class 2 Steel vs. S30815 Stainless Steel

Both SAE-AISI M3 class 2 steel and S30815 stainless 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 (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M3 class 2 steel and the bottom bar is S30815 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 770 to 2210
680

Thermal Properties

Latent Heat of Fusion, J/g 260
310
Melting Completion (Liquidus), °C 1620
1400
Melting Onset (Solidus), °C 1570
1360
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 26
15
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 25
17
Density, g/cm3 8.3
7.7
Embodied Carbon, kg CO2/kg material 12
3.3
Embodied Energy, MJ/kg 180
47
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 33
24
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 26 to 74
25
Strength to Weight: Bending, points 22 to 45
22
Thermal Diffusivity, mm2/s 7.2
4.0
Thermal Shock Resistance, points 24 to 69
15

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.050 to 0.1
Cerium (Ce), % 0
0.030 to 0.080
Chromium (Cr), % 3.8 to 4.5
20 to 22
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.8 to 82.3
62.8 to 68.4
Manganese (Mn), % 0.15 to 0.4
0 to 0.8
Molybdenum (Mo), % 4.8 to 6.5
0
Nickel (Ni), % 0 to 0.3
10 to 12
Nitrogen (N), % 0
0.14 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.45
1.4 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.8 to 3.8
0