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SAE-AISI M43 Steel vs. S39274 Stainless Steel

Both SAE-AISI M43 steel and S39274 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 M43 steel and the bottom bar is S39274 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 77
81
Tensile Strength: Ultimate (UTS), MPa 810 to 2290
900

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1550
1480
Melting Onset (Solidus), °C 1500
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 19
16
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 33
24
Density, g/cm3 8.2
8.0
Embodied Carbon, kg CO2/kg material 8.5
4.3
Embodied Energy, MJ/kg 120
60
Embodied Water, L/kg 140
180

Common Calculations

PREN (Pitting Resistance) 35
43
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 77
32
Strength to Weight: Bending, points 24 to 47
26
Thermal Diffusivity, mm2/s 5.3
4.2
Thermal Shock Resistance, points 25 to 71
25

Alloy Composition

Carbon (C), % 1.2 to 1.3
0 to 0.030
Chromium (Cr), % 3.5 to 4.3
24 to 26
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0.2 to 0.8
Iron (Fe), % 70.8 to 76
57 to 65.6
Manganese (Mn), % 0.2 to 0.4
0 to 1.0
Molybdenum (Mo), % 7.5 to 8.5
2.5 to 3.5
Nickel (Ni), % 0 to 0.3
6.0 to 8.0
Nitrogen (N), % 0
0.24 to 0.32
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.15 to 0.65
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 2.3 to 3.0
1.5 to 2.5
Vanadium (V), % 1.5 to 1.8
0