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SAE-AISI M42 Steel vs. EN 1.4901 Stainless Steel

Both SAE-AISI M42 steel and EN 1.4901 stainless steel are iron alloys. They have 86% 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 M42 steel and the bottom bar is EN 1.4901 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 78
76
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
740

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1540
1490
Melting Onset (Solidus), °C 1490
1450
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 20
26
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 30
11
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 7.4
2.8
Embodied Energy, MJ/kg 100
40
Embodied Water, L/kg 140
89

Common Calculations

PREN (Pitting Resistance) 38
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
26
Strength to Weight: Bending, points 24 to 48
23
Thermal Diffusivity, mm2/s 5.4
6.9
Thermal Shock Resistance, points 25 to 71
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 1.1 to 1.2
0.070 to 0.13
Chromium (Cr), % 3.5 to 4.3
8.5 to 9.5
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.3 to 81
85.8 to 89.1
Manganese (Mn), % 0.15 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 9.0 to 10
0.3 to 0.6
Nickel (Ni), % 0 to 0.3
0 to 0.4
Niobium (Nb), % 0
0.040 to 0.090
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.15 to 0.65
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 1.2 to 1.9
1.5 to 2.0
Vanadium (V), % 1.0 to 1.4
0.15 to 0.25
Zirconium (Zr), % 0
0 to 0.010