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SAE-AISI M42 Steel vs. EN 1.4640 Stainless Steel

Both SAE-AISI M42 steel and EN 1.4640 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 M42 steel and the bottom bar is EN 1.4640 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 78
77
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
620 to 650

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1540
1420
Melting Onset (Solidus), °C 1490
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 20
15
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 30
14
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 7.4
2.8
Embodied Energy, MJ/kg 100
40
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 38
20
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 79
22 to 23
Strength to Weight: Bending, points 24 to 48
21
Thermal Diffusivity, mm2/s 5.4
4.0
Thermal Shock Resistance, points 25 to 71
14 to 15

Alloy Composition

Carbon (C), % 1.1 to 1.2
0.030 to 0.080
Chromium (Cr), % 3.5 to 4.3
18 to 19
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
1.3 to 2.0
Iron (Fe), % 76.3 to 81
67.4 to 73.6
Manganese (Mn), % 0.15 to 0.4
1.5 to 4.0
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
5.5 to 6.9
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.030
0 to 0.045
Silicon (Si), % 0.15 to 0.65
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0