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SAE-AISI M42 Steel vs. EN 1.4740 Stainless Steel

Both SAE-AISI M42 steel and EN 1.4740 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 18 material properties with values for both materials. Properties with values for just one material (10, 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 1.4740 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

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1540
1420
Melting Onset (Solidus), °C 1490
1370
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 20
18
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 30
9.5
Density, g/cm3 8.2
7.6
Embodied Carbon, kg CO2/kg material 7.4
2.3
Embodied Energy, MJ/kg 100
32
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 38
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 5.4
4.8

Alloy Composition

Carbon (C), % 1.1 to 1.2
0.3 to 0.5
Chromium (Cr), % 3.5 to 4.3
16 to 19
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.3 to 81
75.4 to 82.7
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 9.0 to 10
0 to 0.5
Nickel (Ni), % 0 to 0.3
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.65
1.0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.2 to 1.9
0
Vanadium (V), % 1.0 to 1.4
0