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SAE-AISI M42 Steel vs. EN 1.4971 Stainless Steel

Both SAE-AISI M42 steel and EN 1.4971 stainless steel are iron alloys. They have 48% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (9, 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 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
81
Tensile Strength: Ultimate (UTS), MPa 810 to 2310
800

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1490
1410
Specific Heat Capacity, J/kg-K 450
450
Thermal Conductivity, W/m-K 20
13
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 30
70
Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 7.4
7.6
Embodied Energy, MJ/kg 100
110
Embodied Water, L/kg 140
300

Common Calculations

PREN (Pitting Resistance) 38
38
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
3.4
Thermal Shock Resistance, points 25 to 71
19

Alloy Composition

Carbon (C), % 1.1 to 1.2
0.080 to 0.16
Chromium (Cr), % 3.5 to 4.3
20 to 22.5
Cobalt (Co), % 7.8 to 8.8
18.5 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.3 to 81
24.3 to 37.1
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 9.0 to 10
2.5 to 3.5
Nickel (Ni), % 0 to 0.3
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.15 to 0.65
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 1.2 to 1.9
2.0 to 3.0
Vanadium (V), % 1.0 to 1.4
0