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SAE-AISI M42 Steel vs. EN 1.4021 Stainless Steel

Both SAE-AISI M42 steel and EN 1.4021 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 22 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 1.4021 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
630 to 880

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1540
1440
Melting Onset (Solidus), °C 1490
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 20
30
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 30
7.0
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 7.4
1.9
Embodied Energy, MJ/kg 100
27
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 38
13
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 28 to 79
23 to 31
Strength to Weight: Bending, points 24 to 48
21 to 26
Thermal Diffusivity, mm2/s 5.4
8.1
Thermal Shock Resistance, points 25 to 71
22 to 31

Alloy Composition

Carbon (C), % 1.1 to 1.2
0.16 to 0.25
Chromium (Cr), % 3.5 to 4.3
12 to 14
Cobalt (Co), % 7.8 to 8.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.3 to 81
83.2 to 87.8
Manganese (Mn), % 0.15 to 0.4
0 to 1.5
Molybdenum (Mo), % 9.0 to 10
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
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
0
Vanadium (V), % 1.0 to 1.4
0

Comparable Variants