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SAE-AISI M3 Class 2 Steel vs. EN 1.4740 Stainless Steel

Both SAE-AISI M3 class 2 steel and EN 1.4740 stainless steel are iron alloys. They have 85% 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 M3 class 2 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 77
77

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1620
1420
Melting Onset (Solidus), °C 1570
1370
Specific Heat Capacity, J/kg-K 440
490
Thermal Conductivity, W/m-K 26
18
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 25
9.5
Density, g/cm3 8.3
7.6
Embodied Carbon, kg CO2/kg material 12
2.3
Embodied Energy, MJ/kg 180
32
Embodied Water, L/kg 110
120

Common Calculations

PREN (Pitting Resistance) 33
18
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Thermal Diffusivity, mm2/s 7.2
4.8

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.3 to 0.5
Chromium (Cr), % 3.8 to 4.5
16 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.8 to 82.3
75.4 to 82.7
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 4.8 to 6.5
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), % 0.2 to 0.45
1.0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.8 to 3.8
0