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SAE-AISI M50 Steel vs. EN 1.4378 Stainless Steel

Both SAE-AISI M50 steel and EN 1.4378 stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M50 steel and the bottom bar is EN 1.4378 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 720 to 2250
760 to 1130

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1480
1390
Melting Onset (Solidus), °C 1440
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Expansion, µm/m-K 13
17

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
12
Density, g/cm3 7.9
7.6
Embodied Carbon, kg CO2/kg material 5.1
2.7
Embodied Energy, MJ/kg 74
39
Embodied Water, L/kg 83
150

Common Calculations

PREN (Pitting Resistance) 19
23
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 80
28 to 41
Strength to Weight: Bending, points 23 to 49
24 to 31
Thermal Shock Resistance, points 21 to 66
16 to 23

Alloy Composition

Carbon (C), % 0.78 to 0.88
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
17 to 19
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.4
61.2 to 69
Manganese (Mn), % 0.15 to 0.45
11.5 to 14.5
Molybdenum (Mo), % 3.9 to 4.8
0
Nickel (Ni), % 0 to 0.3
2.3 to 3.7
Nitrogen (N), % 0
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.060
Silicon (Si), % 0.2 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.3
0