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EN 1.4938 Stainless Steel vs. Grade 365 Molybdenum

EN 1.4938 stainless steel belongs to the iron alloys classification, while grade 365 molybdenum belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is EN 1.4938 stainless steel and the bottom bar is grade 365 molybdenum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
310
Elongation at Break, % 16 to 17
6.3
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 76
120
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
620
Tensile Strength: Yield (Proof), MPa 640 to 870
530

Thermal Properties

Latent Heat of Fusion, J/g 270
370
Specific Heat Capacity, J/kg-K 470
250
Thermal Expansion, µm/m-K 11
7.0

Otherwise Unclassified Properties

Density, g/cm3 7.8
10
Embodied Carbon, kg CO2/kg material 3.3
28
Embodied Energy, MJ/kg 47
330
Embodied Water, L/kg 110
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
37
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
450
Stiffness to Weight: Axial, points 14
17
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 31 to 37
17
Strength to Weight: Bending, points 26 to 29
16
Thermal Shock Resistance, points 30 to 35
21

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.010
Chromium (Cr), % 11 to 12.5
0
Iron (Fe), % 80.5 to 84.8
0 to 0.010
Manganese (Mn), % 0.4 to 0.9
0
Molybdenum (Mo), % 1.5 to 2.0
99.9 to 100
Nickel (Ni), % 2.0 to 3.0
0 to 0.0020
Nitrogen (N), % 0.020 to 0.040
0 to 0.0020
Oxygen (O), % 0
0 to 0.0015
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0 to 0.010
Sulfur (S), % 0 to 0.015
0
Vanadium (V), % 0.25 to 0.4
0