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EN 1.4938 Stainless Steel vs. AWS E318

Both EN 1.4938 stainless steel and AWS E318 are iron alloys. They have 81% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 AWS E318.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 16 to 17
29
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
620

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 30
15
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
23
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
4.4
Embodied Energy, MJ/kg 47
62
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 18
27
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
22
Strength to Weight: Bending, points 26 to 29
20
Thermal Diffusivity, mm2/s 8.1
4.0
Thermal Shock Resistance, points 30 to 35
16

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.080
Chromium (Cr), % 11 to 12.5
17 to 20
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 80.5 to 84.8
57.6 to 69.5
Manganese (Mn), % 0.4 to 0.9
0.5 to 2.5
Molybdenum (Mo), % 1.5 to 2.0
2.0 to 3.0
Nickel (Ni), % 2.0 to 3.0
11 to 14
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0.020 to 0.040
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.25 to 0.4
0