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EN 1.4938 Stainless Steel vs. AWS E630

Both EN 1.4938 stainless steel and AWS E630 are iron alloys. They have 89% 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 E630.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 16 to 17
8.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
1040

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 30
17
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 10
14
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.3
2.8
Embodied Energy, MJ/kg 47
40
Embodied Water, L/kg 110
140

Common Calculations

PREN (Pitting Resistance) 18
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 37
37
Strength to Weight: Bending, points 26 to 29
29
Thermal Diffusivity, mm2/s 8.1
4.5
Thermal Shock Resistance, points 30 to 35
28

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.050
Chromium (Cr), % 11 to 12.5
16 to 16.8
Copper (Cu), % 0
3.3 to 4.0
Iron (Fe), % 80.5 to 84.8
71.6 to 75.9
Manganese (Mn), % 0.4 to 0.9
0.25 to 0.75
Molybdenum (Mo), % 1.5 to 2.0
0 to 0.75
Nickel (Ni), % 2.0 to 3.0
4.5 to 5.0
Niobium (Nb), % 0
0.15 to 0.3
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 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.25 to 0.4
0