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AWS E630 vs. EN 1.6781 Steel

Both AWS E630 and EN 1.6781 steel are iron alloys. They have 80% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is AWS E630 and the bottom bar is EN 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0
17
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 1040
830

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 17
44
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 14
5.0
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.9
Embodied Energy, MJ/kg 40
25
Embodied Water, L/kg 140
60

Common Calculations

PREN (Pitting Resistance) 18
3.3
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 37
29
Strength to Weight: Bending, points 29
25
Thermal Diffusivity, mm2/s 4.5
12
Thermal Shock Resistance, points 28
24

Alloy Composition

Carbon (C), % 0 to 0.050
0.15 to 0.19
Chromium (Cr), % 16 to 16.8
1.3 to 1.8
Copper (Cu), % 3.3 to 4.0
0
Iron (Fe), % 71.6 to 75.9
92.6 to 94.6
Manganese (Mn), % 0.25 to 0.75
0.55 to 0.8
Molybdenum (Mo), % 0 to 0.75
0.45 to 0.6
Nickel (Ni), % 4.5 to 5.0
3.0 to 3.5
Niobium (Nb), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 0.75
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015