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AWS E630 vs. AWS E410NiMo

Both AWS E630 and AWS E410NiMo are iron alloys. Both are furnished in the post-weld heat treated (PWHT) condition. They have a moderately high 92% of their average alloy composition in common.

For each property being compared, the top bar is AWS E630 and the bottom bar is AWS E410NiMo.

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
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 1040
850

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 17
24
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 14
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.8
2.4
Embodied Energy, MJ/kg 40
34
Embodied Water, L/kg 140
110

Common Calculations

PREN (Pitting Resistance) 18
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 37
30
Strength to Weight: Bending, points 29
26
Thermal Diffusivity, mm2/s 4.5
6.5
Thermal Shock Resistance, points 28
23

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.060
Chromium (Cr), % 16 to 16.8
11 to 12.5
Copper (Cu), % 3.3 to 4.0
0 to 0.75
Iron (Fe), % 71.6 to 75.9
79 to 84.6
Manganese (Mn), % 0.25 to 0.75
0 to 1.0
Molybdenum (Mo), % 0 to 0.75
0.4 to 0.7
Nickel (Ni), % 4.5 to 5.0
4.0 to 5.0
Niobium (Nb), % 0.15 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 0.9
Sulfur (S), % 0 to 0.030
0 to 0.030