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AWS E430 vs. AWS E630

Both AWS E430 and AWS E630 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 E430 and the bottom bar is AWS E630.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
8.0
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 500
1040

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1440
1430
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
17
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.6

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
2.8
Embodied Energy, MJ/kg 31
40
Embodied Water, L/kg 120
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 18
37
Strength to Weight: Bending, points 18
29
Thermal Diffusivity, mm2/s 6.7
4.5
Thermal Shock Resistance, points 13
28

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.050
Chromium (Cr), % 15 to 18
16 to 16.8
Copper (Cu), % 0 to 0.75
3.3 to 4.0
Iron (Fe), % 77.8 to 85
71.6 to 75.9
Manganese (Mn), % 0 to 1.0
0.25 to 0.75
Molybdenum (Mo), % 0 to 0.75
0 to 0.75
Nickel (Ni), % 0 to 0.6
4.5 to 5.0
Niobium (Nb), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.9
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030