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AWS E630 vs. ACI-ASTM CG8M Steel

Both AWS E630 and ACI-ASTM CG8M steel are iron alloys. They have 87% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AWS E630 and the bottom bar is ACI-ASTM CG8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0
45
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
79
Tensile Strength: Ultimate (UTS), MPa 1040
550

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
20
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
4.1
Embodied Energy, MJ/kg 40
56
Embodied Water, L/kg 140
160

Common Calculations

PREN (Pitting Resistance) 18
31
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 37
19
Strength to Weight: Bending, points 29
19
Thermal Diffusivity, mm2/s 4.5
4.3
Thermal Shock Resistance, points 28
12

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.080
Chromium (Cr), % 16 to 16.8
18 to 21
Copper (Cu), % 3.3 to 4.0
0
Iron (Fe), % 71.6 to 75.9
58.8 to 70
Manganese (Mn), % 0.25 to 0.75
0 to 1.5
Molybdenum (Mo), % 0 to 0.75
3.0 to 4.0
Nickel (Ni), % 4.5 to 5.0
9.0 to 13
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 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040