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AWS E308H vs. ACI-ASTM CD4MCuN Steel

Both AWS E308H and ACI-ASTM CD4MCuN steel are iron alloys. They have 90% 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 E308H and the bottom bar is ACI-ASTM CD4MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
18
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
79
Tensile Strength: Ultimate (UTS), MPa 620
770

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Melting Completion (Liquidus), °C 1420
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
17
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 16
18
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
3.5
Embodied Energy, MJ/kg 46
49
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 21
35
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
28
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 4.2
4.5
Thermal Shock Resistance, points 16
21

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.040
Chromium (Cr), % 18 to 21
24.5 to 26.5
Copper (Cu), % 0 to 0.75
2.7 to 3.3
Iron (Fe), % 62.9 to 72.5
59.5 to 66.3
Manganese (Mn), % 0.5 to 2.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.75
1.7 to 2.3
Nickel (Ni), % 9.0 to 11
4.7 to 6.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.040