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AWS E308H vs. ASTM B522 Class I

AWS E308H belongs to the iron alloys classification, while ASTM B522 class I belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is AWS E308H and the bottom bar is ASTM B522 class I.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
96
Elongation at Break, % 40
1.1 to 29
Poisson's Ratio 0.28
0.41
Shear Modulus, GPa 77
34
Tensile Strength: Ultimate (UTS), MPa 620
280 to 490

Thermal Properties

Latent Heat of Fusion, J/g 290
77
Melting Completion (Liquidus), °C 1420
1030
Melting Onset (Solidus), °C 1380
1030
Specific Heat Capacity, J/kg-K 480
160
Thermal Expansion, µm/m-K 14
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
5.8

Otherwise Unclassified Properties

Density, g/cm3 7.8
17

Common Calculations

Stiffness to Weight: Axial, points 14
3.1
Stiffness to Weight: Bending, points 25
8.9
Strength to Weight: Axial, points 22
4.4 to 7.8
Strength to Weight: Bending, points 21
5.5 to 8.0
Thermal Shock Resistance, points 16
13 to 24

Alloy Composition

Carbon (C), % 0.040 to 0.080
0
Chromium (Cr), % 18 to 21
0
Copper (Cu), % 0 to 0.75
0
Gold (Au), % 0
68 to 70
Iron (Fe), % 62.9 to 72.5
0
Manganese (Mn), % 0.5 to 2.5
0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 9.0 to 11
0
Phosphorus (P), % 0 to 0.040
0
Platinum (Pt), % 0
5.0 to 7.0
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
23.5 to 26.5
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.35