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ACI-ASTM CH20 Steel vs. AWS BAu-3

ACI-ASTM CH20 steel belongs to the iron alloys classification, while AWS BAu-3 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CH20 steel and the bottom bar is AWS BAu-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
110
Poisson's Ratio 0.27
0.37
Shear Modulus, GPa 78
41
Tensile Strength: Ultimate (UTS), MPa 610
220

Thermal Properties

Latent Heat of Fusion, J/g 310
160
Melting Completion (Liquidus), °C 1410
1030
Melting Onset (Solidus), °C 1430
970
Specific Heat Capacity, J/kg-K 480
300
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Density, g/cm3 7.8
13

Common Calculations

Stiffness to Weight: Axial, points 14
5.0
Stiffness to Weight: Bending, points 25
13
Strength to Weight: Axial, points 22
4.9
Strength to Weight: Bending, points 21
6.4
Thermal Shock Resistance, points 15
8.7

Alloy Composition

Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 22 to 26
0
Copper (Cu), % 0
60.9 to 63
Gold (Au), % 0
34.5 to 35.5
Iron (Fe), % 54.7 to 66
0
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
2.5 to 3.5
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.15