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ASTM Grade HP Steel vs. AWS BAu-6

ASTM grade HP steel belongs to the iron alloys classification, while AWS BAu-6 belongs to the otherwise unclassified metals. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 15 material properties with values for both materials. Properties with values for just one material (16, 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 ASTM grade HP steel and the bottom bar is AWS BAu-6.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Poisson's Ratio 0.28
0.39
Shear Modulus, GPa 78
43
Tensile Strength: Ultimate (UTS), MPa 490
190

Thermal Properties

Latent Heat of Fusion, J/g 320
120
Melting Completion (Liquidus), °C 1370
1050
Melting Onset (Solidus), °C 1330
1010
Specific Heat Capacity, J/kg-K 480
210
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Density, g/cm3 7.9
16

Common Calculations

Stiffness to Weight: Axial, points 14
4.0
Stiffness to Weight: Bending, points 25
10
Strength to Weight: Axial, points 17
3.2
Strength to Weight: Bending, points 17
4.5
Thermal Shock Resistance, points 11
8.5

Alloy Composition

Carbon (C), % 0.35 to 0.75
0
Chromium (Cr), % 24 to 28
0
Gold (Au), % 0
69.5 to 70.5
Iron (Fe), % 29.2 to 42.7
0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 33 to 37
21.5 to 22.5
Palladium (Pd), % 0
7.5 to 8.5
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.5
0
Sulfur (S), % 0 to 0.040
0
Residuals, % 0
0 to 0.15