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ASTM A387 Grade 9 Steel vs. AWS BVAg-31

ASTM A387 grade 9 steel belongs to the iron alloys classification, while AWS BVAg-31 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 ASTM A387 grade 9 steel and the bottom bar is AWS BVAg-31.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
90
Poisson's Ratio 0.28
0.36
Shear Modulus, GPa 75
33
Tensile Strength: Ultimate (UTS), MPa 500 to 600
180

Thermal Properties

Latent Heat of Fusion, J/g 270
150
Melting Completion (Liquidus), °C 1460
850
Melting Onset (Solidus), °C 1410
820
Specific Heat Capacity, J/kg-K 470
280
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Density, g/cm3 7.8
10

Common Calculations

Stiffness to Weight: Axial, points 14
4.9
Stiffness to Weight: Bending, points 25
15
Strength to Weight: Axial, points 18 to 21
4.9
Strength to Weight: Bending, points 18 to 20
7.0
Thermal Shock Resistance, points 14 to 17
7.8

Alloy Composition

Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0 to 0.15
0 to 0.0050
Chromium (Cr), % 8.0 to 10
0
Copper (Cu), % 0
31 to 33
Iron (Fe), % 87.1 to 90.8
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.9 to 1.1
0
Palladium (Pd), % 0
8.0 to 12
Phosphorus (P), % 0 to 0.025
0 to 0.0020
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
57 to 59
Sulfur (S), % 0 to 0.025
0
Vanadium (V), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.0010