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ASTM A387 Grade 21 Steel vs. AWS BVAg-0

ASTM A387 grade 21 steel belongs to the iron alloys classification, while AWS BVAg-0 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 21 steel and the bottom bar is AWS BVAg-0.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Poisson's Ratio 0.29
0.37
Shear Modulus, GPa 74
26
Tensile Strength: Ultimate (UTS), MPa 500 to 590
130

Thermal Properties

Latent Heat of Fusion, J/g 260
110
Melting Completion (Liquidus), °C 1470
960
Melting Onset (Solidus), °C 1430
960
Specific Heat Capacity, J/kg-K 470
240
Thermal Expansion, µm/m-K 13
20

Otherwise Unclassified Properties

Density, g/cm3 7.9
10

Common Calculations

Stiffness to Weight: Axial, points 13
3.8
Stiffness to Weight: Bending, points 24
13
Strength to Weight: Axial, points 18 to 21
3.4
Strength to Weight: Bending, points 18 to 20
5.4
Thermal Shock Resistance, points 14 to 17
6.6

Alloy Composition

Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0.050 to 0.15
0 to 0.0050
Chromium (Cr), % 2.8 to 3.3
0
Copper (Cu), % 0
0 to 0.050
Iron (Fe), % 94.4 to 96
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.9 to 1.1
0
Phosphorus (P), % 0 to 0.025
0 to 0.0020
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
99.95 to 100
Sulfur (S), % 0 to 0.025
0
Zinc (Zn), % 0
0 to 0.0010