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ASTM A369 Grade FP21 vs. AWS BAg-20

ASTM A369 grade FP21 belongs to the iron alloys classification, while AWS BAg-20 belongs to the otherwise unclassified metals. There are 17 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP21 and the bottom bar is AWS BAg-20.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
93
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 74
35
Tensile Strength: Ultimate (UTS), MPa 470
160

Thermal Properties

Latent Heat of Fusion, J/g 260
150
Melting Completion (Liquidus), °C 1470
770
Melting Onset (Solidus), °C 1430
680
Specific Heat Capacity, J/kg-K 470
340
Thermal Expansion, µm/m-K 13
21

Otherwise Unclassified Properties

Density, g/cm3 7.8
8.6
Embodied Carbon, kg CO2/kg material 1.8
30
Embodied Energy, MJ/kg 23
480

Common Calculations

Stiffness to Weight: Axial, points 13
6.0
Stiffness to Weight: Bending, points 24
17
Strength to Weight: Axial, points 17
5.1
Strength to Weight: Bending, points 17
7.6
Thermal Shock Resistance, points 14
5.9

Alloy Composition

Carbon (C), % 0.050 to 0.15
0
Chromium (Cr), % 2.7 to 3.4
0
Copper (Cu), % 0
37 to 39
Iron (Fe), % 94.3 to 96.2
0
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.8 to 1.1
0
Phosphorus (P), % 0 to 0.025
0
Silicon (Si), % 0 to 0.5
0
Silver (Ag), % 0
29 to 31
Sulfur (S), % 0 to 0.025
0
Zinc (Zn), % 0
30 to 34
Residuals, % 0
0 to 0.15