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ASTM A387 Grade 9 Steel vs. AWS E320

Both ASTM A387 grade 9 steel and AWS E320 are iron alloys. They have 48% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, 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 E320.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 500 to 600
620

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1410
1360
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
38
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 2.1
6.5
Embodied Energy, MJ/kg 28
91
Embodied Water, L/kg 87
220

Common Calculations

PREN (Pitting Resistance) 12
28
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18 to 21
21
Strength to Weight: Bending, points 18 to 20
20
Thermal Shock Resistance, points 14 to 17
16

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.070
Chromium (Cr), % 8.0 to 10
19 to 21
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 87.1 to 90.8
31.8 to 43.5
Manganese (Mn), % 0.3 to 0.6
0.5 to 2.5
Molybdenum (Mo), % 0.9 to 1.1
2.0 to 3.0
Nickel (Ni), % 0
32 to 36
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.6
Sulfur (S), % 0 to 0.025
0 to 0.030
Vanadium (V), % 0 to 0.040
0