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SAE-AISI A9 Steel vs. AWS E320LR

Both SAE-AISI A9 steel and AWS E320LR are iron alloys. They have 46% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is AWS E320LR.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
580

Thermal Properties

Latent Heat of Fusion, J/g 280
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 12
14

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
36
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 4.7
6.2
Embodied Energy, MJ/kg 70
87
Embodied Water, L/kg 82
220

Common Calculations

PREN (Pitting Resistance) 10
28
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 73
20
Strength to Weight: Bending, points 24 to 46
19
Thermal Shock Resistance, points 25 to 66
15

Alloy Composition

Carbon (C), % 0.45 to 0.55
0 to 0.030
Chromium (Cr), % 4.8 to 5.5
19 to 21
Copper (Cu), % 0 to 0.25
3.0 to 4.0
Iron (Fe), % 87 to 90.5
32.7 to 42.5
Manganese (Mn), % 0 to 0.5
1.5 to 2.5
Molybdenum (Mo), % 1.3 to 1.8
2.0 to 3.0
Nickel (Ni), % 1.3 to 1.8
32 to 36
Niobium (Nb), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 1.0 to 1.2
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.8 to 1.4
0