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ASTM A182 Grade F12 Class 2 vs. AWS E320LR

Both ASTM A182 grade F12 class 2 and AWS E320LR are iron alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ASTM A182 grade F12 class 2 and the bottom bar is AWS E320LR.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 22
34
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Tensile Strength: Ultimate (UTS), MPa 540
580

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1360
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
36
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 1.6
6.2
Embodied Energy, MJ/kg 21
87
Embodied Water, L/kg 52
220

Common Calculations

PREN (Pitting Resistance) 2.8
28
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19
20
Strength to Weight: Bending, points 19
19
Thermal Shock Resistance, points 16
15

Alloy Composition

Carbon (C), % 0.1 to 0.2
0 to 0.030
Chromium (Cr), % 0.8 to 1.3
19 to 21
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 96.4 to 98.3
32.7 to 42.5
Manganese (Mn), % 0.3 to 0.8
1.5 to 2.5
Molybdenum (Mo), % 0.44 to 0.65
2.0 to 3.0
Nickel (Ni), % 0
32 to 36
Niobium (Nb), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0.1 to 0.6
0 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.015