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AWS ER80S-B3L vs. ASTM A387 Grade 21 Steel

Both AWS ER80S-B3L and ASTM A387 grade 21 steel are iron alloys. Their average alloy composition is basically identical. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS ER80S-B3L and the bottom bar is ASTM A387 grade 21 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
21
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
74
Tensile Strength: Ultimate (UTS), MPa 630
500 to 590
Tensile Strength: Yield (Proof), MPa 530
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 41
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 4.1
4.1
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.8
1.8
Embodied Energy, MJ/kg 23
23
Embodied Water, L/kg 60
62

Common Calculations

PREN (Pitting Resistance) 6.0
6.4
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 730
140 to 320
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
18 to 21
Strength to Weight: Bending, points 21
18 to 20
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 18
14 to 17

Alloy Composition


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Carbon (C), % 0 to 0.050
0.050 to 0.15
Chromium (Cr), % 2.3 to 2.7
2.8 to 3.3
Copper (Cu), % 0 to 0.35
0
Iron (Fe), % 93.6 to 96
94.4 to 96
Manganese (Mn), % 0.4 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.2
0.9 to 1.1
Nickel (Ni), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.4 to 0.7
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.025
Residuals, % 0 to 0.5
0