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AWS ER70S-A1 vs. AWS ER80S-B6

Both AWS ER70S-A1 and AWS ER80S-B6 are iron alloys. Both are furnished in the post-weld heat treated (PWHT) condition. They have a moderately high 95% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AWS ER70S-A1 and the bottom bar is AWS ER80S-B6.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 22
19
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 590
620
Tensile Strength: Yield (Proof), MPa 450
540

Thermal Properties

Latent Heat of Fusion, J/g 260
260
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.5
4.7
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.8
Embodied Energy, MJ/kg 20
24
Embodied Water, L/kg 48
71

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 540
750
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 17
18

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.1
Chromium (Cr), % 0
4.5 to 6.0
Copper (Cu), % 0 to 0.35
0 to 0.35
Iron (Fe), % 96.1 to 99.3
90.6 to 94.7
Manganese (Mn), % 0 to 1.3
0.4 to 0.7
Molybdenum (Mo), % 0.4 to 0.65
0.45 to 0.65
Nickel (Ni), % 0 to 0.2
0 to 0.6
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0.3 to 0.7
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.025
Residuals, % 0
0 to 0.5