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S21904 Stainless Steel vs. AWS ER80S-B8

Both S21904 stainless steel and AWS ER80S-B8 are iron alloys. They have 74% of their average alloy composition in common. There are 28 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 S21904 stainless steel and the bottom bar is AWS ER80S-B8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17 to 51
19
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
630
Tensile Strength: Yield (Proof), MPa 390 to 910
530

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
26
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.0
Embodied Energy, MJ/kg 43
28
Embodied Water, L/kg 160
89

Common Calculations

PREN (Pitting Resistance) 25
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
120
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
720
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 36
22
Strength to Weight: Bending, points 23 to 29
21
Thermal Diffusivity, mm2/s 3.8
6.9
Thermal Shock Resistance, points 15 to 21
17

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.1
Chromium (Cr), % 19 to 21.5
8.0 to 10.5
Copper (Cu), % 0
0 to 0.35
Iron (Fe), % 59.5 to 67.4
85.6 to 90.8
Manganese (Mn), % 8.0 to 10
0.4 to 0.7
Molybdenum (Mo), % 0
0.8 to 1.2
Nickel (Ni), % 5.5 to 7.5
0 to 0.5
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Residuals, % 0
0 to 0.5