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AWS E309Nb vs. S21800 Stainless Steel

Both AWS E309Nb and S21800 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is AWS E309Nb and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
40
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Tensile Strength: Ultimate (UTS), MPa 620
740

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Melting Completion (Liquidus), °C 1420
1360
Melting Onset (Solidus), °C 1380
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 14
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 4.4
3.1
Embodied Energy, MJ/kg 64
45
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 25
19
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 22
27
Strength to Weight: Bending, points 21
24
Thermal Shock Resistance, points 16
17

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.1
Chromium (Cr), % 22 to 25
16 to 18
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 54.8 to 64.8
59.1 to 65.4
Manganese (Mn), % 0.5 to 2.5
7.0 to 9.0
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 12 to 14
8.0 to 9.0
Niobium (Nb), % 0.7 to 1.0
0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030