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S21800 Stainless Steel vs. AWS E320

Both S21800 stainless steel and AWS E320 are iron alloys. They have 65% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is AWS E320.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 740
620

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Melting Completion (Liquidus), °C 1360
1410
Melting Onset (Solidus), °C 1310
1360
Specific Heat Capacity, J/kg-K 500
460
Thermal Expansion, µm/m-K 16
14

Otherwise Unclassified Properties

Base Metal Price, % relative 15
38
Density, g/cm3 7.5
8.2
Embodied Carbon, kg CO2/kg material 3.1
6.5
Embodied Energy, MJ/kg 45
91
Embodied Water, L/kg 150
220

Common Calculations

PREN (Pitting Resistance) 19
28
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 27
21
Strength to Weight: Bending, points 24
20
Thermal Shock Resistance, points 17
16

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.070
Chromium (Cr), % 16 to 18
19 to 21
Copper (Cu), % 0
3.0 to 4.0
Iron (Fe), % 59.1 to 65.4
31.8 to 43.5
Manganese (Mn), % 7.0 to 9.0
0.5 to 2.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 8.0 to 9.0
32 to 36
Niobium (Nb), % 0
0 to 1.0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 3.5 to 4.5
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030