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S21800 Stainless Steel vs. AISI 303Se Stainless Steel

Both S21800 stainless steel and AISI 303Se stainless steel are iron alloys. Both are furnished in the annealed condition. They have 89% of their average alloy composition in common. There are 30 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 S21800 stainless steel and the bottom bar is AISI 303Se stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
45
Fatigue Strength, MPa 330
210
Poisson's Ratio 0.28
0.28
Reduction in Area, % 62
57
Shear Modulus, GPa 75
77
Shear Strength, MPa 510
410
Tensile Strength: Ultimate (UTS), MPa 740
590
Tensile Strength: Yield (Proof), MPa 390
230

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 900
930
Melting Completion (Liquidus), °C 1360
1420
Melting Onset (Solidus), °C 1310
1380
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 15
16
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.0
Embodied Energy, MJ/kg 45
42
Embodied Water, L/kg 150
140

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
210
Resilience: Unit (Modulus of Resilience), kJ/m3 390
130
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
21
Strength to Weight: Bending, points 24
20
Thermal Shock Resistance, points 17
13

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 16 to 18
17 to 19
Iron (Fe), % 59.1 to 65.4
67.2 to 74.9
Manganese (Mn), % 7.0 to 9.0
0 to 2.0
Nickel (Ni), % 8.0 to 9.0
8.0 to 10
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.2
Selenium (Se), % 0
0.15 to 0.35
Silicon (Si), % 3.5 to 4.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.060