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S21800 Stainless Steel vs. AISI 403 Stainless Steel

Both S21800 stainless steel and AISI 403 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is AISI 403 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
190 to 240
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 40
16 to 25
Fatigue Strength, MPa 330
200 to 340
Poisson's Ratio 0.28
0.28
Reduction in Area, % 62
47 to 50
Rockwell B Hardness 88
83
Shear Modulus, GPa 75
76
Shear Strength, MPa 510
340 to 480
Tensile Strength: Ultimate (UTS), MPa 740
530 to 780
Tensile Strength: Yield (Proof), MPa 390
280 to 570

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 900
740
Melting Completion (Liquidus), °C 1360
1450
Melting Onset (Solidus), °C 1310
1400
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
6.5
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.9
Embodied Energy, MJ/kg 45
27
Embodied Water, L/kg 150
99

Common Calculations

PREN (Pitting Resistance) 19
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 390
210 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
19 to 28
Strength to Weight: Bending, points 24
19 to 24
Thermal Shock Resistance, points 17
20 to 29

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.15
Chromium (Cr), % 16 to 18
11.5 to 13
Iron (Fe), % 59.1 to 65.4
84.7 to 88.5
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Nickel (Ni), % 8.0 to 9.0
0 to 0.6
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 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030