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S33228 Stainless Steel vs. S21800 Stainless Steel

Both S33228 stainless steel and S21800 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 66% of their average alloy composition in common.

For each property being compared, the top bar is S33228 stainless steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
40
Fatigue Strength, MPa 170
330
Poisson's Ratio 0.28
0.28
Reduction in Area, % 39
62
Rockwell B Hardness 82
88
Shear Modulus, GPa 79
75
Shear Strength, MPa 380
510
Tensile Strength: Ultimate (UTS), MPa 570
740
Tensile Strength: Yield (Proof), MPa 210
390

Thermal Properties

Latent Heat of Fusion, J/g 310
340
Maximum Temperature: Corrosion, °C 560
410
Maximum Temperature: Mechanical, °C 1100
900
Melting Completion (Liquidus), °C 1410
1360
Melting Onset (Solidus), °C 1360
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 37
15
Density, g/cm3 8.0
7.5
Embodied Carbon, kg CO2/kg material 6.2
3.1
Embodied Energy, MJ/kg 89
45
Embodied Water, L/kg 220
150

Common Calculations

PREN (Pitting Resistance) 27
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
250
Resilience: Unit (Modulus of Resilience), kJ/m3 110
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 20
27
Strength to Weight: Bending, points 19
24
Thermal Shock Resistance, points 13
17

Alloy Composition

Aluminum (Al), % 0 to 0.025
0
Carbon (C), % 0.040 to 0.080
0 to 0.1
Cerium (Ce), % 0.050 to 0.1
0
Chromium (Cr), % 26 to 28
16 to 18
Iron (Fe), % 36.5 to 42.3
59.1 to 65.4
Manganese (Mn), % 0 to 1.0
7.0 to 9.0
Nickel (Ni), % 31 to 33
8.0 to 9.0
Niobium (Nb), % 0.6 to 1.0
0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.020
0 to 0.060
Silicon (Si), % 0 to 0.3
3.5 to 4.5
Sulfur (S), % 0 to 0.015
0 to 0.030