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S35500 Stainless Steel vs. S21800 Stainless Steel

Both S35500 stainless steel and S21800 stainless steel are iron alloys. They have 84% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is S35500 stainless steel 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, % 14
40
Fatigue Strength, MPa 690 to 730
330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Shear Strength, MPa 810 to 910
510
Tensile Strength: Ultimate (UTS), MPa 1330 to 1490
740
Tensile Strength: Yield (Proof), MPa 1200 to 1280
390

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Corrosion, °C 440
410
Maximum Temperature: Mechanical, °C 870
900
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 16
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 3.5
3.1
Embodied Energy, MJ/kg 47
45
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 27
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180 to 190
250
Resilience: Unit (Modulus of Resilience), kJ/m3 3610 to 4100
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 47 to 53
27
Strength to Weight: Bending, points 34 to 37
24
Thermal Shock Resistance, points 44 to 49
17

Alloy Composition

Carbon (C), % 0.1 to 0.15
0 to 0.1
Chromium (Cr), % 15 to 16
16 to 18
Iron (Fe), % 73.2 to 77.7
59.1 to 65.4
Manganese (Mn), % 0.5 to 1.3
7.0 to 9.0
Molybdenum (Mo), % 2.5 to 3.2
0
Nickel (Ni), % 4.0 to 5.0
8.0 to 9.0
Niobium (Nb), % 0.1 to 0.5
0
Nitrogen (N), % 0.070 to 0.13
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 0.5
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030