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S35000 Stainless Steel vs. S21800 Stainless Steel

Both S35000 stainless steel and S21800 stainless steel are iron alloys. They have 85% 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 S35000 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, % 2.3 to 14
40
Fatigue Strength, MPa 380 to 520
330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
75
Shear Strength, MPa 740 to 950
510
Tensile Strength: Ultimate (UTS), MPa 1300 to 1570
740
Tensile Strength: Yield (Proof), MPa 660 to 1160
390

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 900
900
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1410
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 14
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 3.2
3.1
Embodied Energy, MJ/kg 44
45
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 28
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 28 to 170
250
Resilience: Unit (Modulus of Resilience), kJ/m3 1070 to 3360
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 46 to 56
27
Strength to Weight: Bending, points 34 to 38
24
Thermal Shock Resistance, points 42 to 51
17

Alloy Composition

Carbon (C), % 0.070 to 0.11
0 to 0.1
Chromium (Cr), % 16 to 17
16 to 18
Iron (Fe), % 72.7 to 76.9
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
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