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S20161 Stainless Steel vs. S21800 Stainless Steel

Both S20161 stainless steel and S21800 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 92% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S20161 stainless steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 46
40
Fatigue Strength, MPa 360
330
Poisson's Ratio 0.28
0.28
Reduction in Area, % 45
62
Shear Modulus, GPa 76
75
Shear Strength, MPa 690
510
Tensile Strength: Ultimate (UTS), MPa 980
740
Tensile Strength: Yield (Proof), MPa 390
390

Thermal Properties

Latent Heat of Fusion, J/g 330
340
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 870
900
Melting Completion (Liquidus), °C 1380
1360
Melting Onset (Solidus), °C 1330
1310
Specific Heat Capacity, J/kg-K 490
500
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 7.5
7.5
Embodied Carbon, kg CO2/kg material 2.7
3.1
Embodied Energy, MJ/kg 39
45
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 360
250
Resilience: Unit (Modulus of Resilience), kJ/m3 390
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
26
Strength to Weight: Axial, points 36
27
Strength to Weight: Bending, points 29
24
Thermal Shock Resistance, points 22
17

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.1
Chromium (Cr), % 15 to 18
16 to 18
Iron (Fe), % 65.6 to 73.9
59.1 to 65.4
Manganese (Mn), % 4.0 to 6.0
7.0 to 9.0
Nickel (Ni), % 4.0 to 6.0
8.0 to 9.0
Nitrogen (N), % 0.080 to 0.2
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 3.0 to 4.0
3.5 to 4.5
Sulfur (S), % 0 to 0.040
0 to 0.030