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S20910 Stainless Steel vs. S21800 Stainless Steel

Both S20910 stainless steel and S21800 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is S20910 stainless steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230 to 290
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 39
40
Fatigue Strength, MPa 310 to 460
330
Poisson's Ratio 0.28
0.28
Reduction in Area, % 56 to 62
62
Shear Modulus, GPa 79
75
Shear Strength, MPa 500 to 570
510
Tensile Strength: Ultimate (UTS), MPa 780 to 940
740
Tensile Strength: Yield (Proof), MPa 430 to 810
390

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Maximum Temperature: Corrosion, °C 460
410
Maximum Temperature: Mechanical, °C 1080
900
Melting Completion (Liquidus), °C 1420
1360
Melting Onset (Solidus), °C 1380
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 22
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 4.8
3.1
Embodied Energy, MJ/kg 68
45
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 34
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 260
250
Resilience: Unit (Modulus of Resilience), kJ/m3 460 to 1640
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 28 to 33
27
Strength to Weight: Bending, points 24 to 27
24
Thermal Shock Resistance, points 17 to 21
17

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.1
Chromium (Cr), % 20.5 to 23.5
16 to 18
Iron (Fe), % 52.1 to 62.1
59.1 to 65.4
Manganese (Mn), % 4.0 to 6.0
7.0 to 9.0
Molybdenum (Mo), % 1.5 to 3.0
0
Nickel (Ni), % 11.5 to 13.5
8.0 to 9.0
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0.080 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 0.75
3.5 to 4.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0