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AISI 201LN Stainless Steel vs. S21800 Stainless Steel

Both AISI 201LN stainless steel and S21800 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 29 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 AISI 201LN stainless steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25 to 51
40
Fatigue Strength, MPa 340 to 540
330
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Shear Strength, MPa 530 to 680
510
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
740
Tensile Strength: Yield (Proof), MPa 350 to 770
390

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 880
900
Melting Completion (Liquidus), °C 1410
1360
Melting Onset (Solidus), °C 1370
1310
Specific Heat Capacity, J/kg-K 480
500
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
15
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 2.6
3.1
Embodied Energy, MJ/kg 38
45
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 20
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
250
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 27 to 38
27
Strength to Weight: Bending, points 24 to 30
24
Thermal Shock Resistance, points 16 to 23
17

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 16 to 17.5
16 to 18
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 67.9 to 73.5
59.1 to 65.4
Manganese (Mn), % 6.4 to 7.5
7.0 to 9.0
Nickel (Ni), % 4.0 to 5.0
8.0 to 9.0
Nitrogen (N), % 0.1 to 0.25
0.080 to 0.18
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.75
3.5 to 4.5
Sulfur (S), % 0 to 0.015
0 to 0.030