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AISI 201LN Stainless Steel vs. AISI 420F Stainless Steel

Both AISI 201LN stainless steel and AISI 420F stainless steel are iron alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is AISI 201LN stainless steel and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 320
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 25 to 51
18
Fatigue Strength, MPa 340 to 540
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 530 to 680
460
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
740
Tensile Strength: Yield (Proof), MPa 350 to 770
430

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 410
390
Maximum Temperature: Mechanical, °C 880
760
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1370
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
7.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.0
Embodied Energy, MJ/kg 38
28
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 20
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
120
Resilience: Unit (Modulus of Resilience), kJ/m3 310 to 1520
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 38
27
Strength to Weight: Bending, points 24 to 30
23
Thermal Diffusivity, mm2/s 4.0
6.8
Thermal Shock Resistance, points 16 to 23
27

Alloy Composition

Carbon (C), % 0 to 0.030
0.3 to 0.4
Chromium (Cr), % 16 to 17.5
12 to 14
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 67.9 to 73.5
82.4 to 87.6
Manganese (Mn), % 6.4 to 7.5
0 to 1.3
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 4.0 to 5.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35