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AISI 201LN Stainless Steel vs. AISI 440A Stainless Steel

Both AISI 201LN stainless steel and AISI 440A stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 201LN stainless steel and the bottom bar is AISI 440A stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25 to 51
5.0 to 20
Fatigue Strength, MPa 340 to 540
270 to 790
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 530 to 680
450 to 1040
Tensile Strength: Ultimate (UTS), MPa 740 to 1060
730 to 1790
Tensile Strength: Yield (Proof), MPa 350 to 770
420 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
400
Maximum Temperature: Mechanical, °C 880
760
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
23
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.2
Embodied Energy, MJ/kg 38
31
Embodied Water, L/kg 140
120

Common Calculations

PREN (Pitting Resistance) 20
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230 to 310
87 to 120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 38
26 to 65
Strength to Weight: Bending, points 24 to 30
23 to 43
Thermal Diffusivity, mm2/s 4.0
6.2
Thermal Shock Resistance, points 16 to 23
26 to 65

Alloy Composition

Carbon (C), % 0 to 0.030
0.6 to 0.75
Chromium (Cr), % 16 to 17.5
16 to 18
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 67.9 to 73.5
78.4 to 83.4
Manganese (Mn), % 6.4 to 7.5
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 4.0 to 5.0
0
Nitrogen (N), % 0.1 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.015

Comparable Variants