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AISI 418 Stainless Steel vs. AISI 201LN Stainless Steel

Both AISI 418 stainless steel and AISI 201LN stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is AISI 201LN stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
210 to 320
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
25 to 51
Fatigue Strength, MPa 520
340 to 540
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 680
530 to 680
Tensile Strength: Ultimate (UTS), MPa 1100
740 to 1060
Tensile Strength: Yield (Proof), MPa 850
350 to 770

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
410
Maximum Temperature: Mechanical, °C 770
880
Melting Completion (Liquidus), °C 1500
1410
Melting Onset (Solidus), °C 1460
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
12
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 2.9
2.6
Embodied Energy, MJ/kg 41
38
Embodied Water, L/kg 110
140

Common Calculations

PREN (Pitting Resistance) 19
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
230 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
310 to 1520
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 38
27 to 38
Strength to Weight: Bending, points 29
24 to 30
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 40
16 to 23

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.030
Chromium (Cr), % 12 to 14
16 to 17.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 78.5 to 83.6
67.9 to 73.5
Manganese (Mn), % 0 to 0.5
6.4 to 7.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
4.0 to 5.0
Nitrogen (N), % 0
0.1 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 2.5 to 3.5
0