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AISI 201 Stainless Steel vs. AISI 418 Stainless Steel

Both AISI 201 stainless steel and AISI 418 stainless steel are iron alloys. They have 87% 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 201 stainless steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 440
330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 4.6 to 51
17
Fatigue Strength, MPa 280 to 600
520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 450 to 840
680
Tensile Strength: Ultimate (UTS), MPa 650 to 1450
1100
Tensile Strength: Yield (Proof), MPa 300 to 1080
850

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
3.1

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 61 to 340
170
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 2970
1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23 to 52
38
Strength to Weight: Bending, points 22 to 37
29
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 14 to 32
40

Alloy Composition

Carbon (C), % 0 to 0.15
0.15 to 0.2
Chromium (Cr), % 16 to 18
12 to 14
Iron (Fe), % 67.5 to 75
78.5 to 83.6
Manganese (Mn), % 5.5 to 7.5
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 3.5 to 5.5
1.8 to 2.2
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5