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EN 1.4371 Stainless Steel vs. AISI 418 Stainless Steel

Both EN 1.4371 stainless steel and AISI 418 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 EN 1.4371 stainless steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 230
330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45 to 51
17
Fatigue Strength, MPa 290 to 340
520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 520 to 540
680
Tensile Strength: Ultimate (UTS), MPa 740 to 750
1100
Tensile Strength: Yield (Proof), MPa 320 to 340
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) 20
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270 to 310
170
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 300
1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
38
Strength to Weight: Bending, points 24
29
Thermal Diffusivity, mm2/s 4.0
6.7
Thermal Shock Resistance, points 16
40

Alloy Composition

Carbon (C), % 0 to 0.030
0.15 to 0.2
Chromium (Cr), % 16 to 17.5
12 to 14
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 66.7 to 74.4
78.5 to 83.6
Manganese (Mn), % 6.0 to 8.0
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), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5