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AISI 420F Stainless Steel vs. EN 1.4640 Stainless Steel

Both AISI 420F stainless steel and EN 1.4640 stainless steel are iron alloys. They have 84% of their average alloy composition in common.

For each property being compared, the top bar is AISI 420F stainless steel and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 18
51
Fatigue Strength, MPa 270
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 460
440 to 460
Tensile Strength: Ultimate (UTS), MPa 740
620 to 650
Tensile Strength: Yield (Proof), MPa 430
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 760
930
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1390
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
14
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
40
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 14
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 480
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
22 to 23
Strength to Weight: Bending, points 23
21
Thermal Diffusivity, mm2/s 6.8
4.0
Thermal Shock Resistance, points 27
14 to 15

Alloy Composition

Carbon (C), % 0.3 to 0.4
0.030 to 0.080
Chromium (Cr), % 12 to 14
18 to 19
Copper (Cu), % 0
1.3 to 2.0
Iron (Fe), % 82.4 to 87.6
67.4 to 73.6
Manganese (Mn), % 0 to 1.3
1.5 to 4.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0
5.5 to 6.9
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.060
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0.15 to 0.35
0 to 0.015