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AISI 420 Stainless Steel vs. EN 1.4640 Stainless Steel

Both AISI 420 stainless steel and EN 1.4640 stainless steel are iron alloys. They have 85% 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 420 stainless steel and the bottom bar is EN 1.4640 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
51
Fatigue Strength, MPa 220 to 670
230 to 250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 420 to 1010
440 to 460
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
620 to 650
Tensile Strength: Yield (Proof), MPa 380 to 1310
240 to 260

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 620
930
Melting Completion (Liquidus), °C 1510
1420
Melting Onset (Solidus), °C 1450
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
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 88 to 130
250 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
150 to 170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
22 to 23
Strength to Weight: Bending, points 22 to 41
21
Thermal Diffusivity, mm2/s 7.3
4.0
Thermal Shock Resistance, points 25 to 62
14 to 15

Alloy Composition

Carbon (C), % 0.15 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), % 82.3 to 87.9
67.4 to 73.6
Manganese (Mn), % 0 to 1.0
1.5 to 4.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
5.5 to 6.9
Nitrogen (N), % 0
0.030 to 0.11
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015