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EN 1.4008 Stainless Steel vs. AISI 420 Stainless Steel

Both EN 1.4008 stainless steel and AISI 420 stainless steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.4008 stainless steel and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
8.0 to 15
Fatigue Strength, MPa 300
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 670
690 to 1720
Tensile Strength: Yield (Proof), MPa 500
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 760
620
Melting Completion (Liquidus), °C 1450
1510
Melting Onset (Solidus), °C 1400
1450
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
27
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.1
2.0
Embodied Energy, MJ/kg 30
28
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 14
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 630
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
25 to 62
Strength to Weight: Bending, points 22
22 to 41
Thermal Diffusivity, mm2/s 6.7
7.3
Thermal Shock Resistance, points 23
25 to 62

Alloy Composition

Carbon (C), % 0 to 0.1
0.15 to 0.4
Chromium (Cr), % 12 to 13.5
12 to 14
Iron (Fe), % 81.8 to 86.8
82.3 to 87.9
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.2 to 0.5
0 to 0.5
Nickel (Ni), % 1.0 to 2.0
0 to 0.75
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030