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AISI 420 Stainless Steel vs. EN 1.6781 Steel

Both AISI 420 stainless steel and EN 1.6781 steel are iron alloys. They have 88% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 1.6781 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
250
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0 to 15
17
Fatigue Strength, MPa 220 to 670
450
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
830
Tensile Strength: Yield (Proof), MPa 380 to 1310
680

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Maximum Temperature: Mechanical, °C 620
450
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
44
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
5.0
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.0
1.9
Embodied Energy, MJ/kg 28
25
Embodied Water, L/kg 100
60

Common Calculations

PREN (Pitting Resistance) 14
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
130
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
1220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
29
Strength to Weight: Bending, points 22 to 41
25
Thermal Diffusivity, mm2/s 7.3
12
Thermal Shock Resistance, points 25 to 62
24

Alloy Composition

Carbon (C), % 0.15 to 0.4
0.15 to 0.19
Chromium (Cr), % 12 to 14
1.3 to 1.8
Iron (Fe), % 82.3 to 87.9
92.6 to 94.6
Manganese (Mn), % 0 to 1.0
0.55 to 0.8
Molybdenum (Mo), % 0 to 0.5
0.45 to 0.6
Nickel (Ni), % 0 to 0.75
3.0 to 3.5
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015