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EN 1.7218 Steel vs. AISI 420 Stainless Steel

Both EN 1.7218 steel and AISI 420 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.7218 steel and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150 to 230
190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 500 to 1550
690 to 1720

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
620
Melting Completion (Liquidus), °C 1460
1510
Melting Onset (Solidus), °C 1420
1450
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 44
27
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.0
Embodied Energy, MJ/kg 20
28
Embodied Water, L/kg 52
100

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18 to 55
25 to 62
Strength to Weight: Bending, points 18 to 38
22 to 41
Thermal Diffusivity, mm2/s 12
7.3
Thermal Shock Resistance, points 15 to 46
25 to 62

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.22 to 0.29
0.15 to 0.4
Chromium (Cr), % 0.9 to 1.2
12 to 14
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 96.2 to 98.1
82.3 to 87.9
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.3
0 to 0.5
Nickel (Ni), % 0 to 0.3
0 to 0.75
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.030

Comparable Variants