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EN 1.4109 Stainless Steel vs. EN 1.7218 Steel

Both EN 1.4109 stainless steel and EN 1.7218 steel are iron alloys. They have 85% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.4109 stainless steel and the bottom bar is EN 1.7218 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
150 to 230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Tensile Strength: Ultimate (UTS), MPa 770
500 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 820
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 30
44
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
2.6
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.5
Embodied Energy, MJ/kg 30
20
Embodied Water, L/kg 110
52

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
18 to 55
Strength to Weight: Bending, points 24
18 to 38
Thermal Diffusivity, mm2/s 8.1
12
Thermal Shock Resistance, points 28
15 to 46

Alloy Composition

Aluminum (Al), % 0
0 to 0.040
Carbon (C), % 0.6 to 0.75
0.22 to 0.29
Chromium (Cr), % 14 to 16
0.9 to 1.2
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 80.7 to 85
96.2 to 98.1
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Molybdenum (Mo), % 0.4 to 0.8
0.15 to 0.3
Nickel (Ni), % 0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 0.7
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035