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EN 1.5918 Steel vs. S21800 Stainless Steel

Both EN 1.5918 steel and S21800 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.

For each property being compared, the top bar is EN 1.5918 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 190
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 530 to 1390
740

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 440
900
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1420
1310
Specific Heat Capacity, J/kg-K 470
500
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
15
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 1.6
3.1
Embodied Energy, MJ/kg 21
45
Embodied Water, L/kg 56
150

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 19 to 49
27
Strength to Weight: Bending, points 18 to 35
24
Thermal Shock Resistance, points 15 to 41
17

Alloy Composition

Carbon (C), % 0.14 to 0.2
0 to 0.1
Chromium (Cr), % 1.4 to 1.7
16 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 94.9 to 96.6
59.1 to 65.4
Manganese (Mn), % 0.5 to 0.9
7.0 to 9.0
Nickel (Ni), % 1.4 to 1.7
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.025
0 to 0.060
Silicon (Si), % 0 to 0.3
3.5 to 4.5
Sulfur (S), % 0 to 0.025
0 to 0.030