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EN 1.3555 Steel vs. S21800 Stainless Steel

Both EN 1.3555 steel and S21800 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 70% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is EN 1.3555 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 770
740

Thermal Properties

Latent Heat of Fusion, J/g 260
340
Maximum Temperature: Mechanical, °C 540
900
Melting Completion (Liquidus), °C 1500
1360
Melting Onset (Solidus), °C 1450
1310
Specific Heat Capacity, J/kg-K 460
500
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 11
15
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 5.6
3.1
Embodied Energy, MJ/kg 81
45
Embodied Water, L/kg 90
150

Common Calculations

PREN (Pitting Resistance) 18
19
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 27
27
Strength to Weight: Bending, points 23
24
Thermal Shock Resistance, points 22
17

Alloy Composition

Carbon (C), % 0.1 to 0.15
0 to 0.1
Chromium (Cr), % 3.9 to 4.3
16 to 18
Copper (Cu), % 0 to 0.1
0
Iron (Fe), % 85.4 to 87.7
59.1 to 65.4
Manganese (Mn), % 0.15 to 0.35
7.0 to 9.0
Molybdenum (Mo), % 4.0 to 4.5
0
Nickel (Ni), % 3.2 to 3.6
8.0 to 9.0
Nitrogen (N), % 0
0.080 to 0.18
Phosphorus (P), % 0 to 0.015
0 to 0.060
Silicon (Si), % 0.1 to 0.25
3.5 to 4.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Tungsten (W), % 0 to 0.15
0
Vanadium (V), % 1.0 to 1.3
0