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EN 1.5521 Steel vs. S21800 Stainless Steel

Both EN 1.5521 steel and S21800 stainless steel are iron alloys. They have 64% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.5521 steel and the bottom bar is S21800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
40
Fatigue Strength, MPa 210 to 310
330
Poisson's Ratio 0.29
0.28
Reduction in Area, % 59 to 72
62
Shear Modulus, GPa 73
75
Shear Strength, MPa 310 to 360
510
Tensile Strength: Ultimate (UTS), MPa 430 to 1390
740
Tensile Strength: Yield (Proof), MPa 300 to 490
390

Thermal Properties

Latent Heat of Fusion, J/g 250
340
Maximum Temperature: Mechanical, °C 400
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 1.9
15
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.4
3.1
Embodied Energy, MJ/kg 19
45
Embodied Water, L/kg 47
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44 to 230
250
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 630
390
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
26
Strength to Weight: Axial, points 15 to 49
27
Strength to Weight: Bending, points 16 to 35
24
Thermal Shock Resistance, points 13 to 41
17

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.16 to 0.2
0 to 0.1
Chromium (Cr), % 0
16 to 18
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 98 to 98.9
59.1 to 65.4
Manganese (Mn), % 0.9 to 1.2
7.0 to 9.0
Nickel (Ni), % 0
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