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EN 1.5521 Steel vs. EN 1.8550 Steel

Both EN 1.5521 steel and EN 1.8550 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.5521 steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
11
Fatigue Strength, MPa 210 to 310
470
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 310 to 360
600
Tensile Strength: Ultimate (UTS), MPa 430 to 1390
1000
Tensile Strength: Yield (Proof), MPa 300 to 490
760

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.7
Embodied Energy, MJ/kg 19
23
Embodied Water, L/kg 47
67

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44 to 230
100
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 630
1550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 49
36
Strength to Weight: Bending, points 16 to 35
29
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 13 to 41
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.16 to 0.2
0.3 to 0.37
Chromium (Cr), % 0
1.5 to 1.8
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 98 to 98.9
94.4 to 96.3
Manganese (Mn), % 0.9 to 1.2
0.4 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.85 to 1.2
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.3
0 to 0.4
Sulfur (S), % 0 to 0.025
0 to 0.035