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EN 1.5521 Steel vs. EN 1.5520 Steel

Both EN 1.5521 steel and EN 1.5520 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.5521 steel and the bottom bar is EN 1.5520 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
120 to 170
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
11 to 21
Fatigue Strength, MPa 210 to 310
210 to 300
Poisson's Ratio 0.29
0.29
Reduction in Area, % 59 to 72
62 to 75
Shear Modulus, GPa 73
73
Shear Strength, MPa 310 to 360
290 to 340
Tensile Strength: Ultimate (UTS), MPa 430 to 1390
410 to 1410
Tensile Strength: Yield (Proof), MPa 300 to 490
300 to 480

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
50
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
19
Embodied Water, L/kg 47
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44 to 230
42 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 630
240 to 600
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 49
15 to 50
Strength to Weight: Bending, points 16 to 35
16 to 36
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 13 to 41
12 to 41

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0.00080 to 0.0050
Carbon (C), % 0.16 to 0.2
0.15 to 0.2
Chromium (Cr), % 0
0 to 0.3
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 98 to 98.9
97.7 to 98.9
Manganese (Mn), % 0.9 to 1.2
0.9 to 1.2
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.3
0 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.025

Comparable Variants