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EN 1.5521 Steel vs. SAE-AISI 1018 Steel

Both EN 1.5521 steel and SAE-AISI 1018 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 SAE-AISI 1018 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
17 to 27
Fatigue Strength, MPa 210 to 310
180 to 270
Poisson's Ratio 0.29
0.29
Reduction in Area, % 59 to 72
45 to 57
Shear Modulus, GPa 73
73
Shear Strength, MPa 310 to 360
280 to 300
Tensile Strength: Ultimate (UTS), MPa 430 to 1390
430 to 480
Tensile Strength: Yield (Proof), MPa 300 to 490
240 to 400

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
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 19
18
Embodied Water, L/kg 47
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 44 to 230
75 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 630
150 to 430
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 49
15 to 17
Strength to Weight: Bending, points 16 to 35
16 to 17
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 13 to 41
14 to 15

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.16 to 0.2
0.15 to 0.2
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 98 to 98.9
98.8 to 99.25
Manganese (Mn), % 0.9 to 1.2
0.6 to 0.9
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.3
0
Sulfur (S), % 0 to 0.025
0 to 0.050

Comparable Variants