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EN 1.5521 Steel vs. SAE-AISI 1045 Steel

Both EN 1.5521 steel and SAE-AISI 1045 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 1045 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 21
13 to 18
Fatigue Strength, MPa 210 to 310
220 to 370
Poisson's Ratio 0.29
0.29
Reduction in Area, % 59 to 72
40 to 51
Shear Modulus, GPa 73
72
Shear Strength, MPa 310 to 360
380 to 410
Tensile Strength: Ultimate (UTS), MPa 430 to 1390
620 to 680
Tensile Strength: Yield (Proof), MPa 300 to 490
330 to 580

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
51
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
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
1.8
Density, g/cm3 7.8
7.8
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
84 to 93
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 630
300 to 900
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 49
22 to 24
Strength to Weight: Bending, points 16 to 35
21 to 22
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 13 to 41
20 to 22

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0
Carbon (C), % 0.16 to 0.2
0.43 to 0.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 98 to 98.9
98.5 to 99
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