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SAE-AISI 1055 Steel vs. EN 1.5503 Steel

Both SAE-AISI 1055 steel and EN 1.5503 steel are iron alloys. Their average alloy composition is basically identical.

For each property being compared, the top bar is SAE-AISI 1055 steel and the bottom bar is EN 1.5503 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
120 to 160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 14
12 to 17
Fatigue Strength, MPa 260 to 390
180 to 280
Poisson's Ratio 0.29
0.29
Reduction in Area, % 34 to 45
63 to 72
Shear Modulus, GPa 72
73
Shear Strength, MPa 440 to 450
270 to 320
Tensile Strength: Ultimate (UTS), MPa 730 to 750
400 to 520
Tensile Strength: Yield (Proof), MPa 400 to 630
270 to 430

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 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.1

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 85
41 to 81
Resilience: Unit (Modulus of Resilience), kJ/m3 440 to 1070
200 to 490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
14 to 19
Strength to Weight: Bending, points 23
15 to 18
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 23 to 24
12 to 15

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.5 to 0.6
0.16 to 0.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 98.4 to 98.9
98.4 to 99.239
Manganese (Mn), % 0.6 to 0.9
0.6 to 0.8
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0
0 to 0.3
Sulfur (S), % 0 to 0.050
0 to 0.025

Comparable Variants