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EN 1.5508 Steel vs. EN 1.5503 Steel

Both EN 1.5508 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 EN 1.5508 steel and the bottom bar is EN 1.5503 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 180
120 to 160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 20
12 to 17
Fatigue Strength, MPa 210 to 320
180 to 280
Poisson's Ratio 0.29
0.29
Reduction in Area, % 62 to 74
63 to 72
Shear Modulus, GPa 73
73
Shear Strength, MPa 300 to 360
270 to 320
Tensile Strength: Ultimate (UTS), MPa 420 to 1460
400 to 520
Tensile Strength: Yield (Proof), MPa 310 to 490
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 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
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
41 to 81
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 640
200 to 490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 52
14 to 19
Strength to Weight: Bending, points 16 to 36
15 to 18
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 12 to 43
12 to 15

Alloy Composition

Boron (B), % 0.00080 to 0.0050
0.00080 to 0.0050
Carbon (C), % 0.2 to 0.25
0.16 to 0.2
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 97.9 to 99.199
98.4 to 99.239
Manganese (Mn), % 0.6 to 0.9
0.6 to 0.8
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