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EN 1.8550 Steel vs. EN 1.5503 Steel

Both EN 1.8550 steel and EN 1.5503 steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.8550 steel and the bottom bar is EN 1.5503 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
120 to 160
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
12 to 17
Fatigue Strength, MPa 470
180 to 280
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 600
270 to 320
Tensile Strength: Ultimate (UTS), MPa 1000
400 to 520
Tensile Strength: Yield (Proof), MPa 760
270 to 430

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 40
52
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.4
Embodied Energy, MJ/kg 23
18
Embodied Water, L/kg 67
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
41 to 81
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
200 to 490
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 36
14 to 19
Strength to Weight: Bending, points 29
15 to 18
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 29
12 to 15

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.3 to 0.37
0.16 to 0.2
Chromium (Cr), % 1.5 to 1.8
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96.3
98.4 to 99.239
Manganese (Mn), % 0.4 to 0.7
0.6 to 0.8
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.85 to 1.2
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.3
Sulfur (S), % 0 to 0.035
0 to 0.025