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EN 1.8550 Steel vs. EN 1.8527 Steel

Both EN 1.8550 steel and EN 1.8527 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.8550 steel and the bottom bar is EN 1.8527 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300
270
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
16
Fatigue Strength, MPa 470
520
Impact Strength: V-Notched Charpy, J 34
39
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Shear Strength, MPa 600
550
Tensile Strength: Ultimate (UTS), MPa 1000
900
Tensile Strength: Yield (Proof), MPa 760
800

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Maximum Temperature: Mechanical, °C 440
490
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
41
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
4.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.7
Embodied Energy, MJ/kg 23
23
Embodied Water, L/kg 67
66

Common Calculations

PREN (Pitting Resistance) 2.3
5.7
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
140
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
1670
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 36
32
Strength to Weight: Bending, points 29
26
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 29
26

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
0.040 to 0.12
Chromium (Cr), % 1.5 to 1.8
3.7 to 4.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 94.4 to 96.3
93.2 to 95.1
Manganese (Mn), % 0.4 to 0.7
0.85 to 1.2
Molybdenum (Mo), % 0.15 to 0.25
0.4 to 0.6
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 0.4
Sulfur (S), % 0 to 0.035
0 to 0.035