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EN 1.8880 Steel vs. EN 1.8550 Steel

Both EN 1.8880 steel and EN 1.8550 steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 98% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.8880 steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
11
Fatigue Strength, MPa 470
470
Impact Strength: V-Notched Charpy, J 68
34
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 510
600
Tensile Strength: Ultimate (UTS), MPa 830
1000
Tensile Strength: Yield (Proof), MPa 720
760

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 420
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 3.7
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.9
1.7
Embodied Energy, MJ/kg 26
23
Embodied Water, L/kg 54
67

Common Calculations

PREN (Pitting Resistance) 2.0
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
100
Resilience: Unit (Modulus of Resilience), kJ/m3 1370
1550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
36
Strength to Weight: Bending, points 25
29
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 24
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Boron (B), % 0 to 0.0050
0
Carbon (C), % 0 to 0.2
0.3 to 0.37
Chromium (Cr), % 0 to 1.5
1.5 to 1.8
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 91.9 to 100
94.4 to 96.3
Manganese (Mn), % 0 to 1.7
0.4 to 0.7
Molybdenum (Mo), % 0 to 0.7
0.15 to 0.25
Nickel (Ni), % 0 to 2.5
0.85 to 1.2
Niobium (Nb), % 0 to 0.060
0
Nitrogen (N), % 0 to 0.015
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.8
0 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.035
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0 to 0.12
0
Zirconium (Zr), % 0 to 0.15
0