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EN 1.3551 Steel vs. EN 1.8550 Steel

Both EN 1.3551 steel and EN 1.8550 steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is EN 1.3551 steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 720
1000

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 530
440
Melting Completion (Liquidus), °C 1490
1450
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 460
480
Thermal Conductivity, W/m-K 36
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.6
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 9.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
3.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.9
1.7
Embodied Energy, MJ/kg 71
23
Embodied Water, L/kg 82
67

Common Calculations

PREN (Pitting Resistance) 18
2.3
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
36
Strength to Weight: Bending, points 23
29
Thermal Diffusivity, mm2/s 9.8
11
Thermal Shock Resistance, points 21
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0.77 to 0.85
0.3 to 0.37
Chromium (Cr), % 3.9 to 4.3
1.5 to 1.8
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 88.8 to 91.1
94.4 to 96.3
Manganese (Mn), % 0.15 to 0.35
0.4 to 0.7
Molybdenum (Mo), % 4.0 to 4.5
0.15 to 0.25
Nickel (Ni), % 0
0.85 to 1.2
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Tungsten (W), % 0 to 0.25
0
Vanadium (V), % 0.9 to 1.1
0