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EN 1.6781 Steel vs. EN 1.5525 Steel

Both EN 1.6781 steel and EN 1.5525 steel are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 30 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 1.6781 steel and the bottom bar is EN 1.5525 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
130 to 180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
11 to 21
Fatigue Strength, MPa 450
210 to 310
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 830
440 to 1440
Tensile Strength: Yield (Proof), MPa 680
300 to 490

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 450
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 44
50
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 9.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
1.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.9
1.4
Embodied Energy, MJ/kg 25
19
Embodied Water, L/kg 60
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
44 to 240
Resilience: Unit (Modulus of Resilience), kJ/m3 1220
240 to 640
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
16 to 51
Strength to Weight: Bending, points 25
16 to 36
Thermal Diffusivity, mm2/s 12
13
Thermal Shock Resistance, points 24
13 to 42

Alloy Composition

Boron (B), % 0
0.00080 to 0.0050
Carbon (C), % 0.15 to 0.19
0.18 to 0.23
Chromium (Cr), % 1.3 to 1.8
0 to 0.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 92.6 to 94.6
97.7 to 98.9
Manganese (Mn), % 0.55 to 0.8
0.9 to 1.2
Molybdenum (Mo), % 0.45 to 0.6
0
Nickel (Ni), % 3.0 to 3.5
0
Phosphorus (P), % 0 to 0.015
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.3
Sulfur (S), % 0 to 0.015
0 to 0.025