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EN 1.8865 Steel vs. EN 1.7707 Steel

Both EN 1.8865 steel and EN 1.7707 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. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.8865 steel and the bottom bar is EN 1.7707 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
300
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 19
11
Fatigue Strength, MPa 340
500
Impact Strength: V-Notched Charpy, J 110
31
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 410
600
Tensile Strength: Ultimate (UTS), MPa 660
1010
Tensile Strength: Yield (Proof), MPa 500
800

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 420
460
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 39
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.2
3.3
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.8
1.9
Embodied Energy, MJ/kg 24
27
Embodied Water, L/kg 52
58

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 670
1690
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23
36
Strength to Weight: Bending, points 21
29
Thermal Diffusivity, mm2/s 10
11
Thermal Shock Resistance, points 19
29

Alloy Composition

Boron (B), % 0 to 0.0050
0
Carbon (C), % 0 to 0.18
0.26 to 0.34
Chromium (Cr), % 0 to 1.0
2.3 to 2.7
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.6 to 100
94.7 to 96.8
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 1.5
0 to 0.6
Niobium (Nb), % 0 to 0.050
0
Nitrogen (N), % 0 to 0.015
0
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.0050
0 to 0.035
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0 to 0.080
0.1 to 0.2
Zirconium (Zr), % 0 to 0.15
0