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EN 1.8505 Steel vs. EN 1.7709 Steel

Both EN 1.8505 steel and EN 1.7709 steel are iron alloys. They have a very high 99% 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 1.8505 steel and the bottom bar is EN 1.7709 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
200 to 230
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 1050
650 to 780

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 440
440
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 39
33
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
3.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
2.3
Embodied Energy, MJ/kg 22
32
Embodied Water, L/kg 65
56

Common Calculations

PREN (Pitting Resistance) 2.6
3.6
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 37
23 to 27
Strength to Weight: Bending, points 30
21 to 24
Thermal Diffusivity, mm2/s 11
8.9
Thermal Shock Resistance, points 31
22 to 26

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0 to 0.030
Carbon (C), % 0.28 to 0.35
0.17 to 0.25
Chromium (Cr), % 1.5 to 1.8
1.2 to 1.5
Iron (Fe), % 95.4 to 97.1
95.2 to 97.5
Manganese (Mn), % 0.4 to 0.7
0.4 to 0.8
Molybdenum (Mo), % 0.2 to 0.4
0.55 to 0.8
Nickel (Ni), % 0
0 to 0.6
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 0.030
Vanadium (V), % 0
0.2 to 0.35