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EN 1.7709 Steel vs. EN 1.8505 Steel

Both EN 1.7709 steel and EN 1.8505 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 1.7709 steel and the bottom bar is EN 1.8505 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 230
320
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 650 to 780
1050

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Aluminum (Al), % 0 to 0.030
0.8 to 1.2
Carbon (C), % 0.17 to 0.25
0.28 to 0.35
Chromium (Cr), % 1.2 to 1.5
1.5 to 1.8
Iron (Fe), % 95.2 to 97.5
95.4 to 97.1
Manganese (Mn), % 0.4 to 0.8
0.4 to 0.7
Molybdenum (Mo), % 0.55 to 0.8
0.2 to 0.4
Nickel (Ni), % 0 to 0.6
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Vanadium (V), % 0.2 to 0.35
0