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EN 1.8505 Steel vs. EN 1.8509 Steel

Both EN 1.8505 steel and EN 1.8509 steel are iron alloys. Both are furnished in the quenched and tempered condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is EN 1.8505 steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 13
11
Fatigue Strength, MPa 540
580
Impact Strength: V-Notched Charpy, J 28
29
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 630
680
Tensile Strength: Ultimate (UTS), MPa 1050
1130
Tensile Strength: Yield (Proof), MPa 860
940

Thermal Properties

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

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
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.6
Embodied Energy, MJ/kg 22
22
Embodied Water, L/kg 65
65

Common Calculations

PREN (Pitting Resistance) 2.6
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1950
2340
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 37
40
Strength to Weight: Bending, points 30
31
Thermal Diffusivity, mm2/s 11
10
Thermal Shock Resistance, points 31
33

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0.8 to 1.2
Carbon (C), % 0.28 to 0.35
0.38 to 0.45
Chromium (Cr), % 1.5 to 1.8
1.5 to 1.8
Iron (Fe), % 95.4 to 97.1
95.5 to 97.1
Manganese (Mn), % 0.4 to 0.7
0.4 to 0.7
Molybdenum (Mo), % 0.2 to 0.4
0.2 to 0.35
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 0.035