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EN 1.7366 Steel vs. EN 1.8509 Steel

Both EN 1.7366 steel and EN 1.8509 steel are iron alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.7366 steel and the bottom bar is EN 1.8509 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 210
340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 19
11
Fatigue Strength, MPa 160 to 320
580
Impact Strength: V-Notched Charpy, J 38
29
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 290 to 440
680
Tensile Strength: Ultimate (UTS), MPa 460 to 710
1130
Tensile Strength: Yield (Proof), MPa 230 to 480
940

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 510
440
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
39
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.6
Embodied Energy, MJ/kg 23
22
Embodied Water, L/kg 69
65

Common Calculations

PREN (Pitting Resistance) 6.8
2.6
Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 600
2340
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16 to 25
40
Strength to Weight: Bending, points 17 to 23
31
Thermal Diffusivity, mm2/s 11
10
Thermal Shock Resistance, points 13 to 20
33

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.18
0.38 to 0.45
Chromium (Cr), % 4.0 to 6.0
1.5 to 1.8
Iron (Fe), % 91.9 to 95.3
95.5 to 97.1
Manganese (Mn), % 0.3 to 0.8
0.4 to 0.7
Molybdenum (Mo), % 0.45 to 0.65
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 0.015
0 to 0.035