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EN 1.6579 Steel vs. EN 1.7365 Steel

Both EN 1.6579 steel and EN 1.7365 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 1.6579 steel and the bottom bar is EN 1.7365 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 290
210
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 14
18
Fatigue Strength, MPa 380 to 570
320
Impact Strength: V-Notched Charpy, J 35 to 41
31
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
74
Tensile Strength: Ultimate (UTS), MPa 850 to 980
700
Tensile Strength: Yield (Proof), MPa 600 to 910
470

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.7
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 3.7
4.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.7
1.8
Embodied Energy, MJ/kg 22
24
Embodied Water, L/kg 56
70

Common Calculations

PREN (Pitting Resistance) 2.4
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100 to 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 950 to 2210
580
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 30 to 35
25
Strength to Weight: Bending, points 25 to 28
22
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 25 to 29
20

Alloy Composition

Carbon (C), % 0.32 to 0.38
0.12 to 0.19
Chromium (Cr), % 1.4 to 1.7
4.0 to 6.0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 94.2 to 96.1
91.2 to 94.9
Manganese (Mn), % 0.6 to 1.0
0.5 to 0.8
Molybdenum (Mo), % 0.15 to 0.35
0.45 to 0.65
Nickel (Ni), % 1.4 to 1.7
0
Phosphorus (P), % 0 to 0.025
0 to 0.025
Silicon (Si), % 0 to 0.6
0 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.025
Vanadium (V), % 0
0 to 0.050