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EN 1.7729 Steel vs. EN 1.6580 Steel

Both EN 1.7729 steel and EN 1.6580 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.7729 steel and the bottom bar is EN 1.6580 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
220 to 350
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
11 to 19
Fatigue Strength, MPa 500
310 to 610
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 560
450 to 700
Tensile Strength: Ultimate (UTS), MPa 910
720 to 1170
Tensile Strength: Yield (Proof), MPa 750
460 to 990

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 430
450
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
40
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 3.8
4.3
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.3
1.8
Embodied Energy, MJ/kg 49
23
Embodied Water, L/kg 59
59

Common Calculations

PREN (Pitting Resistance) 4.4
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1500
560 to 2590
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 32
26 to 41
Strength to Weight: Bending, points 27
23 to 31
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 27
21 to 34

Alloy Composition

Aluminum (Al), % 0.015 to 0.080
0
Arsenic (As), % 0 to 0.020
0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0.17 to 0.23
0.26 to 0.34
Chromium (Cr), % 0.9 to 1.2
1.8 to 2.2
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 94.8 to 97
93.7 to 95.5
Manganese (Mn), % 0.35 to 0.75
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.3 to 0.5
Nickel (Ni), % 0 to 0.2
1.8 to 2.2
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0.070 to 0.15
0
Vanadium (V), % 0.6 to 0.8
0