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EN 1.7706 Steel vs. EN 1.6580 Steel

Both EN 1.7706 steel and EN 1.6580 steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 31 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 1.7706 steel and the bottom bar is EN 1.6580 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
220 to 350
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
11 to 19
Fatigue Strength, MPa 330
310 to 610
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 690
720 to 1170
Tensile Strength: Yield (Proof), MPa 500
460 to 990

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 440
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 3.7
4.3
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.3
1.8
Embodied Energy, MJ/kg 32
23
Embodied Water, L/kg 57
59

Common Calculations

PREN (Pitting Resistance) 4.7
3.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 670
560 to 2590
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 24
26 to 41
Strength to Weight: Bending, points 22
23 to 31
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 20
21 to 34

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.26 to 0.34
Chromium (Cr), % 1.2 to 1.5
1.8 to 2.2
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 94.7 to 97.1
93.7 to 95.5
Manganese (Mn), % 0.5 to 0.9
0.3 to 0.6
Molybdenum (Mo), % 0.9 to 1.1
0.3 to 0.5
Nickel (Ni), % 0 to 0.4
1.8 to 2.2
Phosphorus (P), % 0 to 0.020
0 to 0.035
Silicon (Si), % 0 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Vanadium (V), % 0.2 to 0.3
0