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EN 1.7779 Steel vs. EN 1.6570 Steel

Both EN 1.7779 steel and EN 1.6570 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 (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.7779 steel and the bottom bar is EN 1.6570 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
270 to 340
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16
11 to 17
Fatigue Strength, MPa 430
500 to 660
Impact Strength: V-Notched Charpy, J 38
40 to 48
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 810
910 to 1130
Tensile Strength: Yield (Proof), MPa 660
760 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Maximum Temperature: Mechanical, °C 470
440
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
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
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 4.0
3.9
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.8
1.7
Embodied Energy, MJ/kg 41
23
Embodied Water, L/kg 64
56

Common Calculations

PREN (Pitting Resistance) 5.0
2.5
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 1150
1520 to 3010
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 29
32 to 40
Strength to Weight: Bending, points 25
27 to 31
Thermal Diffusivity, mm2/s 11
11
Thermal Shock Resistance, points 23
27 to 33

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.17 to 0.23
0.28 to 0.35
Chromium (Cr), % 3.0 to 3.3
1.0 to 1.4
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 93.8 to 95.4
94 to 96.2
Manganese (Mn), % 0.3 to 0.5
0.6 to 1.0
Molybdenum (Mo), % 0.5 to 0.6
0.3 to 0.5
Nickel (Ni), % 0 to 0.3
1.6 to 2.1
Phosphorus (P), % 0 to 0.025
0 to 0.020
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.010
0 to 0.015
Vanadium (V), % 0.45 to 0.55
0