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EN 1.1170 Steel vs. EN 1.7720 Steel

Both EN 1.1170 steel and EN 1.7720 steel are iron alloys. They have a very high 99% 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 1.1170 steel and the bottom bar is EN 1.7720 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 16 to 17
19
Fatigue Strength, MPa 220 to 330
230
Impact Strength: V-Notched Charpy, J 28 to 35
30
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 640 to 730
590
Tensile Strength: Yield (Proof), MPa 330 to 500
340

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
40
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
2.2
Embodied Energy, MJ/kg 19
30
Embodied Water, L/kg 49
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 100
97
Resilience: Unit (Modulus of Resilience), kJ/m3 290 to 670
300
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 26
21
Strength to Weight: Bending, points 21 to 23
20
Thermal Diffusivity, mm2/s 13
11
Thermal Shock Resistance, points 20 to 23
17

Alloy Composition

Carbon (C), % 0.25 to 0.32
0.1 to 0.15
Chromium (Cr), % 0 to 0.4
0.3 to 0.5
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 96.7 to 98.5
96.6 to 98.6
Manganese (Mn), % 1.3 to 1.7
0.4 to 0.7
Molybdenum (Mo), % 0 to 0.1
0.4 to 0.6
Nickel (Ni), % 0 to 0.4
0 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.45
Sulfur (S), % 0 to 0.035
0 to 0.020
Vanadium (V), % 0
0.22 to 0.3