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EN 1.7720 Steel vs. EN 1.1170 Steel

Both EN 1.7720 steel and EN 1.1170 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 1.7720 steel and the bottom bar is EN 1.1170 steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
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
50
Thermal Expansion, µm/m-K 13
12

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

Common Calculations

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

Alloy Composition

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