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EN 1.1181 +QT Steel vs. EN 1.7106 +QT Steel

Both EN 1.1181 +QT steel and EN 1.7106 +QT steel are iron alloys. Both are furnished in the quenched and tempered condition. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is EN 1.1181 +QT steel and the bottom bar is EN 1.7106 +QT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
500
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
6.7
Fatigue Strength, MPa 260
880
Poisson's Ratio 0.29
0.29
Reduction in Area, % 51
29
Shear Modulus, GPa 73
72
Shear Strength, MPa 390
970
Tensile Strength: Ultimate (UTS), MPa 620
1650
Tensile Strength: Yield (Proof), MPa 380
1510

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 42
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.1
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 47
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22
59
Strength to Weight: Bending, points 21
40
Thermal Diffusivity, mm2/s 11
13
Thermal Shock Resistance, points 21
50

Alloy Composition

Carbon (C), % 0.32 to 0.39
0.52 to 0.6
Chromium (Cr), % 0 to 0.4
0.2 to 0.45
Iron (Fe), % 97.4 to 99.18
95.9 to 97
Manganese (Mn), % 0.5 to 0.8
0.7 to 1.0
Molybdenum (Mo), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 0.4
1.6 to 2.0
Sulfur (S), % 0 to 0.035
0 to 0.025