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EN 1.1181 +QT Steel vs. EN 1.7216 +QT Steel

Both EN 1.1181 +QT steel and EN 1.7216 +QT steel are iron alloys. Both are furnished in the quenched and tempered condition. Their average alloy composition is basically identical. There are 33 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 1.1181 +QT steel and the bottom bar is EN 1.7216 +QT steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
280
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 20
12
Fatigue Strength, MPa 260
440
Impact Strength: V-Notched Charpy, J 38
41
Poisson's Ratio 0.29
0.29
Rockwell C Hardness 53
53
Shear Modulus, GPa 73
73
Shear Strength, MPa 390
560
Tensile Strength: Ultimate (UTS), MPa 620
930
Tensile Strength: Yield (Proof), MPa 380
690

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
420
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 42
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 2.1
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 47
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380
1280
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
33
Strength to Weight: Bending, points 21
27
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 21
27

Alloy Composition

Carbon (C), % 0.32 to 0.39
0.27 to 0.34
Chromium (Cr), % 0 to 0.4
0.8 to 1.2
Iron (Fe), % 97.4 to 99.18
97.2 to 98.4
Manganese (Mn), % 0.5 to 0.8
0.35 to 0.6
Molybdenum (Mo), % 0 to 0.1
0.15 to 0.3
Nickel (Ni), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 0.4
0 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.035