Quenched and Tempered (+QT) 1.7711 Steel
EN 1.7711 +QT steel is EN 1.7711 steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.7711 +QT steel to: EN wrought alloy steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
280
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
16 %
Fatigue Strength
520 MPa 76 x 103 psi
Impact Strength: V-Notched Charpy
46 J 34 ft-lb
Poisson's Ratio
0.29
Reduction in Area
50 %
Shear Modulus
73 GPa 11 x 106 psi
Shear Strength
570 MPa 82 x 103 psi
Tensile Strength: Ultimate (UTS)
930 MPa 130 x 103 psi
Tensile Strength: Yield (Proof)
800 MPa 120 x 103 psi
Thermal Properties
Latent Heat of Fusion
250 J/g
Maximum Temperature: Mechanical
430 °C 800 °F
Melting Completion (Liquidus)
1460 °C 2670 °F
Melting Onset (Solidus)
1420 °C 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
33 W/m-K 19 BTU/h-ft-°F
Thermal Expansion
11 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.5 % IACS
Otherwise Unclassified Properties
Base Metal Price
3.0 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
2.3 kg CO2/kg material
Embodied Energy
32 MJ/kg 14 x 103 BTU/lb
Embodied Water
54 L/kg 6.4 gal/lb
Common Calculations
PREN (Pitting Resistance)
2.9
Resilience: Ultimate (Unit Rupture Work)
140 MJ/m3
Resilience: Unit (Modulus of Resilience)
1690 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
33 points
Strength to Weight: Bending
27 points
Thermal Diffusivity
8.9 mm2/s
Thermal Shock Resistance
32 points
Alloy Composition
| Fe | 96 to 97.5 | |
| Cr | 0.9 to 1.2 | |
| Mn | 0.45 to 0.85 | |
| Mo | 0.5 to 0.65 | |
| C | 0.36 to 0.44 | |
| V | 0.25 to 0.35 | |
| Si | 0 to 0.4 | |
| S | 0 to 0.030 | |
| P | 0 to 0.025 | |
| Al | 0 to 0.015 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
EN 10269: Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
Creep-Resistant Steels, Fujio Abe et al. (editors), 2008
Microstructure of Steels and Cast Irons, Madeleine Durand-Charre, 2004
Manufacture and Uses of Alloy Steels, Henry D. Hibbard, 2005
Ferrous Materials: Steel and Cast Iron, Hans Berns and Werner Theisen, 2008
Steels: Processing, Structure, and Performance, 2nd ed., George Krauss, 2015