Quenched and Tempered (+QT) 1.8522 Steel
EN 1.8522 +QT steel is EN 1.8522 steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.8522 +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
380
Elastic (Young's, Tensile) Modulus
190 GPa 28 x 106 psi
Elongation at Break
13 %
Fatigue Strength
680 MPa 99 x 103 psi
Impact Strength: V-Notched Charpy
34 J 25 ft-lb
Poisson's Ratio
0.29
Shear Modulus
74 GPa 11 x 106 psi
Shear Strength
750 MPa 110 x 103 psi
Tensile Strength: Ultimate (UTS)
1250 MPa 180 x 103 psi
Tensile Strength: Yield (Proof)
1080 MPa 160 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Maximum Temperature: Mechanical
470 °C 890 °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
39 W/m-K 22 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.8 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.9 % IACS
Otherwise Unclassified Properties
Base Metal Price
4.2 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
2.2 kg CO2/kg material
Embodied Energy
31 MJ/kg 13 x 103 BTU/lb
Embodied Water
63 L/kg 7.5 gal/lb
Common Calculations
PREN (Pitting Resistance)
6.2
Resilience: Ultimate (Unit Rupture Work)
150 MJ/m3
Resilience: Unit (Modulus of Resilience)
3090 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
44 points
Strength to Weight: Bending
33 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
36 points
Alloy Composition
| Fe | 93.7 to 96 | |
| Cr | 2.8 to 3.3 | |
| Mo | 0.7 to 1.2 | |
| Mn | 0.4 to 0.7 | |
| C | 0.29 to 0.36 | |
| Si | 0 to 0.4 | |
| V | 0.15 to 0.25 | |
| Ni | 0 to 0.3 | |
| Cu | 0 to 0.1 | |
| S | 0 to 0.035 | |
| P | 0 to 0.025 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ISO 683-5: Heat treatable steels, alloy steels and free-cutting steels - Part 5: Nitriding steels
ISO 683-17: Heat-treated steels, alloy steels and free-cutting steels - Part 17: Ball and roller bearing steels
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