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Quenched and Tempered (+QT) 1.5026 Steel

EN 1.5026 +QT steel is EN 1.5026 steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.5026 +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

480

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

6.7 %

Fatigue Strength

850 MPa 120 x 103 psi

Impact Strength: U-Notched Charpy

15 J 11 ft-lb

Poisson's Ratio

0.29

Reduction in Area

29 %

Shear Modulus

72 GPa 10 x 106 psi

Shear Strength

940 MPa 140 x 103 psi

Tensile Strength: Ultimate (UTS)

1600 MPa 230 x 103 psi

Tensile Strength: Yield (Proof)

1460 MPa 210 x 103 psi

Thermal Properties

Latent Heat of Fusion

280 J/g

Maximum Temperature: Mechanical

400 °C 750 °F

Melting Completion (Liquidus)

1440 °C 2620 °F

Melting Onset (Solidus)

1390 °C 2540 °F

Specific Heat Capacity

480 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

47 W/m-K 27 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.3 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.5 % IACS

Otherwise Unclassified Properties

Base Metal Price

1.9 % relative

Density

7.7 g/cm3 480 lb/ft3

Embodied Carbon

1.5 kg CO2/kg material

Embodied Energy

19 MJ/kg 8.4 x 103 BTU/lb

Embodied Water

46 L/kg 5.4 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

100 MJ/m3

Resilience: Unit (Modulus of Resilience)

5720 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

58 points

Strength to Weight: Bending

39 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

48 points

Alloy Composition

Iron (Fe)Fe 96.5 to 97.3
Silicon (Si)Si 1.6 to 2.0
Manganese (Mn)Mn 0.6 to 0.9
Carbon (C)C 0.52 to 0.6
Phosphorus (P)P 0 to 0.025
Sulfur (S)S 0 to 0.025

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

EN 10089: Hot rolled steels for quenched and tempered springs - Technical delivery conditions

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