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Quenched and Tempered (+QT) 1.5507 Steel

EN 1.5507 +QT steel is EN 1.5507 steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.5507 +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

260

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

16 %

Fatigue Strength

480 MPa 70 x 103 psi

Impact Strength: V-Notched Charpy

46 J 34 ft-lb

Poisson's Ratio

0.29

Reduction in Area

58 %

Shear Modulus

73 GPa 11 x 106 psi

Shear Strength

540 MPa 78 x 103 psi

Tensile Strength: Ultimate (UTS)

880 MPa 130 x 103 psi

Tensile Strength: Yield (Proof)

730 MPa 110 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

410 °C 760 °F

Melting Completion (Liquidus)

1460 °C 2660 °F

Melting Onset (Solidus)

1420 °C 2590 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

49 W/m-K 28 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

7.1 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.2 % IACS

Otherwise Unclassified Properties

Base Metal Price

2.0 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.4 kg CO2/kg material

Embodied Energy

19 MJ/kg 8.1 x 103 BTU/lb

Embodied Water

49 L/kg 5.8 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

130 MJ/m3

Resilience: Unit (Modulus of Resilience)

1420 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

31 points

Strength to Weight: Bending

26 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

26 points

Alloy Composition

Iron (Fe)Fe 97.8 to 98.7
Manganese (Mn)Mn 0.8 to 1.0
Chromium (Cr)Cr 0.25 to 0.35
Carbon (C)C 0.21 to 0.25
Copper (Cu)Cu 0 to 0.25
Silicon (Si)Si 0 to 0.15
Aluminum (Al)Al 0.020 to 0.080
Titanium (Ti)Ti 0 to 0.060
Phosphorus (P)P 0 to 0.015
Sulfur (S)S 0 to 0.015
Boron (B)B 0.00080 to 0.0050

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

Boron in Steel, S. K. Banerji and J. E. Morral (editors), 1980

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