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Quenched and Tempered (+QT2) 1.6771 Cast Steel

EN 1.6771 +QT2 steel is EN 1.6771 steel in the quenched and tempered condition. The graph bars on the material properties cards below compare EN 1.6771 +QT2 steel to: cast 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

350

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 106 psi

Elongation at Break

8.0 %

Fatigue Strength

680 MPa 98 x 103 psi

Impact Strength: V-Notched Charpy

20 J 14 ft-lb

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

1180 MPa 170 x 103 psi

Tensile Strength: Yield (Proof)

1140 MPa 170 x 103 psi

Thermal Properties

Latent Heat of Fusion

250 J/g

Maximum Temperature: Mechanical

440 °C 820 °F

Melting Completion (Liquidus)

1460 °C 2660 °F

Melting Onset (Solidus)

1420 °C 2580 °F

Specific Heat Capacity

470 J/kg-K 0.11 BTU/lb-°F

Thermal Conductivity

46 W/m-K 27 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

8.0 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.2 % IACS

Otherwise Unclassified Properties

Base Metal Price

5.0 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

1.9 kg CO2/kg material

Embodied Energy

25 MJ/kg 11 x 103 BTU/lb

Embodied Water

58 L/kg 7.0 gal/lb

Common Calculations

PREN (Pitting Resistance)

2.5

Resilience: Ultimate (Unit Rupture Work)

93 MJ/m3

Resilience: Unit (Modulus of Resilience)

3450 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

41 points

Strength to Weight: Bending

31 points

Thermal Diffusivity

13 mm2/s

Thermal Shock Resistance

35 points

Alloy Composition

Iron (Fe)Fe 92.2 to 95
Nickel (Ni)Ni 3.0 to 4.0
Chromium (Cr)Cr 0.8 to 1.2
Manganese (Mn)Mn 0.6 to 1.0
Molybdenum (Mo)Mo 0.3 to 0.6
Carbon (C)C 0.27 to 0.33
Silicon (Si)Si 0 to 0.6
Phosphorus (P)P 0 to 0.030
Sulfur (S)S 0 to 0.020

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

Followup Questions

Further Reading

EN 10293: Steel castings - Steel castings for general engineering uses

Welding Metallurgy, 2nd ed., Sindo Kou, 2003

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