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EN 1.7367 (GX10CrMoV9-1) Cast Steel

EN 1.7367 steel is an alloy steel formulated for casting. Cited properties are appropriate for the normalized and tempered condition. 1.7367 is the EN numeric designation for this material. GX10CrMoV9-1 is the EN chemical designation.

It has a very low thermal conductivity among cast alloy steels. In addition, it has a very high embodied energy and a very high base cost.

The graph bars on the material properties cards below compare EN 1.7367 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

200

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

18 %

Fatigue Strength

310 MPa 45 x 103 psi

Impact Strength: V-Notched Charpy

31 J 23 ft-lb

Poisson's Ratio

0.28

Shear Modulus

75 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

670 MPa 98 x 103 psi

Tensile Strength: Yield (Proof)

460 MPa 67 x 103 psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Maximum Temperature: Mechanical

600 °C 1100 °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

26 W/m-K 15 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

8.9 % IACS

Electrical Conductivity: Equal Weight (Specific)

10 % IACS

Otherwise Unclassified Properties

Base Metal Price

7.0 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

2.6 kg CO2/kg material

Embodied Energy

37 MJ/kg 16 x 103 BTU/lb

Embodied Water

88 L/kg 10 gal/lb

Common Calculations

PREN (Pitting Resistance)

13

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m3

Resilience: Unit (Modulus of Resilience)

560 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

24 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

6.9 mm2/s

Thermal Shock Resistance

19 points

Alloy Composition

Among cast alloy steels, the composition of EN 1.7367 steel is notable for including nitrogen (N) and niobium (Nb). Nitrogen has a substantial strengthening effect, but may contribute to strain aging unless the steel is deoxidized with aluminum. Niobium is primarily used to improve yield strength.

Iron (Fe) 87.3 to 90.3
Chromium (Cr) 8.0 to 9.5
Molybdenum (Mo) 0.85 to 1.1
Manganese (Mn) 0.3 to 0.6
Silicon (Si) 0.2 to 0.5
Vanadium (V) 0.18 to 0.25
Nickel (Ni) 0 to 0.4
Carbon (C) 0.080 to 0.12
Niobium (Nb) 0.060 to 0.1
Nitrogen (N) 0.030 to 0.070
Phosphorus (P) 0 to 0.030
Aluminum (Al) 0 to 0.020
Sulfur (S) 0 to 0.010
Titanium (Ti) 0 to 0.010
Zirconium (Zr) 0 to 0.010

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

Followup Questions

Similar Alloys

Further Reading

ISO 4991: Steel castings for pressure purposes

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