MakeItFrom.com
Menu (ESC)

EN 1.7365 (GX15CrMo5) Cast Steel

EN 1.7365 steel is an alloy steel formulated for casting. Cited properties are appropriate for the quenched and tempered condition. 1.7365 is the EN numeric designation for this material. GX15CrMo5 is the EN chemical designation.

It has a fairly high electrical conductivity among cast alloy steels. In addition, it has a moderately high base cost and a moderately low ductility.

The graph bars on the material properties cards below compare EN 1.7365 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

210

Elastic (Young's, Tensile) Modulus

190 GPa 28 x 106 psi

Elongation at Break

18 %

Fatigue Strength

320 MPa 46 x 103 psi

Impact Strength: V-Notched Charpy

31 J 23 ft-lb

Poisson's Ratio

0.29

Shear Modulus

74 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

700 MPa 100 x 103 psi

Tensile Strength: Yield (Proof)

470 MPa 68 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

510 °C 950 °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

40 W/m-K 23 BTU/h-ft-°F

Thermal Expansion

13 µm/m-K

Electrical Properties

Electrical Conductivity: Equal Volume

8.2 % IACS

Electrical Conductivity: Equal Weight (Specific)

9.4 % IACS

Otherwise Unclassified Properties

Base Metal Price

4.4 % relative

Density

7.8 g/cm3 490 lb/ft3

Embodied Carbon

1.8 kg CO2/kg material

Embodied Energy

24 MJ/kg 10 x 103 BTU/lb

Embodied Water

70 L/kg 8.3 gal/lb

Common Calculations

PREN (Pitting Resistance)

6.8

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m3

Resilience: Unit (Modulus of Resilience)

580 kJ/m3

Stiffness to Weight: Axial

14 points

Stiffness to Weight: Bending

25 points

Strength to Weight: Axial

25 points

Strength to Weight: Bending

22 points

Thermal Diffusivity

11 mm2/s

Thermal Shock Resistance

20 points

Alloy Composition

Among cast alloy steels, the composition of EN 1.7365 steel is notable for including copper (Cu) and containing a comparatively high amount of chromium (Cr). Copper is used to improve corrosion resistance, and to add at least some degree of precipitation hardenability. Chromium is used to improve corrosion resistance and most mechanical properties (particularly at higher temperatures).

Iron (Fe) 91.2 to 94.9
Chromium (Cr) 4.0 to 6.0
Manganese (Mn) 0.5 to 0.8
Molybdenum (Mo) 0.45 to 0.65
Silicon (Si) 0 to 0.8
Carbon (C) 0.12 to 0.19
Copper (Cu) 0 to 0.3
Vanadium (V) 0 to 0.050
Phosphorus (P) 0 to 0.025
Sulfur (S) 0 to 0.025

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