EN 1.7725 (G30CrMoV6-4) Cast Steel
EN 1.7725 steel is an alloy steel formulated for casting. 1.7725 is the EN numeric designation for this material. G30CrMoV6-4 is the EN chemical designation.
It can have a fairly high tensile strength among cast alloy steels. In addition, it has a moderately low thermal conductivity and a fairly low ductility.
The properties of EN 1.7725 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare EN 1.7725 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
250 to 300
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
14 %
Fatigue Strength
390 to 550 MPa 57 to 79 x 103 psi
Impact Strength: V-Notched Charpy
34 to 35 J 25 to 26 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
830 to 1000 MPa 120 to 150 x 103 psi
Tensile Strength: Yield (Proof)
610 to 860 MPa 88 to 120 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 2590 °F
Specific Heat Capacity
470 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
39 W/m-K 23 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.6 % IACS
Otherwise Unclassified Properties
Base Metal Price
2.9 % relative
Density
7.8 g/cm3 490 lb/ft3
Embodied Carbon
1.8 kg CO2/kg material
Embodied Energy
24 MJ/kg 11 x 103 BTU/lb
Embodied Water
54 L/kg 6.5 gal/lb
Common Calculations
PREN (Pitting Resistance)
2.8
Resilience: Ultimate (Unit Rupture Work)
110 to 130 MJ/m3
Resilience: Unit (Modulus of Resilience)
980 to 1940 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
29 to 35 points
Strength to Weight: Bending
25 to 28 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
24 to 29 points
Alloy Composition
Among cast alloy steels, the composition of EN 1.7725 steel is notable for including vanadium (V). Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering.
| Fe | 95.7 to 97.5 | |
| Cr | 1.3 to 1.7 | |
| Mn | 0.6 to 1.0 | |
| Mo | 0.3 to 0.5 | |
| C | 0.27 to 0.34 | |
| Si | 0 to 0.6 | |
| V | 0.050 to 0.15 | |
| S | 0 to 0.030 | |
| P | 0 to 0.025 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Similar Alloys
Further Reading
EN 10293: Steel castings - Steel castings for general engineering uses
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