MakeItFrom.com
Menu (ESC)

EN 1.7706 (G17CrMoV5-10) Cast Steel

EN 1.7706 steel is an alloy steel formulated for casting. Cited properties are appropriate for the quenched and tempered condition. 1.7706 is the EN numeric designation for this material. G17CrMoV5-10 is the EN chemical designation.

It has a very high embodied energy among cast alloy steels. In addition, it has a moderately low ductility and a moderately high tensile strength.

The graph bars on the material properties cards below compare EN 1.7706 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 27 x 106 psi

Elongation at Break

17 %

Fatigue Strength

330 MPa 49 x 103 psi

Impact Strength: V-Notched Charpy

30 J 22 ft-lb

Poisson's Ratio

0.29

Shear Modulus

73 GPa 11 x 106 psi

Tensile Strength: Ultimate (UTS)

690 MPa 99 x 103 psi

Tensile Strength: Yield (Proof)

500 MPa 73 x 103 psi

Thermal Properties

Latent Heat of Fusion

260 J/g

Maximum Temperature: Mechanical

440 °C 820 °F

Melting Completion (Liquidus)

1470 °C 2670 °F

Melting Onset (Solidus)

1430 °C 2600 °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

7.6 % IACS

Electrical Conductivity: Equal Weight (Specific)

8.7 % IACS

Otherwise Unclassified Properties

Base Metal Price

3.7 % relative

Density

7.9 g/cm3 490 lb/ft3

Embodied Carbon

2.3 kg CO2/kg material

Embodied Energy

32 MJ/kg 14 x 103 BTU/lb

Embodied Water

57 L/kg 6.8 gal/lb

Common Calculations

PREN (Pitting Resistance)

4.7

Resilience: Ultimate (Unit Rupture Work)

110 MJ/m3

Resilience: Unit (Modulus of Resilience)

670 kJ/m3

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

24 points

Strength to Weight: Axial

24 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 1.7706 steel is notable for including copper (Cu) and vanadium (V). Copper is used to improve corrosion resistance, and to add at least some degree of precipitation hardenability. Vanadium has a strong hardening effect, but this effect is particularly sensitive to the type of tempering.

Iron (Fe) 94.7 to 97.1
Chromium (Cr) 1.2 to 1.5
Molybdenum (Mo) 0.9 to 1.1
Manganese (Mn) 0.5 to 0.9
Silicon (Si) 0 to 0.6
Vanadium (V) 0.2 to 0.3
Nickel (Ni) 0 to 0.4
Carbon (C) 0.15 to 0.2
Copper (Cu) 0 to 0.3
Phosphorus (P) 0 to 0.020
Sulfur (S) 0 to 0.015

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