EN 1.6570 (G32NiCrMo8-5-4) Cast Steel
EN 1.6570 steel is an alloy steel formulated for casting. 1.6570 is the EN numeric designation for this material. G32NiCrMo8-5-4 is the EN chemical designation.
It can have a very high tensile strength among cast alloy steels. In addition, it can have a moderately low ductility and has a moderately high electrical conductivity.
The properties of EN 1.6570 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 1.6570 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
270 to 340
Elastic (Young's, Tensile) Modulus
190 GPa 27 x 106 psi
Elongation at Break
11 to 17 %
Fatigue Strength
500 to 660 MPa 73 to 96 x 103 psi
Impact Strength: V-Notched Charpy
40 to 48 J 29 to 36 ft-lb
Poisson's Ratio
0.29
Shear Modulus
73 GPa 11 x 106 psi
Tensile Strength: Ultimate (UTS)
910 to 1130 MPa 130 to 160 x 103 psi
Tensile Strength: Yield (Proof)
760 to 1060 MPa 110 to 150 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
40 W/m-K 23 BTU/h-ft-°F
Thermal Expansion
13 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
7.7 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.8 % IACS
Otherwise Unclassified Properties
Base Metal Price
3.9 % relative
Density
7.9 g/cm3 490 lb/ft3
Embodied Carbon
1.7 kg CO2/kg material
Embodied Energy
23 MJ/kg 9.9 x 103 BTU/lb
Embodied Water
56 L/kg 6.7 gal/lb
Common Calculations
PREN (Pitting Resistance)
2.5
Resilience: Ultimate (Unit Rupture Work)
120 to 140 MJ/m3
Resilience: Unit (Modulus of Resilience)
1520 to 3010 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
32 to 40 points
Strength to Weight: Bending
27 to 31 points
Thermal Diffusivity
11 mm2/s
Thermal Shock Resistance
27 to 33 points
Alloy Composition
Among cast alloy steels, the composition of EN 1.6570 steel is notable for containing comparatively high amounts of chromium (Cr) and nickel (Ni). Chromium is used to improve corrosion resistance and most mechanical properties (particularly at higher temperatures). Nickel is used to improve mechanical properties, and to make the alloy easier to heat treat.
| Fe | 94 to 96.2 | |
| Ni | 1.6 to 2.1 | |
| Cr | 1.0 to 1.4 | |
| Mn | 0.6 to 1.0 | |
| Mo | 0.3 to 0.5 | |
| C | 0.28 to 0.35 | |
| Si | 0 to 0.6 | |
| P | 0 to 0.020 | |
| S | 0 to 0.015 |
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