
Copper Nickel 70/30 & 90/10 Round Bars Manufacturer, Supplier & Exporter in India
Copper Nickel 70/30 and 90/10 Round Bars supplied by Astromet Steel & Engineering are premium copper-nickel alloys widely used for marine and seawater applications. These alloys offer excellent corrosion resistance, especially in chloride-rich and seawater environments. Their inherent resistance to biofouling and erosion corrosion ensures long service life. Both grades are engineered for reliable performance in harsh operating conditions.
Copper Nickel 70/30 Round Bars provide higher strength and superior resistance to high-velocity seawater compared to 90/10. Copper Nickel 90/10 Round Bars, on the other hand, offer excellent thermal conductivity and cost efficiency. Both alloys demonstrate excellent resistance to stress corrosion cracking. This makes them suitable for continuous exposure to marine atmospheres.
Astromet Steel & Engineering manufactures Copper Nickel Round Bars under strict quality and metallurgical controls. The bars are available in hot rolled, cold drawn, and annealed conditions. Dimensional accuracy and surface finish comply with international standards. Custom sizes and cut lengths are supplied as per client requirements.
These copper-nickel alloys exhibit excellent weldability and formability. They maintain stable mechanical properties across a wide temperature range. Copper Nickel Round Bars require minimal maintenance. This results in lower lifecycle costs and high operational reliability.
Copper Nickel Round Bar Specifications
| Material | Copper Nickel |
| Size range | 12 mm – 46 mm (1/2 inch- 1 ¾ inch) |
| Chamfering | Available in 30°, 45° & 60° through fully automatic, both-end chamfering machine |
| Available Forms | Threaded, Profiles, Rod, Blocks, Round, Channel, Round Rod, Half Round, Triangle, Hollow, Precision Ground, Rectangle, T-Bar, Rings, Ingot, Billet, Forging etc. |
| Surface Finish | Cold (bright) drawn, smooth turned, hot rolled, centreless ground, peeled, Rough Turned, hot rolled annealed, Bright, slit rolled edge, Polish, Grinding, Centreless Ground & Black |
| Length | 2 meters to 7.5 meters ( 8 feet to 24 feet), or Custom Length as per Requirement |
| Size Tolerances | h10 and h11 |
| Tolerance | H8, H10, H9, H11, H13K9, H12, K10, K12 K11 or as per clients’ requirements |
|---|---|
| Crack Test | Magnetic Particle Inspection (MPI) |
| Heat Treatment | Annealed, Solution Annealed |
Copper Nickel Round Bar Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS |
| Cupro Nickel 90/10 | 2.0872 | C70600 |
| Cupro Nickel 70/30 | 2.0882 | C71500 |
Copper Nickel Round Bar Chemical Composition
| Grade | Fe | Cu | Pb | Ni | Mn | Zn |
| Cu-Ni 70-30 | 0.4-1.0 | 65.0 min | .05 max | 29-33 | 1 max | 1 max |
| Cu-Ni 90-10 | 1.8 max | 88.6 min | .05 max | 9-11 max | 1.0 max | 1 max |
Copper Nickel Alloy Round Bar Mechanical Properties
| Typical Values | Units | CuNi 70/30 | CuNi 90/10 |
| Proof Stress (YS 0,2), (Rp 0,2) | MPa | > 130 | > 110 |
| ksi | > 19 | > 16 | |
| Tensile Strength (UTS),(Rm) | MPa | > 350 | > 310 |
| ksi | > 51 | > 44 | |
| Hardness (HB10 D2 ) | > 80 | > 70 | |
| Elongation (E 5,65 VS) | % | > 30 | > 35 |
Why Choose Astromet Steel & Engineering?
This advanced resistance to intergranular corrosion because of the
- Consistent quality & competitive pricing
- Ready stock & custom fabrication
- International standard compliance
- On-time delivery worldwide
- Complete documentation & certification
Copper Nickel 70/30 & 90/10 Round Bars Usage & Applications
Copper Nickel 70/30 & 90/10 Round Bars are extensively used in shipbuilding, marine engineering, seawater piping systems, heat exchangers, condensers, desalination plants, offshore platforms, and coastal power plants. They are also applied in hydraulic systems, marine fasteners, and seawater handling equipment where corrosion resistance is critical.
