Technical Purpose and Application Areas
The ASTM B543 specification defines regulated requirements for welded tubes with a diameter not exceeding 31/8 inches. This rolled product is manufactured from high-purity copper and specialized copper alloys. The primary scope of application for these products includes the manufacture of high-efficiency tubular heat exchangers, condenser systems, evaporator units, and critical components in the mechanical engineering sector. EV Group China supplies material that meets strict engineering tolerances for operation under conditions of high thermal loads.
The list of approved alloys includes the following grades according to UNS classification:
| Alloy Designation (UNS) | Type of Metallurgical Composition |
|---|---|
| C10800 | Oxygen-free copper with controlled phosphorus content |
| C12200 | Phosphorus-deoxidized copper (high residual content) |
| C19400 | Copper-iron alloy system |
| C23000 | Red brass |
| C44300 | Arsenical admiralty brass |
| C44400 | Antimonial admiralty brass |
| C44500 | Phosphorized admiralty brass |
| C68700 | Arsenical aluminum brass |
| C70400 | Copper-nickel (95-5 ratio) |
| C70600 | Copper-nickel (90-10 ratio) |
| C70620 | Copper-nickel (90-10), adapted for welding |
| C71000 | Copper-nickel (80-20 ratio) |
| C71500 | Copper-nickel (70-30 ratio) |
| C71520 | Copper-nickel (70-30), adapted for welding |
| C71640 | Complex copper-nickel-iron-manganese alloy |
| C72200 | Specialized copper-nickel alloy |