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CC766S High Tensile Brass Casting
CC766S High Tensile Brass Casting – CuZn37Mn3Al2Fe1
CC766S High Tensile Brass Casting – CuZn37Mn3Al2Fe1
CC766S (EN 1982 / CuZn37Mn3Al2Fe1-C) is the European standard for the highest-strength commercial brass casting alloy, directly equivalent to US C86300. Tensile strength of 620–690 MPa is achieved through very high manganese (2.5–5.0%), aluminium (0.5–1.5%), and iron (2.0–4.0%) additions in an alpha-beta CuZn matrix. CC766S is specified for the most demanding structural and marine applications: large propellers, heavy worm wheels, high-load bearings, and offshore structural hardware.
Alloy Overview
CC766S’s extremely high strength (620 MPa sand, 690 MPa die) is due to the high multi-element alloying creating extensive beta phase precipitation hardening. At 130–160 HB hardness, CC766S requires carbide tooling for all machining operations. Despite the high strength, elongation of 14% provides adequate toughness for shock-loaded marine applications. Microstructure is predominantly beta phase with alpha phase inclusions.
Material Composition
| Element | Min % | Max % | Typical % | Role |
|---|---|---|---|---|
| Copper (Cu) | 60.0 | 66.0 | 63.0 | Primary matrix |
| Zinc (Zn) | Balance | Balance | ~28.5 | Alpha-beta structure |
| Manganese (Mn) | 2.5 | 5.0 | 4.0 | Primary strengthener |
| Aluminium (Al) | 0.50 | 1.5 | 1.0 | Strengthener, corrosion |
| Iron (Fe) | 2.0 | 4.0 | 3.0 | Grain refiner, strengthener |
| Nickel (Ni) | – | 1.5 | 0.5 | Toughness |
| Lead (Pb) | – | 0.20 | – | Impurity limit |
| Tin (Sn) | – | 0.20 | – | Impurity limit |
| Silicon (Si) | – | 0.10 | – | Impurity |
| Phosphorus (P) | – | 0.05 | – | Deoxidant |
Mechanical Properties
| Property | Sand Cast | Die Cast | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 620 min | 690 min | ASTM B584/EN 1982 |
| Yield Strength (MPa) | 310 | 370 | ASTM E8 |
| Elongation (%) | 14% | 16% | ASTM E8 |
| Hardness (HB) | 130–160 | ASTM E10 | |
| Density (g/cm³) | 8.28 | – | |
| Electrical Conductivity (%IACS) | 5–8 | – | |
| Melting Range (°C) | 855–885 | – | |
| Machinability (%) | 8 | CDA scale | |
International Equivalent Grades
| Standard | Designation | Name |
|---|---|---|
| Europe (EN 1982) | CC766S | CuZn37Mn3Al2Fe1-C |
| USA (ASTM B584) | C86300 / CDA 863 | High Tensile Brass Grade C |
| Germany (DIN 1709) | CuZn37Mn3Al2Fe1-C | Hochfestes Sondermessing |
| UK (BS 1400) | HTB3 | High Tensile Brass Grade 3 |
| India (IS 318) | HTB4 | High Tensile Brass Grade 4 |
| Japan (JIS H5111) | HBsC4 | High Strength Brass Casting 4 |
| ISO | CuZn37Mn3Al2Fe1-C | High Tensile Brass Grade C |
| China (GB/T 1176) | ZCuZn38Mn2Pb2 | 高强锰黄铜 |
Applications
CC766S: large marine propellers and hubs for commercial vessels; heavy worm wheels and gear blanks; high-load sleeve and flange bearings; offshore structural components and subsea hardware; marine winch components; heavy pump impellers in abrasive service.
Pricing
US$ 11.50 per kilogram (CIF, indicative). MOQ: sample 1 pc; production 50 pcs.
Quality
EN 1982 CC766S; ASTM B584 C86300; IS 318 HTB4; ISO 9001:2015; EN 10204 3.1 MTR; mechanical property certificates; carbide tooling required for machining. ISO 9001:2015. EN 10204 3.1 MTR.
Related Grades
- C85700 Yellow Brass Casting
- C46400 Naval Brass Casting
- C83600 LG2 Red Brass Casting
- Brass Castings – All Grades
Request a Quote
Price: US$ 11.50/kg. Email: info@elecaccs.com | www.elecaccs.com
