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C86500 Manganese Bronze Casting – High Tensile Brass Casting
C86500 Manganese Bronze Casting – High Tensile Brass Casting
C86500 (UNS C86500, CDA 865, Manganese Bronze / High Tensile Brass, EN CC765S / CuZn37Mn3Al2, IS 318 HTB1) is the most widely used high-tensile brass casting alloy for marine propellers, pump impellers, bearings, and heavy structural components. With tensile strength of 490–550 MPa and hardness of 100–130 HB, C86500 is an industry standard for seagoing vessels, offshore equipment, and industrial machinery requiring the strength of steel with the corrosion resistance and machinability advantages of brass.
Alloy Overview
C86500 achieves tensile strengths approximately twice that of standard yellow brass through its complex alloy chemistry: the 55–60% copper with balance zinc creates a predominantly beta-phase microstructure, strengthened by Mn (0.5–3.0%), Al (0.5–2.0%), Fe (0.4–2.0%), and Ni (up to 1.0%) additions. The result is a versatile high-strength brass suitable for both sand casting (large propellers, pump casings) and gravity die casting (smaller fittings and hardware).
Material Composition
| Element | Min % | Max % | Typical % | Role |
|---|---|---|---|---|
| Copper (Cu) | 55.0 | 60.0 | 57.5 | Primary matrix |
| Zinc (Zn) | Balance | Balance | ~36.5 | Primary strengthener, structure |
| Manganese (Mn) | 0.50 | 3.0 | 1.5 | Strengthener, grain refiner |
| Aluminium (Al) | 0.50 | 2.0 | 1.2 | Strengthener, corrosion resistance |
| Iron (Fe) | 0.40 | 2.0 | 1.0 | Grain refiner, strengthener |
| Nickel (Ni) | – | 1.0 | 0.5 | Toughness, corrosion resistance |
| Lead (Pb) | – | 0.40 | 0.10 | Impurity limit |
| Tin (Sn) | – | 0.20 | – | Impurity limit |
| Silicon (Si) | – | 0.10 | – | Impurity |
| Phosphorus (P) | – | 0.05 | – | Deoxidant |
Mechanical and Physical Properties
| Property | Sand Cast | Gravity Die | Standard |
|---|---|---|---|
| Tensile Strength (MPa) | 490 min | 550 min | ASTM B584 / EN 1982 |
| 0.2% Yield Strength (MPa) | 180 min | 220 min | ASTM E8 |
| Elongation (%) | 18 min | 20 min | ASTM E8 |
| Hardness (HB) | 100–130 | ASTM E10 | |
| Density (g/cm³) | 8.33 | – | |
| Electrical Conductivity (%IACS) | 7–10 | ASTM B193 | |
| Thermal Conductivity (W/m·K) | 60 | – | |
| Melting Range (°C) | 855–895 | – | |
| Machinability (%) | 26 | CDA scale | |
International Equivalent Grades
| Standard | Designation | Common Name |
|---|---|---|
| USA (UNS/ASTM B584) | C86500 / CDA 865 | Manganese Bronze / High Tensile Brass |
| Europe (EN 1982) | CC765S | CuZn37Mn3Al2-C |
| Germany (DIN 1709) | CuZn37Mn3Al2-C / WNr 2.0592 | Hochfestes Sondermessing |
| UK (BS 1400) | HTB1 | High Tensile Brass Casting Grade 1 |
| India (IS 318) | HTB1 | High Tensile Brass Grade 1 |
| Japan (JIS H5111) | HBsC3 | High Strength Brass Casting 3 |
| ISO | CuZn37Mn3Al2-C | Manganese Bronze Casting |
| China (GB/T 1176) | ZCuZn40Mn3Fe1 | 高强锰黄铜 (Mn Bronze) |
Applications
C86500 / CC765S manganese bronze castings are used for: ship propellers (2–4 blade, diameter 300 mm to 2 m); propeller hubs and shaft coupling flanges; pump impellers, volute casings, and wear rings; worm wheels and spur gear blanks; heavy slide bearings and thrust bearings in machinery; marine windlass drums, gypsy wheels, and deck machinery; hydraulic manifold blocks for high-pressure systems; offshore structural clamps and connectors; and heavy engineering castings for mining, paper mill, and power generation equipment.
Pricing
US$ 11.50 per kilogram (CIF major port, indicative). MOQ: samples from 1 piece; production from 50 pieces.
Quality and Certification
ASTM B584 (C86500); EN 1982 CC765S; IS 318 HTB1; ISO 9001:2015; EN 10204 3.1 MTR; mechanical test certificates. Propeller castings supplied with dimensional and balance reports. ISO 9001:2015. EN 10204 3.1 MTR with every batch.
Related Grades
- C85700 Yellow Brass Casting
- C46400 Naval Brass Casting
- C83600 Red Brass / LG2 Casting
- C86500 Manganese Bronze Casting
- Brass Castings – All Grades
Request a Quote
Price: US$ 11.50/kg. Email: info@elecaccs.com | www.elecaccs.com