C87800 brass thick-wall copper pipes are high-manganese casting brass tubes containing approximately 80% copper and 13%–15% manganese, which impart outstanding tensile strength and exceptional wear resistance. This alloy composition enables the pipes to withstand heavy loads and continuous friction, making them a preferred choice for demanding mechanical components such as worm gears, lead screws, and heavy-duty bushings. Additionally, the high copper content provides excellent corrosion resistance against seawater, steam, and mild acidic environments, ensuring long-term reliability even in aggressive fluid-handling applications.
The thick-wall construction of these pipes delivers superior structural rigidity and dimensional stability under extreme pressure conditions, effectively preventing deformation during high-stress operations. At the same time, the material offers good castability and machinability, allowing for precision manufacturing of thick-wall tubes with tight dimensional tolerances. These combined attributes make C87800 thick-wall pipes ideally suited for high-pressure valve stems, pump housings, marine piping systems, and other industrial equipment where strength, durability, and corrosion resistance are simultaneously required.
| CATEGORY | PARAMETER | SPECIFICATION / VALUE |
|---|---|---|
| General Information | Material Designation | UNS C87800 / ASTM B30 |
| Material Type | High-Manganese Casting Brass (Manganese Bronze) | |
| Product Form | Thick-Wall Seamless / Centrifugal Cast Tubes | |
| Manufacturing Standard | ASTM B30, SAE J461, J462 | |
| Available Lengths | Standard: 3m, 6m, 12m / Custom lengths up to 6m | |
| Appearance / Color | Reddish-brown to dark bronze (not bright yellow) | |
| Chemical Composition | Copper (Cu) | 80.0% – 83.0% |
| Zinc (Zn) | Remainder (approx. 2.0% – 5.0%) | |
| Manganese (Mn) | 13.0% – 15.0% | |
| Silicon (Si) | 1.0% – 2.0% | |
| Aluminum (Al) | 0.5% – 1.0% | |
| Iron (Fe) | ≤ 0.4% | |
| Tin (Sn) | ≤ 0.2% | |
| Lead (Pb) | ≤ 0.05% | |
| Physical Properties | Density | 7.9 g/cm³ (0.285 lb/in³) |
| Melting Point | 860°C – 900°C (1580°F – 1652°F) | |
| Thermal Conductivity | 52 W/m·K (360 BTU·in/hr·ft²·°F) | |
| Electrical Conductivity | 12% IACS (approx.) | |
| Coefficient of Thermal Expansion | 18.5 × 10⁻⁶ /°C (20°C – 300°C) | |
| Mechanical Properties | Tensile Strength (Ultimate) | ≥ 550 MPa (80,000 psi) |
| Yield Strength (0.5% Extension) | ≥ 310 MPa (45,000 psi) | |
| Elongation (in 2″) | ≥ 15% | |
| Hardness (Brinell) | 170 – 220 BHN | |
| Modulus of Elasticity | 110 GPa (16,000 ksi) | |
| Impact Strength (Charpy) | 15 – 25 J (approx.) | |
| Dimensional Specifications | Outside Diameter (OD) Range | 1/2″ – 24″ (12.7mm – 609.6mm) |
| OD Tolerance (≤ 2″) | ±0.005″ (±0.13mm) | |
| OD Tolerance (2″ – 6″) | ±0.010″ (±0.25mm) | |
| OD Tolerance (6″ – 12″) | ±0.015″ (±0.38mm) | |
| OD Tolerance (12″ – 24″) | ±0.020″ (±0.51mm) | |
| Wall Thickness (WT) Range | 1/8″ – 2″ (3.2mm – 50.8mm) | |
| WT Tolerance (≤ 1/2″) | ±0.010″ (±0.25mm) | |
| WT Tolerance (> 1/2″) | ±0.015″ (±0.38mm) | |
| Length Tolerance | ±1/8″ (±3.2mm) for cut-to-length | |
| Straightness | ≤ 1.0mm per meter (0.012″ per foot) | |
| Roundness (Out-of-Round) | ≤ 0.5% of nominal OD | |
| Concentricity | ≤ 0.010″ TIR (Total Indicator Reading) | |
| Surface Treatment | As-Cast Surface | Roughness Ra ≤ 12.5µm (500µin) |
| Machined Surface (Optional) | Roughness Ra ≤ 3.2µm (125µin) | |
| Polished Surface (Optional) | Roughness Ra ≤ 0.8µm (32µin) | |
| Surface Coating (Optional) | Anti-corrosion oil coating / Clear lacquer | |
| Surface Defects | No cracks, porosity, or inclusions exceeding 0.5mm depth | |
| Heat Treatment | Stress Relieving (Optional) | 250°C – 300°C for 1–2 hours, air cool |
| Annealing (Not Typical) | 550°C – 600°C, furnace cool (for softening only) | |
| Hardening | Not applicable (non-heat-treatable alloy) | |
| Recommended Preheating for Welding | 150°C – 200°C (if welding required) | |
| Quality & Testing | Tensile Test | Per ASTM E8 / E8M |
| Hardness Test | Per ASTM E10 (Brinell) | |
| Chemical Analysis | Per ASTM E527 (Optical Emission Spectrometry) | |
| Dimensional Inspection | Per ASTM B30 | |
| Pressure Test (Optional) | Hydrostatic up to 20 MPa (3,000 psi) | |
| NDT (Optional) | Ultrasonic or X-ray inspection per customer request | |
| Certification | Mill Test Report (MTR) per EN 10204 3.1 or 3.2 | |
| Applications | Typical Uses | Valve stems, worm gears, high-pressure pump housings, marine fittings, lead screws, heavy-duty bushings, fluid power systems |
| Packaging | Standard Packaging | Plastic end caps + moisture-proof wrapping + wooden crates |
| Marking | Material grade, heat number, size, and manufacturer’s logo stenciled on each pipe or bundle |
