Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of C28900 Brass Alloy (CuZn31Si) | High-Strength Silicon Brass Rod & Tube Supplier in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
C28900 Brass, also known as Arsenical Admiralty Brass, High-Strength A-Brass, UNS C28900 Brass, is globally searched for its excellent corrosion resistance, dezincification resistance, and strong performance in heat-exchanger and condenser applications. Common searches include C28900 Brass Tube, C28900 Brass Sheet, Admiralty Brass Plate, Arsenical Brass Coil, and UNS C28900 Condenser Tubes. This page provides complete specifications, chemical composition, and export-ready data for international sourcing.
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Product Overview
C28900 Brass Alloy (also known as CuZn31Si silicon brass) is a high-performance copper-zinc-silicon alloy designed for enhanced strength, improved wear resistance, and excellent corrosion behavior, especially in marine and industrial environments.
Compared with standard brass alloys (such as C26000 and C28000), C28900 provides:
Higher mechanical strength
Better anti-dezincification performance
Improved machinability
Excellent stability under stress and vibration
It is widely used in engineering components, marine hardware, precision mechanical parts, and electrical connectors.
Products Description
Product Name: C28900 Brass Alloy
Alias: Arsenical Admiralty Brass, Admiralty Brass, A-Brass
Standards: ASTM B111 / B135 / B36
Forms: Tube, Sheet, Plate, Strip, Coil, Rod
Specifications (Metric & Imperial)
| Form | Thickness / OD | Width | Length | Tolerance |
|---|---|---|---|---|
| Tube | OD 6–120 mm | WT 0.5–10 mm | 1000–8000 mm | ±0.02–0.10 mm |
| Sheet / Plate | 0.3–40 mm (0.012–1.57") | 20–2000 mm | 1000–6000 mm | ASTM / EN |
| Strip / Coil | 0.05–2.5 mm | 5–600 mm | Coil Form | ±0.01–0.05 mm |
| Rod / Bar | 3–80 mm | - | 1000–6000 mm | H9–H11 |
Chemical Composition (UNS C28900)
| Element | Content (%) |
|---|---|
| Copper (Cu) | 70.0–73.0 |
| Zinc (Zn) | Balance |
| Arsenic (As) | 0.02–0.06 |
| Lead (Pb) | ≤0.05 |
| Iron (Fe) | ≤0.07 |
| Others | ≤0.20 |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.53 g/cm³ |
| Melting Range | 900–940°C |
| Thermal Conductivity | 116 W/m·K |
| Electrical Conductivity | ~28% IACS |
| Thermal Expansion (20–300°C) | 19.5 × 10⁻⁶ /K |
| Elastic Modulus | 110 GPa |
| Poisson's Ratio | 0.33 |
Mechanical Properties (Typical)
| Property | Annealed (O) | Half Hard (H02) | Hard (H04) |
|---|---|---|---|
| Tensile Strength | 300–380 MPa | 380–450 MPa | 450–520 MPa |
| Yield Strength | 90–150 MPa | 200–280 MPa | 280–350 MPa |
| Elongation | 30–45% | 10–20% | 5–12% |
| Hardness (HV) | 60–90 | 95–130 | 130–165 |
Products Features
Excellent resistance to corrosion in fresh & seawater
Arsenic improves dezincification resistance
Stable thermal properties for heat-exchanger systems
Good cold- and moderate hot-working performance
Anti-fouling properties suitable for condenser applications
Good thermal conductivity and mechanical stability
Heat Treatment & Processing
Hot forming temperature: 700–800°C
Annealing: 450–600°C
Cold working: Excellent work hardening behavior
Machining: Recommended carbide tooling for precision finishing
Products Applications
Heat exchanger & condenser tubes
Seawater cooling systems
Power plant condensers
Radiator tubes
Marine hardware & fittings
Plumbing and piping components
Industrial heat-transfer equipment
Inspection & Quality Assurance
Full chemical composition test using spectrometer
Eddy current and hydrostatic testing for tubes
Surface roughness, dimensional tolerance & straightness inspection
Mechanical property testing (tensile, hardness, elongation)
Grain size and microstructure analysis
Third-party inspection available (SGS / TUV / BV)
EN10204 3.1 MTC with full traceability
Product Delivery Standards
Moisture-proof export packaging
Tube ends capped, bundled, and wrapped
Sheets & strips with protective film
Wooden pallets or crates for ocean shipping
Custom labeling, packing lists, and certificates
Fast shipment for standard condenser tube sizes
Why Choose Our C28900 Brass Alloy
Stable factory production with strict QC system
Full size range availability (rod, tube, sheet)
Fast global shipping capability
OEM & custom machining support
Competitive factory pricing
Looking for a reliable supplier of C28900 Admiralty Brass for condenser and marine applications?
Contact our team for professional recommendations, fast quotation, and technical support.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ
Q1: What is the main advantage of C28900 Admiralty Brass?
Its excellent corrosion resistance, especially in seawater and condenser applications.
Q2: How is C28900 different from C28000 or C26000?
C28900 contains arsenic, giving it higher resistance to dezincification and improved marine performance.
Q3: Is C28900 suitable for seawater condenser tubes?
Yes, it is one of the most commonly used materials for heat exchanger and seawater cooling systems.
Q4: What tempers are available for C28900 tubes and sheets?
Typical tempers include O, 1/4H, 1/2H, H, depending on product form.
Q5: Can C28900 Brass be welded?
Yes, it supports soldering and brazing; welding requires careful control to avoid zinc loss.
Q6: Do you provide hydrostatic and eddy current testing for tubes?
Yes-both tests are available and recommended for heat-exchange service.
Q7: Can you supply cut-to-length condenser tubes?
Yes, customized cutting, deburring, and end-forming services are available.
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