UNS C61000 low-iron aluminum bronze combines high tensile toughness and excellent anti-seizure property, ideal for heavy-load friction and marine anti-corrosion component manufacturing.
UNS C61000 is a classic low-iron wrought aluminum bronze alloy regulated by ASTM B150, ASTM B124 and ASTM B169 industrial standards. This copper-aluminum alloy is produced via hot forging, hot rolling and cold drawing processes, available in bar, plate, strip, seamless pipe and custom forging blanks for mechanical and marine engineering applications.
Different from high-iron aluminum bronze grades, C61000 strictly restricts iron content below 0.50%, which effectively eliminates galvanic corrosion risk when exposed to seawater, brine and weakly acidic liquid media. The alloy matrix is single-phase alpha bronze with balanced ductility and mechanical strength, avoiding brittle intermetallic phases that cause cracking under cyclic impact loads.
Manufacturers globally adopt UNS C61000 to replace common brass and tin bronze for harsh service environments including offshore marine equipment, mining hydraulic assemblies, chemical corrosion-resistant piping fittings and heavy-load bearing sliding pairs. Its integrated anti-wear, anti-corrosion and anti-seizure performance drastically reduces component replacement frequency and overall equipment operation cost.
UNS C61000 aluminum bronze delivers comprehensive mechanical, chemical and processing advantages unmatched by conventional copper alloys, fully covering high-abrasion and marine anti-corrosion working requirements:
Copper plus silver serves as residual matrix element; total miscellaneous impurity content shall not exceed 1.30% by weight. All raw material ingots pass spectral analysis inspection before production.
| Alloy Element | Standard Content Range | Functional Description |
|---|---|---|
| Cu + Ag | 90.00 ~ 93.00 (Remainder) | Base matrix, provides basic ductility, thermal conductivity and corrosion resistance foundation |
| Aluminum (Al) | 6.00 ~ 8.50 | Primary strengthening element, forms dense Al₂O₃ passivation film to resist abrasion and chemical corrosion |
| Iron (Fe) | ≤ 0.50 | Grain refiner; low upper limit prevents seawater galvanic pitting corrosion |
| Zinc (Zn) | ≤ 0.20 | Controlled trace impurity, eliminates hot rolling brittleness risk |
| Lead (Pb) | ≤ 0.02 | Ultra-low lead content, guarantees clean welding and meets marine eco-specifications |
| Silicon (Si) | ≤ 0.10 | Restricted to avoid casting porosity and welding slag generation |
| Single Other Impurity | ≤ 0.05 | Strict single-element control to stabilize alloy uniform microstructure |
| Total All Impurities | ≤ 1.30 | Total impurity ceiling for consistent mechanical and anti-corrosion performance |
All UNS C61000 semi-finished products follow standardized smelting, forming and heat treatment workflows to guarantee uniform grain structure and stable batch performance. Each production stage carries independent inspection records attached to final MTR material test report:
Three mainstream delivery tempers cover soft forming, medium hot-forged and high-strength hard-drawn states for different machining and service scenarios.
Compared to standard copper alloys, C61000 offers enhanced fatigue resistance and anti-galling properties, making it ideal for high-load and friction applications.
| Delivery Temper | Minimum Tensile Strength (MPa) | Minimum Yield Strength Rp0.2 (MPa) | Minimum Elongation A (%) | Standard Brinell Hardness HB |
|---|---|---|---|---|
| O – Fully Annealed Soft State | 480 | 205 | 25 | 140 ~ 160 |
| M – Hot Rolled / Hot Forged State | 500 ~ 650 | 250 ~ 400 | 15 ~ 22 | 150 ~ 180 |
| H – Cold Drawn Hard State | 620 | 450 | ≤ 10 | 180 ~ 220 |
We supply full-series UNS C61000 semi-finished copper alloy stock with regular dimensions kept in warehouse, plus fully custom machined blanks and finished mechanical components against customer drawings.
All dimensional tolerances comply with ASTM B150 bar, ASTM B124 plate and ASTM B169 pipe tolerance standards; tighter precision tolerances can be customized for high-precision machining clients.
To form complete wear-resistant and anti-corrosion component solutions, we supply complementary aluminum bronze alloy grades and finished machined parts together with UNS C61000 raw stock:
| Material Grade | Main Matching Usage | Matched Assembly Position with C61000 |
|---|---|---|
| UNS C95400 High Iron Aluminum Bronze Casting | Heavy casting valve bodies, large bearing housings | Mated with C61000 machined shaft sleeves and sliding bushes |
| UNS C63000 High Strength Aluminum Bronze | Ultra-high impact structural forgings | Paired with C61000 sliding friction secondary parts |
| ERCuAl-A1 Welding Filler Wire | Welding repair and component assembly welding | Dedicated welding consumable for UNS C61000 joints |
| C61000 Machined Bearing Bush | Ready-to-install wear sleeve finished parts | Direct replacement assembly for mining/marine equipment |
UNS C61000 low-iron aluminum bronze targets industrial sectors requiring combined wear resistance and saltwater/chemical corrosion protection, covering energy, marine, mining, metallurgy and chemical processing fields:
Compared with common brass, tin bronze and high-iron aluminum bronze, UNS C61000 balances marine corrosion resistance, wear life and comprehensive cost efficiency, especially superior in saltwater working media:
In long-cycle marine equipment projects, C61000 components reduce annual replacement frequency by over 80% compared with brass and tin bronze alternatives, offsetting slightly higher initial material procurement cost within 1–2 years of operation.
UNS C61000 has clear process parameters for cutting, welding, hot forming and cold bending, standard operation ensures finished component surface quality and internal performance stability:
Machinability index reaches 20 (benchmark C36000 free-cut brass = 100). Adopt coated carbide cutting tools with sufficient coolant supply to avoid tool built-up edge. Hard temper H state bars deliver smoother surface finish for precision turning and grinding.
Primary choice: GTAW TIG welding with ERCuAl-A1 matching filler wire; secondary process SMAW manual arc welding with aluminum bronze coated electrodes. Avoid oxy-fuel gas welding, which generates thick brittle oxide layers at weld joints. Preheat workpiece to 150–200°C for thick-wall material welding to prevent cold cracking.
Hot forging and hot rolling temperature window: 850°C – 950°C, slow cooling after forming to release internal stress. O annealed temper supports cold bending, stamping and flanging; H hard temper is not suitable for large plastic deformation to avoid surface cracking.
Available surface treatments: Mechanical polishing, passivation anti-tarnish coating, nickel/chrome electroplating for low-friction surface enhancement. Passivation treatment greatly improves atmospheric salt mist anti-corrosion lifespan for outdoor exposed parts.
The metallurgical formula of UNS C61000 is optimized specifically for friction-corrosion composite working conditions, with multiple built-in design strengths unmatched by other copper alloy grades:
Single-phase alpha microstructure eliminates hard brittle kappa intermetallic precipitates existing in high-iron aluminum bronze, so the alloy maintains stable ductility under repeated impact load without spontaneous cracking. The limited iron content formula removes galvanic corrosion points that accelerate metal erosion in conductive saltwater media.
Naturally formed thin aluminum oxide passive film instantly regenerates if scratched during equipment operation, continuously isolating the alloy substrate from abrasive and corrosive media without additional protective coating maintenance. Moderate aluminum content balances wear resistance and material toughness, avoiding the extreme brittleness of ultra-high aluminum bronze grades.
Homogeneous wrought forming technology delivers consistent performance across full workpiece cross-section, unlike casting bronze which contains internal shrinkage porosity defects that shorten component service life under cyclic pressure and impact.
Each furnace batch of UNS C61000 alloy undergoes complete multi-stage testing before shipment; all test records are compiled into official MTR Material Test Report delivered together with goods, supporting third-party inspection acceptance for engineering and marine projects:
Besides standard semi-finished C61000 bar, plate and pipe stock, we provide full customization service covering raw material cutting, precision CNC machining, assembly component finishing and engineering technical support for global industrial clients:
Our engineering technical team analyzes customer working condition parameters including medium abrasiveness, operating temperature, pressure load and corrosion medium to recommend optimal product form, temper state and blank size. Custom service covers non-standard diameter bars, special thickness plates, irregular shape forged blanks and finished machined bearing bushes, valve trim, sliding sleeves per customer CAD drawings.
Extended supporting service scope includes on-site working condition technical consultation, installation matching dimensional design guidance, post-delivery processing technical support and long-term batch stable supply contract for large engineering projects. Small sample trial order service is supported before mass bulk procurement to verify material performance on customer equipment.
All UNS C61000 alloy products adopt dedicated anti-scratch, moisture-proof packaging to prevent surface oxidation and collision damage during sea and land cross-border long-distance transportation:
Small-diameter bars and thin plate sheets are wrapped with anti-tarnish paper and packed into solid export wooden crates with foam cushion protection. Large-size bars, thick plates and seamless pipes are bundled with steel strapping, equipped with plastic end caps to protect pipe inner wall finish. Each single packing unit carries printed label clearly marked with UNS C61000 grade, furnace heat number, batch number, dimension specification, delivery temper and production date for easy customer incoming inspection traceability.
We support FOB, CFR, CIF international trade delivery terms, arranging sea freight, air freight and land truck transport according to client destination country and delivery schedule demand. Complete export document set including commercial invoice, packing list, official MTR material test certificate and customs declaration file is supplied together with shipment cargo to clear overseas customs smoothly.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
A half pipe sleeve is a piping device, which is placed on a pipe to protect it against the aliments.
Read moreSnap rings are used in conjunction with boiler tubes erosion shields, which is a clip that easily installs boiler tubes erosion shields to the tube.
Read moreA stainless boiler tube shield is a piping device, which is placed on a pipe to protect it against the aliments.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
When you partner with Sunny Steel, you can stop worrying about meeting deadlines thanks to our responsive and timely service. You'll also say goodbye to unnecessary shopping around. Instead, you'll get white glove service from an expert who understands your needs and can get you the materials you need quickly.
