What is UNS C63000?
C63000 (UNS C63000) is a high-strength American wrought nickel-aluminium bronze. Its strength, fatigue life, shock resistance and outstanding anti-galling behaviour under load make it the world standard for aerospace landing-gear bushes and bearings, as well as marine fasteners, gears, thrust washers and control bushes.
Should you specify UNS C63000?
Specify C63000 when the duty is heavily loaded sliding or bearing contact. Its anti-galling behaviour against mating steel components under load is the property most engineers actually buy it for, and it holds that behaviour at both cryogenic and moderately elevated temperatures.
Against C63200, C63000 runs higher in strength and hardness but lower in specified elongation, and its seawater corrosion performance is good rather than best-in-class. That makes it the better bush and bearing material and the weaker choice for a part sitting permanently in flowing seawater.
Against CW307G, the European grade it closely mirrors, the difference is almost entirely paperwork: CW307G is called up by EN standards, C63000 by ASTM and AMS. Pick whichever your drawing references and keep the certification consistent through the build.
Plan for the machining rate. C63000 has a machining index of around 20 against free-machining brass at 100, so quoting it on brass cycle times will understate cost.
Best for aerospace landing-gear bushes, bearings and heavily loaded anti-galling duty to ASTM or AMS documentation.
UNS C63000 quick reference
The handful of figures buyers compare first. This is a quick reference, not the full specification.
| Property | Quick reference value |
|---|---|
| Tensile strength Rm (spec min) | ≥ 620 MPa |
| 0.2% proof stress Rp0.2 (spec min) | ≥ 235 MPa |
| Yield at 0.5% extension (spec min) | ≥ 250 MPa |
| Elongation (spec min) | ≥ 10 % in 50 mm |
| Typical hardness | 180 - 240 HB |
| Corrosion note | Good corrosion resistance; immune to biofouling and hydrogen embrittlement |
Overview
An American nickel-aluminium bronze whose unique combined properties of high strength, good fatigue, excellent corrosion resistance in sea water, non-sparking and wear properties make it a popular choice across the whole spectrum of industry.
It has very high anti-galling properties under load and is used on a world basis for aerospace landing gear bushes and bearings where its strength, fatigue, wear properties, shock resistance and corrosion resistance are well proven.
Full certified technical data, mechanical test reports and equivalent specifications are available on copperalloys.net, our technical and manufacturing site.
Key features
Corrosion resistance
Good resistance to corrosion.
Hydrogen embrittlement immunity
Immune to hydrogen embrittlement.
Biofouling immunity
Immune to bio-fouling.
Uniformity of properties
Uniform mechanical properties across the section.
Anti-galling
Anti-galling behaviour under load against mating components.
Need the full chemistry and mechanical test data?
Full certified technical data, mechanical test reports and equivalent specifications are available on copperalloys.net, our technical and manufacturing site.
View the full UNS C63000 technical datasheet on copperalloys.netApplications
Typical uses
- Marine fasteners, hardware and fittings
- Aerospace landing gear components
- Thrust washers
- Gears
- Control bushes
- Faucet balls
Also suitable for
- Non-sparking safety tooling
- Valve stems and seats
- Wear plates
- Welding clamps
- Valve spindles and components
- Fasteners and bearing bushes
- Firefighting equipment for offshore platforms
Cast, Wrought (forged)
Bar, Rod, Plate, Sheet, Tube, Sections, Rings
Aerospace, Marine, Naval Defence, Petrochemical
Manufacturing ranges
With very little limitation on size, C63000 is available as standard in rod, bar, blocks, rings, tubes and discs up to a piece weight of 4,500 kg / 9,900 lbs.
Copper Alloys is also regularly making customised shaped forgings and can increase piece weight up to 20,000 kg / 44,000 lbs.
Copper Alloys Ltd also offers finished machined components in all alloys, complete project management and tailored mechanical properties beyond those of the specification to meet special requirements.
Joining & welding
Recommended welding processes.
- Tungsten inert gas (TIG) / gas tungsten arc (GTAW)
- Metal inert gas (MIG) / gas metal arc (GMAW)
- Manual arc (MMA)
- Friction welding
- Laser welding
- Brazing (possible with special fluxes)
- Soldering or oxy-acetylene - not recommended
Equivalent specifications
US
European
Frequently asked questions
Need UNS C63000 for your project?
Our UK sales team can confirm availability, lead times, certification and the best specification for your application. Send an enquiry and we will come back to you with next steps.
Information provided is for reference only
All chemical, mechanical, production, product-form and industry figures on this page are indicative estimates compiled for general reference and to aid early-stage material selection. They are not engineering, procurement, safety, regulatory or design advice and must not be relied upon as such.
Before specifying, purchasing or using any material, confirm the requirements against the current controlled version of the relevant standard and obtain a certified material test report and written technical confirmation from Copper Alloys Ltd or another qualified foundry. Copper Alloys Ltd accepts no liability for any loss or damage arising from reliance on the information presented on this page.