What is UNS C63200?
C63200 (UNS C63200) is an American wrought nickel-aluminium bronze supplied to ASTM B150 in the quench-and-tempered condition. It offers high strength, non-sparking behaviour and excellent seawater corrosion resistance, and is used for naval fasteners, seawater valves, pump bodies, wear plates and weapons-handling equipment.
Should you specify UNS C63200?
Specify C63200 when the component is going into a US naval or ASTM-governed supply chain. It is the grade written into MIL-B-24059 and decades of US submarine build documentation, so it clears approval with the least friction on those programmes.
Against C63000, the other common American grade, C63200 trades a little peak strength for better corrosion behaviour in seawater and higher elongation - the ASTM minimum is 18% against 10% for C63000. Choose C63200 where the part sits in flowing seawater; choose C63000 where bearing strength and hardness matter more.
Against DEF STAN 02-833, chemistry and performance overlap closely, but the acceptance route differs. Do not substitute one for the other on a defence order without written customer agreement, even where the property table looks interchangeable.
The main constraint is heat treatment: the quench-and-temper cycle that gives C63200 its corrosion performance has to be done properly and evidenced, which makes mill-sourced material with a full test report worth more than the cheapest bar on the market.
Best for US naval seawater service where ASTM B150 and MIL-B-24059 acceptance and high ductility are required.
UNS C63200 quick reference
The handful of figures buyers compare first. This is a quick reference, not the full specification.
| Property | Quick reference value |
|---|---|
| Tensile strength (spec min) | ≥ 90 ksi (620 MPa) |
| Yield at 0.5% extension (spec min) | ≥ 50 ksi (345 MPa) |
| Elongation (spec min) | ≥ 18 % (4D or thickness) |
| Typical tensile / proof | 630 / 300 N/mm² |
| Condition | Wrought, quench and tempered |
| Corrosion note | Excellent in seawater; non-sparking, heat treatment developed for seawater service |
Overview
Also known as C 63200, C632, Nickel Aluminium Bronze C63200, ASTM B150 C63200.
An American nickel-aluminium bronze with a unique combination of properties resulting in high strength, good fatigue and excellent corrosion resistance in sea water.
C63200 benefits from a quench and temper heat treatment to enhance mechanical properties. The heat treatment was developed to maximise the corrosion resistance in sea water where it is used extensively in marine defence applications. Its non-sparking and wear properties also make it an excellent choice for weapon handling systems.
This nickel-aluminium bronze alloy has a proven track record, having been incorporated in the US submarine build program for many decades, and has now been used for wider applications within the commercial marine and petrochemical industries.
This is a wrought alloy that benefits from extreme consistency in properties, fine uniform grain structure and low cost volumetric inspection. Representative test pieces are taken giving accurate analysis of properties from material to component.
Full certified technical data, mechanical test reports and equivalent specifications are available on copperalloys.net, our technical and manufacturing site.
Key features
Seawater corrosion resistance
Excellent resistance to seawater corrosion, ideal for naval and marine components exposed to salt water.
High strength & non-sparking
High strength with non-sparking behaviour - well-suited to marine defence applications.
Quench-and-tempered
Benefits from a quench-and-temper heat treatment developed to maximise seawater corrosion resistance.
Volumetric inspection
Fine uniform grain structure enables low-cost volumetric inspection with representative test pieces.
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 C63200 technical datasheet on copperalloys.netApplications
Marine Defence / Navy components
- Marine fasteners
- Bolts and nuts
- Weapons handling equipment
- Sonar equipment
- Thrust washers
- Gears
- Control bushes
- Cams
- Seawater valves
- Drive shafts
- Seawater pump bodies
- Non-sparking safety tooling
- Valve stems and seats
- Wear plates
- Welding clamps
- Valve spindles and bearing bushes
Industrial engineering components
- Condenser end plates for steam generation equipment and desalination plants
- Firefighting equipment for offshore platforms
Cast, Wrought
Bar, Rod, Plate, Sheet, Tube, Sections, Rings
Marine, Naval Defence, Aerospace, Petrochemical
Manufacturing ranges
C63200 is available in various formats including rods, bars, blocks, rings, tubes and discs.
Copper Alloys can modify existing alloys like C63200 for improved performance - many customers have benefited from this in the past.
Equivalent specifications
US
European navy specifications
British navy specifications
Welding
Frequently asked questions
Need UNS C63200 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.