UNS C95800 Nickel Aluminium Bronze Flanges Manufacturer & Exporter

UNS C95800 at a glance

• Cast nickel aluminium bronze (Cu-Al-Ni-Fe-Mn), NAB
• Minimum 85 ksi tensile, 35 ksi yield, 15 % elongation per ASTM B148
• Seawater, marine, offshore and desalination service
• Machinability rating 20: carbide tooling and rigid set-ups

Material Overview and Designation

Chemical Composition

Mechanical Properties

Physical and Fabrication Properties

Corrosion Characteristics and Service

In seawater C95800 forms a thin, adherent oxide film that stays protective in flowing water, and the alloy resists the erosion-corrosion and cavitation that damage many other copper alloys at pumps, valves and bends. Copper alloys also resist the settlement of marine macro-fouling better than steels do. These properties are the reason nickel aluminium bronze is used for ship propellers, seawater pumps, valve bodies and seawater piping components.

Corrosion resistance in castings depends on microstructure. Cooling rate and any heat treatment after welding or repair affect selective phase attack in seawater, so specifications for critical seawater service commonly set heat-treatment and repair requirements. Follow the requirements stated in your project specification. Galvanic coupling to steel bolting and to less noble metals should be assessed in the design.

Manufacturing and Machining

The 20 machinability rating means slower cutting rates than other bronzes. Rigid set-ups, sharp carbide tooling, positive cutting geometry and generous coolant keep dimensional accuracy and finish under control on face, bore and bolt-hole operations. We plan machining allowance and sequence accordingly, particularly on larger flanges.

C95800 is weldable with matching filler by qualified procedures, and weld repair of castings is a normal practice when the specification permits it, followed by any heat treatment the specification requires. Sand castings, centrifugal castings and continuous-cast bar are all used as flange stock depending on diameter, quantity and specification.

C95800 flange manufacturer

Sunflex Metalloy is a C95800 flange manufacturer for marine, offshore and industrial customers. UNS C95800 flanges are made in the slip-on, blind, lap joint, loose, plate, socket-weld and custom styles. C95800 nickel aluminium bronze flanges are supplied to the specification on your order: ASTM B148, a project specification or MIL-B-24480 where it applies, with the documents and testing the order lists.

UNS C95800 Flanges and Applications

C95800 flanges are the right alloy when a project specification names nickel aluminium bronze for seawater duty: seawater cooling, fire-main and ballast systems, desalination plants, offshore platforms, shipbuilding and marine pumps and valves. They are produced as slip-on, blind, lap-joint, loose, plate, socket-weld and special flanges.

• Seawater cooling, circulating and fire-main systems
• Shipbuilding and marine machinery
• Offshore platforms and support vessels
• Desalination plants
• Seawater pumps and valves

Inspection and Documentation

Material is verified against UNS C95800 and the applicable casting specification (ASTM B148 or the project specification), and an MTC is issued where required. Dimensional inspection covers OD, thickness, bore, PCD and hole pattern; surfaces and gasket faces are examined visually. For critical seawater service, liquid penetrant or radiographic examination, mechanical tests and heat-treatment records are provided when the purchase order calls for them.

Applicable Standards