What is CW307G?
CW307G (CuAl10Ni5Fe4) is the European EN designation for wrought nickel-aluminium bronze. It combines high strength, strong wear and fatigue performance and good seawater corrosion resistance, and is specified for bearings, bushings, valves, pump parts, propeller components and heat-exchanger hardware.
Should you specify CW307G?
Specify CW307G when the drawing, project or customer works to EN or DIN standards. It is the grade you will find called up across European marine, power-generation and industrial equipment, and it is supplied in the widest range of standard wrought forms.
Against C63000, its closest American counterpart, the properties are near-identical and the choice is a documentation decision rather than a metallurgical one. Against CA104 and BS B23 it is likewise closely equivalent, which makes CW307G the practical replacement when an older British designation is obsolete on a drawing.
Against DEF STAN 02-833, CW307G is the commercial rather than the defence route. It is quicker and cheaper to source for industrial work, but it does not carry naval acceptance, so do not offer it as a like-for-like on a defence order.
The trade-off is that broad EN composition limits allow more variation between suppliers than a tight defence specification does, so where fatigue or wear life is critical, buy against a test report rather than the standard alone.
Best for European industrial, marine and power equipment where EN or DIN documentation and wide form availability matter.
CW307G 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 (ambient) / ≥ 480 MPa at 250 °C |
| 0.2% proof stress Rp0.2 (spec min) | ≥ 245 MPa (ambient) / ≥ 212 MPa at 250 °C |
| Elongation (spec min) | ≥ 15 % (ambient) |
| Typical hardness | 180 HB |
| Typical Izod impact | 23 J at 20 °C |
| Corrosion note | Good corrosion resistance including seawater service |
Overview
CW307G Aluminium Bronze (CuAl10Ni5Fe4) is a high-strength nickel-aluminium bronze alloy widely used in demanding engineering applications where exceptional wear resistance, corrosion performance and mechanical strength are required. Known for its ability to withstand heavy loads, shock and abrasive conditions, CW307G is commonly specified across aerospace, marine, power generation and industrial sectors. The addition of aluminium, nickel and iron enhances both strength and durability, while maintaining good toughness and resistance to seawater corrosion - making it an ideal choice for bearings, bushings, valves and pump parts operating in harsh environments.
Copper Alloys Ltd supplies CW307G from UK stock in bar, rod, forgings and machined components, with full material traceability. We can cut to size, tailor mechanical properties and deliver against EN, DIN and customer-specific documentation.
CW307G (CuAl10Ni5Fe4) is closely equivalent to CA104 and UNS C63000, with similar mechanical properties and corrosion resistance. It belongs to the nickel-aluminium bronze family, alongside alloys such as C63200 and C95500, which may be selected depending on specific strength, casting or wear requirements.
Full certified technical data, mechanical test reports and equivalent specifications are available on copperalloys.net, our technical and manufacturing site.
Key features
Wear resistance
Excellent wear performance for bearings, bushings and heavily loaded surfaces.
Fatigue resistance
Strong fatigue performance for cyclically loaded components.
Corrosion resistance
Good corrosion resistance including in seawater environments.
High mechanical properties
High strength for demanding structural and pressure duties.
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 CW307G technical datasheet on copperalloys.netApplications
Industrial
- Plunger tips
- Corrosion-resistant articles
- Hydraulic bushings for earth moving equipment
- Valve balls
- Bushings
Power
- Condenser tube for power stations and desalination units
- Shafting
- Pump parts
- Cams
- Gears
- Heat exchanger flanges
- Heat exchanger headers
- Tanks
- Welded piping systems
Aerospace
- Landing gear bushes and bearings
- Wing flap bearings
Automotive
- Valve guides and seats
Marine
- Nuts
- Ship propellers
- Pump parts
- Bolts
- Impellers
- Valves and valve stems
Cast, Wrought
Bar, Rod, Plate, Sheet, Tube, Sections, Rings
Marine, Naval Defence, Petrochemical, Power
Manufacturing ranges
CW307G is a wrought Nickel-Aluminium Bronze supplied from UK stock in standard bar, rod, plate, sheet, tube, sections and ring forms. Customised shaped forgings and finish-machined components are also available.
Copper Alloys Ltd offers fast quotes, cut-to-size supply and tailored mechanical properties beyond the standard specification to meet special requirements.
Equivalent specifications
European (EN & DIN)
British
US
Frequently asked questions
Need CW307G 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.