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.
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.
Content on this page is compiled from the CW307G datasheet published on copperalloys.net.
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.
Chemical composition (% by weight)
Specification limits from the published standard.
| Element | CW307G |
|---|---|
| Mn | ≤ 1 |
| Al | 8.5–11 |
| Ni | 4–6 |
| P | ≤ 0.02 |
| Sn | ≤ 0.1 |
| Pb | ≤ 0.02 |
| Si | ≤ 0.2 |
| Fe | 3–5 |
| Zn | ≤ 0.02 |
| S | ≤ 0.2 |
| Co | ≤ 0.05 |
| Mg | ≤ 0.2 |
| Nb | ≤ 0.1 |
| Cd | ≤ 0.02 |
| Ag | ≤ 0.2 |
| Ta | ≤ 0.05 |
Mechanical property requirements
Minimum values required by the published specification.
| Property | CW307G |
|---|---|
| Tensile Strength Rm (MPa) | ≥ 620 (ambient) / ≥ 480 (250 °C) |
| 0.2% Proof Stress Rp0.2 (MPa) | ≥ 245 (ambient) / ≥ 212 (250 °C) |
| Elongation (%) | ≥ 15 (ambient) |
Typical mechanical properties
Typical values as published on copperalloys.net - indicative only.
| Property | Value |
|---|---|
| Tensile strength (N/mm²) | 640 |
| Proof / yield strength (N/mm²) | 270 |
| Elongation (%) | 15 |
| Hardness (HB) | 180 |
| Izod impact @ 20 °C (J) | 23 |
Typical physical properties
As published on copperalloys.net for CW307G.
- Nominal composition
- CuAl10Ni5Fe4
- Alloy type
- Wrought
- Density
- 7.58 g/cm³
- Melting temperature range
- 1060 – 1075 °C
- Thermal conductivity
- 38 W/m·K
- Electrical resistivity
- 22 µΩ·m @ 15 °C
- Coefficient of thermal expansion (0–250 °C)
- 40
- Relative magnetic permeability
- 1.5
- Coefficient of friction
- 0.46
Applications
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 in standard bar, rod, plate, sheet, tube, sections and ring forms.
Copper Alloys has the ability to modify CW307G for improved performance - many customers have benefited from this in the past.
Equivalent specifications
European (EN & DIN)
British
US
Frequently asked questions
What is CW307G equivalent to?+
CW307G (CuAl10Ni5Fe4) is closely equivalent to CA104 and UNS C63000, with similar mechanical properties and corrosion resistance.
Where is CW307G typically used?+
CW307G is specified across aerospace, marine, power generation and industrial sectors - including bearings, bushings, valves, pump parts, landing gear bushes, ship propellers and heat exchanger components.
What are CW307G's typical mechanical properties?+
Typical tensile strength 640 N/mm², proof/yield strength 270 N/mm², elongation 15%, Brinell hardness 180 HB and Izod impact 23 J at 20 °C.
Discuss your CW307G requirements
Copper Alloys Ltd manufactures Nickel-Aluminium Bronze to CW307G - from stocked bar, rod and rings to fully-machined components and shaped forgings up to 20,000 kg piece weight.
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.