C94700: Nickel-Tin Bronze for Strength, Wear Resistance, and Corrosion Resistance
C94700. also known as Spinodal bronze or Nickel-aluminum bronze D, is a copper alloy belonging to the
nickel-tin bronze family. It's known for its exceptional combination of high strength, excellent wear
resistance, and good corrosion resistance. Here's a breakdown of its key properties:
Table: Key Properties of C94700
| Property |
Description |
| Chemical Composition |
- Primarily Copper (Cu): 88-90% <br> - Nickel (Ni): 8-10% <br> - Tin (Sn): 6-8%
<br> - Other (Fe, Pb, etc.): Trace amounts (Lead-free variants available)
|
| Mechanical Properties |
- High tensile and yield strength <br> - Excellent wear resistance <br> - Good
machinability (especially lead-free variants) <br> - Good corrosion resistance
|
| Common Brands (By Country) |
- Europe: CuNi10Sn8 [Europe], Hardiall® <br> - US: Toughmet, AMS
4596
|
Important Note: The presence of lead (Pb) can vary depending on the specific variant. Some
manufacturers offer lead-free versions. Always check the datasheet for the material you're considering.
Common Questions and Answers:
What are the typical applications of C94700?
C94700 finds use in various industries due to its well-rounded properties:
Gears: High-strength gears, particularly for medium- to high-load applications, can be made
from C94700.
Bearings and bushings: In applications with demanding loads and wear requirements, C94700
is a suitable choice for bearings and bushings.
Wear plates and liners: Industrial machinery can benefit from C94700's exceptional wear
resistance.
Marine applications: Due to its good corrosion resistance in saltwater environments, C94700
can be used for valves, fittings, and other marine hardware.
How does C94700 compare to other copper alloys?
C94700 offers several advantages:
Excellent combination of properties: It provides a balance of high strength, wear
resistance, and good corrosion resistance, making it suitable for demanding applications.
Good machinability: Compared to some copper alloys with high nickel content, C94700 offers
good machinability, especially lead-free variants.
Are there alternatives to C94700?
Depending on the specific application requirements, some alternative copper alloys can be considered:
High-aluminum bronze (e.g., C95800): Offer excellent wear resistance but might have
slightly lower strength and be more expensive.
High-strength brasses (e.g., C69300): Can provide good strength and wear resistance, but
corrosion resistance might be lower than C94700.
Important Note: Regulations on lead usage can influence the availability of leaded variants
of C94700. Lead content and cost should be factors when choosing a material. Always consult with a material
engineer or supplier to identify the most suitable copper alloy for your specific application considering
factors like strength, wear resistance, corrosion resistance, machinability, lead content (regulations), and
cost.
