CNC · Metal

CNC Bronze Alloys

CNC Bronze Alloys are a class of alloy materials containing copper base, usually composed of copper (Cu) with elements such as tin (Sn), aluminum (Al), phosphorus (P), silicon (Si) or manganese (Mn). These alloys have good mechanical properties, wear resistance, corrosion resistance and excellent machinability, and are widely used in industrial manufacturing.

Wear Resistance

Corrosion Resistance

Excellent Machinability

cnc-bronze-alloys

Lead Time

5~7 days

Density

8.7-8.9 g/cm³

Typical Tolerance

±0.1 mm

Max Size

3600 x 2500 x 600 mm

Material Profile

Why Bronze Alloys Make Sense for CNC Machining

Excellent wear resistance

Bronze alloys offer low friction and strong wear resistance, making them ideal for bushings, bearings, gears, and sliding components.

Good corrosion resistance

Bronze performs well in seawater, humid environments, and outdoor applications, especially compared with many plain steels.

High strength and toughness

Many bronze grades provide good mechanical strength and impact resistance for heavy-duty mechanical parts.

Good machinability

Bronze alloys are suitable for CNC machining of precision parts that require stable dimensions and smooth bearing surfaces.

Performance Snapshot

Material Characteristics at a Glance

Relative performance profile across key engineering parameters. Values are contextual — not absolute stress ratings.

Detail

Medium

Source score: 3/5

Strength

Excellent

Source score: 5/5

Flexibility

Low

Source score: 2/5

Benefits

  • Excellent Machinability
  • High Corrosion Resistance
  • High Strength and Durability
  • Aesthetic Appeal and Anti-Microbial Properties

Limitations

  • High Material Cost
  • Bronze is denser and heavier than aluminum and many steels.
  • Limited Strength Compared to Some Metals

Technical Specifications

CNC Bronze Alloys Family Data

Material Properties

Density
8.7-8.9 g/cm³
Melting Point
950-1050°C
Thermal Conductivity
50-60 W/m·K
Electrical Conductivity
10-15 MS/m
Coefficient of Expansion
16-18 µm/m·K

Machining Rules

Max Build Size
850 x 500 x 500 mm
Minimum Wall Thickness
1 mm
Minimum Assembly Gap
0.01 mm
Minimum End Mill Size
1 mm
Minimum Drill Size
0.5 mm
Tolerances
Typical tolerances are ±0.1 mm, depending on the specific requirements of the part.

Available Finishes

Finishes That Make Sense For Bronze Alloys

P

Polishing

Smooths and brightens bronze surfaces to improve appearance and reduce surface roughness.

N

Nickel Plating

Applies a protective nickel layer to improve corrosion resistance, wear resistance, and surface hardness.

P

Patina Finish

Creates a controlled aged or decorative surface color while helping protect the bronze surface.

B

Bead Blasting

Creates a consistent matte surface texture and helps hide minor machining lines on bronze parts.

Compare & Decide

Pick A Different CNC Family

Better Machinability

CNC Brass Alloys

CNC Brass Alloys are metal materials with copper (Cu) and zinc (Zn) as the main components, commonly used for CNC machining. Depending on the alloy composition, brass can provide good mechanical properties, corrosion resistance, and excellent electrical and thermal conductivity.

Electrical Conductivity

CNC Copper Alloys

CNC Copper Alloys are a class of high-performance metal materials with excellent electrical conductivity, thermal conductivity, corrosion resistance, and good machinability. With their excellent physical and chemical properties, they play a key role in modern industrial production and are an ideal choice for high-precision, durable, and reliable parts.

Next Step

Ready To Machine Bronze Alloys Parts?

Upload CAD and include a 2D drawing for tolerance-critical features, threads, finish requirements and inspection notes.

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