CuSn12 Cast Tin Bronze
CuSn12 (12 % tin) cast bronze. For worm wheels and heavy-duty bushes subject to high loads and wear.

Grade and sizes
CuSn12
A cast tin bronze with about 11–13 % tin. The higher tin content gives greater hardness and wear resistance than CuSn10, together with good sliding properties. Used for worm wheels, heavily loaded bushes and bearings, slideways and spindle nuts running at high loads and low speeds.
Casting standard: EN 1982
- SOLID BAR
- Ø10–300 mm
- HOLLOW BAR (CAST, FOR BUSHES)
- OD 10–300 mm · ID on request
- FLAT AND SQUARE BAR
- On request
- LENGTH
- Up to 3 m
- CASTING PROCESS
- Sand casting and continuous casting
- ORDERING
- Cut to length, minimum 5 kg
For large-quantity orders, other cut sizes are possible.
Chemical composition, mechanical properties and material certificates are available on request.
CuSn12 cast tin bronze weight calculator
Calculate the weight from the size, or the length and number of pieces needed for a target weight. Your selections are added to the quote message automatically.
Size: Ø50 × 400 mm, quantity: 1 (theoretical ~6.83 kg)
For other bronze sizes, weight-per-metre tables and densities, see the Bronze weight calculator →
Applications
- Worm wheels
- Heavy-duty bushes and bearings
- Slideways for cranes and presses
- Hydraulic parts
Frequently asked questions
What is the difference between 10 % and 12 % tin bronze?
As the tin content increases, hardness and wear resistance rise and ductility falls. CuSn10 is preferred for general-purpose bushes and gears; CuSn12 for worm wheels and heavy-duty bushes subject to higher loads and wear.
What are the designations for CuSn12?
CuSn12: CuSn12-C, EN CC483K, DIN 2.1052, UNS C90800, BS PB2. Any of these designations can be used in your enquiry; we will match the correct material.
Why can the invoiced weight differ from the calculated weight?
The calculator gives the theoretical weight. The actual weight varies with dimensional tolerances and cutting allowance; we invoice on the actual weight as weighed.
What information should I send for a quote?
We only need the size (diameter × length), quantity and delivery location. If you fill in the calculator above, these details are added to the WhatsApp message automatically.
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