CuSn20 chemical composition
House composition for bell metal. The high tin content gives the hard, resonant structure bells need; it is too brittle for structural or bearing use. Church bells are the foundry's original craft.
- Designation
- CuSn20
- Also known as
- Bell metal, 80/20 bell bronze, Glockenbronze, Καμπανομπρούντζος
- Family
- Tin bronze, gunmetal & bell bronze
Chemical composition (mass %)
| Element | min | max |
|---|---|---|
| CuCopper | 79.0 | 81.0 |
| SnTin | 19.0 | 21.0 |
Basis of values: House composition (Tsitouras bell bronze).
We cast CuSn20
Tin bronze castings by sand casting, and by centrifugal casting for bushings, wear rings and sleeves, machined in the group's own CNC machine shop, with the chemistry of every heat verified by optical emission spectrometer and EN 10204 3.1 certificates. Church bells are the craft the foundry started with.
- Sand casting at our foundry in Mandra, Attica; centrifugal casting for bushings, sleeves and liners
- Heat treatment at the foundry (water, oil or air quench); CNC machining in our machine shop in Perama
- Spectrometer analysis of every heat, mechanical testing and NDT
- EN 10204 3.1 inspection certificates; ISO 9001 (both plants) and ISO 14001 (foundry) certified
Other grades in this family
For information only, without warranty: limits per the cited standard or, where stated, typical or house values; ≈ marks a comparable grade, not an equivalent. The current edition of the standard, the purchase order and the drawing govern.