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CuSn12

  • ENCC483K

CuSn12 is a tin bronze with about 12% tin, distinguished by high hardness and wear resistance. It offers higher strength than CuSn10 for reliable performance under heavy operating conditions, retaining good sliding and friction properties even under high load. Its corrosion-resistant structure gives long service life in humid, oily and general industrial environments, and its mechanical stability is an advantage where dimensional precision is required.

01Applications

  • Worm screws and gears resistant to seawater and wear
  • Bearings operating at low speed under heavy load

02Heat Treatment

Typical values

Hardening
Not hardenable by heat treatment; strength by temper (cold work)
Homogenising / softening
550–700 °C; air cool
Stress relieving
200–300 °C, 1–2 h
Delivery condition
Cast or drawn; hardness according to temper

Heat treatment cycle (schematic)

0200400600800Anneal625°1. Anneal — 625 °C2. Cool — 25 °CStress relieve250°3. Stress relieve — 250 °C4. Cool — 25 °CTime (schematic, not to scale)°C
Stages and temperatures are typical values; soaking times depend on section size.

Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.

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