Optical wire (CuNiZn)

CuNiZn optical wires from bedra make an impression by a flawless surface finish which is required by all renowned optical manufacturers.

Fields of application

Rim, temple, bridge, hinge, closing block & pad arm

Physical properties

Density (kg/dm³) 8.7
Melting range (°C) 1060 - 1110
E-Modulus (kN/mm²) 135
Thermal conductivity (W/m*K) 33
Coefficient of thermal expansion (10-6/K) 17.7
Electrical conductivity (MS/m) 3.3

Standardization and composition

Standard designation CuNi18Zn20
DIN 17663
Material no. 2.0740
DIN EN 12166 CW409J
ASTM UNS C75900
Cu 62
Zn balance
Ni 18
Others max. 0,5

Other tech. Values

Annealing temp. (°C) 600 - 650
Hardness annealed (HV) 95
Hardness 80% reduced (HV) 250

Delivery program

Profiles Round wires / square profiles / flat wires / special profiles
Surface coatings Several electroplated coatings, upon request
Make-ups Spools / coils / rods / drums

Please contact me and my team

Robert Gagnon

Robert Gagnon

Sales Director ELAS North America
bedra USA

bedraEDM
bedraWELDING
bedraELAS
Alloys from A to Z
bedra Vietnam

Berkenhoff GmbH (headquarters)

  • Kinzenbach plant
  • Berkenhoffstrasse 14
  • 35452 Heuchelheim
  • Germany

Berkenhoff GmbH

  • Merkenbach plant
  • Rehmühle 1
  • 35745 Herborn
  • Germany

bedra Vietnam Alloy Material Co., Ltd

  • Lot CN-06, Hoa Phu Industrial Park,
    Mai Dinh Commune,
    Hiep Hoa District, Bac Giang Province,
    Vietnam
Do you have a question about our products?
Use our wire configurator!
Close

Search

Metal price

To overview

News

Americas
Europe
Asia

You are about to leave the bedra Americas website

Back Visit

Products