Beryllium Copper Strip

Features of Beryllium Copper

(10) Properties and Diameter Tolerance (Wire)

Properties of Wire

AlloyTemperDesignation 1)Diameter (mm)Tensile testElectrical conductivity 2) (%IACS)Heat treatment
Tensile strength (N/mm2)Elongation (%)
25 Before age hardening
O C1720W-O from 0.3 390 - 540 - - -
1/4H C1720W-1/4H from 0.1 620 - 805 - - -
3/4H C1720W-3/4H from 0.1 835 - 1070 - - -
After age hardening
OT C1720W-OT from 0.3 1100 - 1380 - min. 22 315°Cx3h
1/4HT C1720W-1/4HT from 0.1 1210 - 1450 - min. 22 315°Cx2h
3/4HT C1720W-3/4HT from 0.1 1300 - 1590 - min. 22 315°Cx1h

1) W in column "Designation" represents "Wire"
2) Electrical conductivity are for design guidance only.

Diameter Tolerance of Wire(mm)

Wire
Specified DiameterTolerance
OverUp to and including
from 0.1 0.25 ±0.005
0.25 0.3 ±0.008
0.3 0.5 ±0.010
0.5 1 ±0.015
1 2 ±0.020
2 3.5 ±0.025

note) When the tolerance is specified either plus or minus side only, the same range of tolerance shall be applied.

Wire:Range of Standard Production

Wire:Range of Standard Production

Wire:Range of Standard Production

Diameterin coil 0.2 - 1.0 mm
on bobbin 0.05 - 0.15 mm

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