Beryllium Copper Strip

Features of Beryllium Copper

(9) Properties and Diameter Tolerance (Rod)

Properties of Rod

AlloyTemperDesignation 1)Diameter/ Width across flats (mm)Tensile test 2)Hardness test 3)Electrical conductivity (%IACS) 5)Heat treatment
Tensile strength (N/mm2)Elongation (%)Vickers 4)
HV
Rockwell
HRBHRC
25 Before age hardening
O C1720B-O from 1 up to 6 410 - 590 - 90 - 190 - - min. 17 -
over 6 up to 35 410 - 590 - 90 - 190 45 - 85 - min. 17 -
H C1720B-H from 1 up to 6 645 - 900 - 180 - 300 - - min. 15 -
over 6 up to 35 590 - 900 - 175 - 330 88 - 103 - min. 15 -
After age hardening
OT C1720B-OT from 1 up to 6 1100 - 1380 - 300 - 400 - - min. 22 315°Cx3h
over 6 up to 35 1100 - 1380 - 300 - 400 - 34 - 40 min. 22 315°Cx3h
HT C1720B-HT from 1 up to 6 1270 - 1650 - 340 - 440 - - min. 22 315°Cx2h
over 6 up to 35 1210 - 1620 - 330 - 430 - 37 - 45 min. 22 315°Cx3h 6)
11 Before age hardening
H BeCuB11-H from 1 up to 6 490 - 635 - 130 - 190 - - min. 30 -
After age hardening
HT BeCuB11-HT from 1 up to 6 760 - 965 - 230 - 280 - - min. 50 450°Cx2h
  • 1) B in column "Designation" represents "bar" or "rod"
  • 2), 3) If hardness specification is designated, tensile test will not be applied.
  • 4), 5) Vickers hardness and electrical conductivity are for design guidance only.
  • 6) If the diameter or width across flats is not exceeding 19mm, the conditions shall be

Diameter Tolerance of Rod(mm)

Rod
Specified DiameterTolerance
OverUp to and including
from 1.0 2.5 ±0.02
2.5 3.5 ±0.02
3.5 5 ±0.02
5 10 ±0.03
10 20 ±0.08
20 35 ±0.10
35 40 ±0.12

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

Rod: Range of Standard Production

Rod:Range of Standard Production

Rod:Range of Standard Production

Diameter/Thickness max. 200 mm
Width max. 300 mm

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