Features of Beryllium Copper

(6) Properties and Tolerances of High Electrical Conductivity Material (Alloy 8 and Alloy 11)

Properties of Strip

Alloy	Temper	Designation 5)	Tensile test 1)			Hardness test 2)	Electrical conductivity 3) (%IACS)
			Tensile strength (N/mm2)	Yield strength 0.2%offset (N/mm2)	Elongation (%)	Vickers hardness HV
8	HT 6)		700 - 870 4)	min. 600	min. 5	210 - 260	min. 60
11	HT 6)		760 - 965 4)	min. 655	min. 5	230 - 280	min. 50

1) Values are applicable to thickness 0.1 mm and over.
2) Values are applicable to thickness 0.1 mm and over.
3) Electrical conductivity is for design guidance only.
4) The upper limits of tensile strength are for design guidance only.
5) P and R in column "Designation" represent "strip cut to length" and "strip in coils".
6) "HT" is equivalent to "HM" under JIS (Japanese Industrial Standards)

Tolerances

Thickness tolerance of Alloy 8(mm)

* Standard thickness is only available for Alloy 8.

Specified thickness	Tolerance
0.08	±0.006
0.10	±0.008
0.12	±0.008
0.15	±0.008
0.18	±0.009
0.20	±0.009
0.25	±0.010
0.30	±0.015

Thickness tolerance of Alloy 11(mm)

Specified thickness		Tolerance
Over	Up to and including
form 0.08	0.10	±0.006
0.10	0.15	±0.008
0.15	0.20	±0.009
0.20	0.25	±0.010
0.25	0.40	±0.015
0.40	0.55	±0.020
0.55	0.70	±0.025
0.70	0.90	±0.030
0.90	Up to 1.20	±0.040

note) When the tolerance is specified either plus or minus side only, the same range of tolerance shall be applied. In case of strip cut to length tolerance shall be determined individually.

Length tolerance(mm)

		Tolerance
From	Up to and including	max. 1000
0.08	2.0	+10
		-0

Width tolerance(mm)

		Tolerance
		Strip cut to length	Strip in coils
Over	Up to and including	max. 200	max. 100	Over 100 up toand including 200
from 0.08	0.55	+2 -0	±0.1	±0.2
0.55	2.0	+2 -0	±0.2	±0.3

Camber tolerance(mm)

Specified Width		Maximum value
Over	Up to and including	Over 1000 length
From 4	13	4
13	50	3
50	100	2
100	200	1