Characteristics and
Mechanical Properties of
Beryllium-Copper 

 NGK Berylco

The combined properties of Be/Cu alloys often prove it to be the most economical for a given application.

Parts can be easily formed from BERYLCO alloys in the soft temper. Then, hardened at a low temperature to a high property level.

We can supply the following alloys in the form of strip, rod, bar, wire and tube.

Bullet   BERYLCO 25 (1.8 to 2.0 % Be) as well as the similar alloy for free machining : 33-25 (+ 0.2% to 0.30 Pb).
Bullet   BERYLCO 165 (1.6 to 1.8 % Be, also to BS 2870 CB 101).
Bullet   BERYLCO 10 (0.4 to 0.7 % Be and 2.4 to 2.7 % Co).
Bullet   BERYLCO 14 (0.4 to 0.7 % Be and 1.4 to 2.2 Ni %) and the special 14 S 780 for applications requiring high levels of formability and good electrical and thermal conductivity.

 

Mechanical Properties

 

 

Mechanical Properties of Berylco 25 Strip to BS2870 CB101

CONDITION AGE HARDENABLE NGK BERYLCO TENSILE STRENGTH Min N/mm2 ELONGATION Min % VICKERS HARDNESS HV Min Max
Min Max
W
W (¼H)
W (½H)
W (H)
A
¼H
½H
H		 415
490
590
695		 35
15
6
2		 85
140
190
225 		140
190
225
270
HARDENED BY CUSTOMER
W (P) 3hrs at 315/320°C
W (¼H) P 2hrs at 315/320°C
W (½H) P 2hrs at 315/320°C
W (H) P 2hrs at 315/320°C

AT
¼HT
½HT
HT
1050
1100
1160
1230
3
2
1
-
350
360
370
385
410
420
430
450
MILL HARDENED
WM
W (¼H)M
W (½H)M
W (H)M
W (EH)M
W (ESH)M

AM
¼HM
½HM
HM
XHM
XHMS
700
760
830
930
1040
1170
18
14
10
8
4
2

210
240
260
295
330
360
250
280
310
345
380
415

Mechanical Properties of Berylco 25 Rod/Bar

TENSILE STRENGTH
in N/mm²		 YIELD STRENGTH 0.2% OFFSET
in N/mm² 		ELONGATION IN 50mm
min in% 		VICKERS HARDNESS
AS SUPPLIED
A All diameters- TB
¼H All diameters- TD2
½H Dia. < 30mm -TD3
H Dia. < 20mm -TD4

420-580
500-700
580-820
800-980
140-240
350-600
520-720
700-920
35
15
10
2
90-150
140-200
175-240
220-280
AGE HARDENED
AT (3hrs at 315°C)
¼HT (2hrs at 315°C)
½HT (2hrs at 315°C)
HT (2hrs at 315°C)

1130-1340
1150-1400
1180-1450
1250-1550
960-1200
1000-1350
1050-1370
1200-1460
4
3
2
1
350-400
360-420
365-430
380-440

 

Further Details:

Designations Chemical Compositions, and Specifications
Beryllium Copper - Nature and Applications

NGK Berylco.U.K. LTD
Houston Park, Montford Street,
Manchester  M50 2RP, UK
Telephone:  +44 (0) 161 745 7162
Fax:  +44 (0) 161 745 7520

Email:  enquiries@ngkberylco.co.uk

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