Alloy 25, also known as copper beryllium, is a metal alloy containing approximately 2% beryllium that achieves the highest mechanical strength and hardness after heat treatment. It has excellent bending behavior in soft conditions and distinguishes itself with high fatigue strength, relaxation resistance at elevated temperatures, and a unique combination of high electrical and thermal conductivity. Alloy 25 finds applications in areas requiring these properties, such as plastic molds, electrical contacts, and aerospace components.

1. Ber yllium c opper, als o k nown as c opper ber yllium , BeCu or ber yllium
bronze, is a m etal alloy of c opper and 0.5 to 3% ber yllium , and s om etim es
with other allo ying elem ents . There are a f ew alloys of Ber yllium Copper but
the m os t c omm only us ed is “ALLO Y 2 5” whic h available with us in r eady
s toc k .
ALLOY 25
Alloy 25 is als o k nown as “CuBe2, C17200 , BeCu, CDA 172, CB101, ISO
CuBe2, CEN CW 101C, A4/2, bery llium bronze ” .
This alloy whic h c ontains approx im atively 2 % of ber yllium and ac hieves the
highes t m ec hanic al s trength and hardness af ter heat tr eatm ent of all c opper
ber yllium alloys . In s of t or s lightly re -rolled c ondition, it ex hibits exc ellent
bending behav iour . It dis tinguis hes its elf by high f atigue s trength,
outs tanding relaxation res is tanc e at elevated tem peratures and a unique
c om bination of high s trength and exc ellent elec tr ic al c onduc tivity.
PHYSIC AL PROPERTIES
Elas tic m odulus - 19,000 k s i /131 GPa
Melting point (s olidus ) - ~1600 ° F/~870 ° C
Dens ity - .302 lb/in3/8.36 g/cm 3
Therm al expans ion - 9.7x 10-6 in/in °F /17.5x 10-5 °C-1
Therm al c onduc tivity (100°C) - 90 BTU/hr•f t•°F /155 W /m •K
Heat c apac ity - 0.10 BTU/lb•°F /0.44 J /g•K
PROPERTIES
High Conduc tiv ity
Elevated Tem perature Str ength
Ref lec tivity
Dim ens ional Stability
Highly Mac hinable
High Tens ile Upto 300 Ks i.
Non Spark ling
Non Magnetic
Galling / W ater Res is tanc e
Strength And Toughnes s In Cr yogenic C onditions
Com bination Of High Elec tr ic al And Ther m al Conduc tiv ity,
High Strength And Hardnes s
Non- Magnetic
Good Corros ion Res is tanc e And Fatigue Res is tanc e
High Melting Point
Exc ellent Metalwork ing, Form ing And Mac hining Qualities
Duc tile, W eldable, And Mac hinable A lloy
DALI ELECTRONICS · VIJAY COMMERCIAL HOUSE
8/a, Haroon Building, 190 Sham aldas Gandhi M arg , M u m b a i 4 0 0 0 0 2 , M h , I n d i a .
Mo b i l e: + 9 1- 98 2 02 9 93 60 / 98 2 12 3 62 7 5 · P h: + 9 1 - 22- 2 20 1 7 12 8, 22 03 8 20 4
F a x: + 91 - 2 2- 22 0 16 6 29 · E - m a i l: b er yl c o @ g ma i l . co m , be r yl l i um @ v s n l. ne t
Website: www.BerylliumIndia.com

2. Res is tant To Non-O xidizing Ac ids (Eg: H ydroc hloric Ac id, Carbonic
Ac id)
Fas t Heating
Fas t Cooling
Anti Galling
Nozzles f or Injec tion Mac hine
APP LIC ATIONS
Plas tic Moulds : Due to the unique c om bination of therm al c onduc tivity
and s tr ength av ailable in thes e c opper m old alloys , you gain
advantages lik e:
o Shorter c yc le tim e
o Im proved plas tic par t dim ens ional c ontrol
o Better par ting line m ain tenanc e
o Exc ellent c orros ion res is tanc e
o f or injec tion m old c ores and c avities where m oderate hardness
and high toughnes s and c onduc tiv ity are required
Plas tic Injec tion and Moulding Ins er ts
Metal Die Cas ting
Plunger Tips
Spot W elding & Res is tant W elding Elec tr odes
Lightweight Struc tural Com ponents In The Def ens e And Aeros pace
Indus tries In High- Speed Airc raf t, Miss iles , Spac e Vehic les And
Comm unic ation Satellites .
Springs & Spr ing W ires
Load Cells
Non-Spark ing Tools in explos ive potential environm ents
Elec tric al Contac ts In S witc hes & Connec tors
Struc tural Suppor t For Printed Circ uit Boards
Mic rowave
Tools For Hazardous Envir onm ents ,
Mus ic al Ins trum ents , Prec is ion Meas urem ent Devic es , Bullets , And
Aeros pac e
Low-Current Contac ts For Batter ies
Relays
Bearings f or Low W ear & Tear
W atc h Parts Suc h As W heels , W atc h Hands , Balanc es , Lever s , etc
W eighing Sc ale Balanc es
Elec tro Magnetic (Em i) Shielding
Golf Clubs On W edges And Putters
Elec tric al Engineering
Autom otive Connec tions
Aeros pac e S ys tem s
Core Pins
Press ure Hous ing For Prec is ion Magnetom eters And Ins trum ents
Retrac table Antennas
Telec om m unic ation Cables
Miniature Mac hine E lec tronic Soc k ets
DALI ELECTRONICS · VIJAY COMMERCIAL HOUSE
8/a, Haroon Building, 190 Sham aldas Gandhi M arg , M u m b a i 4 0 0 0 0 2 , M h , I n d i a .
Mo b i l e: + 9 1- 98 2 02 9 93 60 / 98 2 12 3 62 7 5 · P h: + 9 1 - 22- 2 20 1 7 12 8, 22 03 8 20 4
F a x: + 91 - 2 2- 22 0 16 6 29 · E - m a i l: b er yl c o @ g ma i l . co m , be r yl l i um @ v s n l. ne t
Website: www.BerylliumIndia.com

3. CHEM IC AL COM POSITION
Ber yllium Be 1.80 ~ 2.00 %
Cobalt + N ic k el Co + N i 0.2 % m inim um
Cobalt + N ic k el + Ir on Co + N i + Fe 0.6 % m inim um
Lead Fe 0.02 % m axim um
Other 0.50 %
Copper Cu Balanc e
DALI ELECTRONICS · VIJAY COMMERCIAL HOUSE
8/a, Haroon Building, 190 Sham aldas Gandhi M arg , M u m b a i 4 0 0 0 0 2 , M h , I n d i a .
Mo b i l e: + 9 1- 98 2 02 9 93 60 / 98 2 12 3 62 7 5 · P h: + 9 1 - 22- 2 20 1 7 12 8, 22 03 8 20 4
F a x: + 91 - 2 2- 22 0 16 6 29 · E - m a i l: b er yl c o @ g ma i l . co m , be r yl l i um @ v s n l. ne t
Website: www.BerylliumIndia.com

4. Mechanical and Electrical Properties for Beryllium Copper Strips & Foils
DALI ELECTRONICS · VIJAY COMMERCIAL HOUSE
8/a, Haroon Building, 190 Sham aldas Gandhi M arg , M u m b a i 4 0 0 0 0 2 , M h , I n d i a .
Mo b i l e: + 9 1- 98 2 02 9 93 60 / 98 2 12 3 62 7 5 · P h: + 9 1 - 22- 2 20 1 7 12 8, 22 03 8 20 4
F a x: + 91 - 2 2- 22 0 16 6 29 · E - m a i l: b er yl c o @ g ma i l . co m , be r yl l i um @ v s n l. ne t
Website: www.BerylliumIndia.com

5. PRODUCT S TOCK RAN GE
FOILS
0.005 to 0.045 mm c an be produc ed agains t your requir em ents . Som e
thic k ness es are av ailable in ready s toc k .
SHEETS or S TRIPS IN COILS
T hi c k n es s ( m m ) W i dt h ( m m ) L e n gt h ( m m ) S t oc k P os i t i o n
0.05 to 0.90 mm 4 to 300 mm Coil Ready S toc k
1.0 to 10.00 200 m m 1000 mm Ready S toc k
RODS or ROUNDS
Dia (mm) L e n gt h ( m m ) S t oc k P os i t i o n
1 to 50 1 m eter or m ore Ready S toc k
50 to 600 As Required Ready S toc k
W IRES or ROUND W IRES
Dia (mm) L e n gt h & P ac k i n g S t oc k P os i t i o n
0.10 to 2.00 Spools & Coils Ready S toc k
BLOCKS or SL ABS
From Ready S toc k , we of f er Cut -To-Size piec es as per your dim ens ions and
requirem ents .
M INIMUM ORDER QU AN TITY (M OQ)
W e have no MOQ f or the s toc k available with us . W e reques t MOQ only
when we it is not a regular s ize , grade, etc . Your Order is never too sm all
f or us .
B E R Y L L I U M M AS T E R I N G O T S
W e ca n of f er v ar io u s U LT R A P U R E V A C U U M S ME LT E D b er yl l i u m a l l o ys a s
fo l l ow s :
B er yl l i u m C o p pe r : C u B e2 , C u B e 4, C u B e1 0
B er yl l i u m N i c k e l : N i B e 6, N i B e1 4
B er yl l i u m A l um i n iu m : A l Be 2 .5 , A l B e5
B er yl l i u m M ag n e s iu m: Mg B e 2, M g B e3 , M g Be 4
OTHER BERYLLIUM ALLOYS
W e ca n a l so o ff er pr o d u ct s o f o th er k i n d s of B er yl l i u m A l lo ys l i k e
C o b al t- C o p per - B er yl l i um A lu m i n iu m B er yl l i u m
B er yl l i u m N i c k e l B er yl l i u m M ag n e s iu m
ma n y m or e …
OTHER METAL & ALLOYS
Titanium MuMetal Kovar
Nickel Invar Incoly
Resistance Welding Alloys: CuCrZr, CrZr, CuCoBe, etc.
DALI ELECTRONICS · VIJAY COMMERCIAL HOUSE
8/a, Haroon Building, 190 Sham aldas Gandhi M arg , M u m b a i 4 0 0 0 0 2 , M h , I n d i a .
Mo b i l e: + 9 1- 98 2 02 9 93 60 / 98 2 12 3 62 7 5 · P h: + 9 1 - 22- 2 20 1 7 12 8, 22 03 8 20 4
F a x: + 91 - 2 2- 22 0 16 6 29 · E - m a i l: b er yl c o @ g ma i l . co m , be r yl l i um @ v s n l. ne t
Website: www.BerylliumIndia.com