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Beryllium Copper

 Although Be Cu Manufacturing produces parts and assemblies from numerous metals, plastics and other materials, we are most noted for our expertise with beryllium-copper. No one has more specialized production know-how than the company named for this unique alloy!


Beryllium Copper is a highly ductile material which can be stamped and formed into very complex shapes with the closest tolerances.

This malleability provides outstanding precision for critical miniature parts. However, unlike pure copper, beryllium-copper can be heat treated to harden the alloy into an extremely strong and durable metal. Stamped and formed shapes, such as springs, retain their performance characteristics for long spans of time.
Beryllium Copper

The inclusion of up to 2% of beryllium to copper enables the alloy to retain high electrical conductivity. Equally important, heat-treated beryllium-copper features excellent dimensional stability, fatigue resistance and corrosion resistance. Its strength is greater  than ordinary copper alloys and many steels.

Although beryllium-copper is more costly than some metals, the manufacturing process is usually more economical. Die life can be longer and downtimes for sharpening are usually far shorter.

The very significant metalworking advantages, combined with beryllium-copper's superior operating performance qualities, make it the obvious choice for the most demanding applications.

 

Properties Of Commonly Used Spring Materials
Material
Ultimate
Tensile Strength 
1000's psi
E-Modulus
psi
Rockwell
Hardness
% I.A.C.S.
Electrical
Conductivity
Endurance Strength
1000's psi       Cycles
                            H
       Berylco 25 
                            HT
100 - 120
190 (min.)
17 x 106
19 x 106
B96 - 102
C40 min.
15 - 17
22 - 25
35 - 40       106
40 - 48      106
                            H
       Berylco 25 
                            HT
70 - 85
110 (min.)
16 x 106
18 x 106
B70 - 80
B95 min.
20 - 24
48 min.
30              106
35              106
       Flat Spring
       Steel
160 - 320
30 x 106
Annealed
B70 - 85
Tempered
C38 - 50
--
--
       18 - 8 Stainless 
       Type 302
100 x 180
28 x 106
B92 - 109
--
35              106
       70 -30 Brass
       (Spring Temper)
94
16 x 106
B91
28
23              106
       Nickel Silver
       (Spring Temper)
108 - 120
18 x 106
B97 - 100
5
20              106
       Phosphor-Bronze
       (Spring Temper)
91 - 105
15 x 106
B90 - 100
18
30              106
                            H
       K-Monel 
                            HT
145 - 165
170 - 200
26 x 106
C25 - 32
C33 - 40
--
36.5 - 40    106
  --              --
                            H
       Ni-Span C 
                            HT
135
185 - 200
25.5 x 106
27 x 106
C28
C39 - 42
-- 
1.7
  35 - 40      106
45 - 60      106
Values listed above are approximations suitable for general engineering use.
See applicable A.S.T.M. references for specification purposes.
H - Cold Rolled                         HT - Heat Treated from Cold Rolled Condition