Beryllium Copper

 


Beryllium Copper C17200

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Beryllium Copper C17200

Beryllium Copper C17200, or Copper Beryllium, is a Copper based age-hardening alloy with a small amount of Beryllium, 3% or less. Beryllium Copper is high strength, non-magnetic, and non-sparking, it is best used for metalworking, forming and machining.

UNS# C17200

Shapes

Diversified Metals Offers These Metal Shapes

Temper
Specifications
ASTM-B-196
Other (Noted Below)

Other Details / Size Requirement*
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Beryllium Copper C17200

Beryllium Copper C17200 (CuBe2) is one of the highest strength systems within the family of copper based alloys, approaching the properties of many of the highly alloyed nickel based and high strength stainless steels.

The strength comes from a mechanism known as age hardening or precipitation hardening. This process arises from the precipitation of a beryllium, containing phase from a super saturated solid solution of almost pure copper. This phase known as gamma prime typically comes out of solution at temperatures between 390-750ºF (200-400 ºc) and strengthens the copper rich alpha matrix.

Beryllium Copper has other important assets other than high strength, which include non-magnetic, non-sparking and excellent fatigue properties. In addition, it has very good bearing and anti-galling characteristics even under poor lubrication, as well as good conductivity and the ability to maintain mechanical properties at cryogenic temperatures.

This combination of unique qualities has enabled Beryllium Copper to be used in numerous critical applications across the whole spectrum of industry. This ranges from non-sparking safety tools, components in ultra low temperature cryogenic equipment, aerospace bushings and bearings and professional quality percussion instruments.

It is also widely used in the electronics industry, where the combination of high electrical, thermal conductivities and fatigue strength makes it ideal for contacts, springs and miniature electronic components.

Beryllium copper has good resistance to seawater corrosion, most organic solutions, non-oxidizing acids and dilute alkalis. It is also resistant to hydrogen embitterment and resists stress corrosion cracking in sulphide and chloride solutions.

Alloy C17200 also meets the requirement of NACE MRO175.

The alloy is not recommended in ammonia or mercury containing environments or strongly oxidizing acids.

In the solid form Beryllium Copper creates few health problems but strict precautions should be taken against the inhalation of dust.

Standards & Designations

International
Standards
Material
Designation
Tube &
Pipe Seamless
Sheet & Plate Strip Rod & Bar
Profiles
Wire
Forgings
Stampings
USA
ASTM
UNS C17200 ASTM B 643 ASTM B 194 ASTM B 194 ASTM B 196
ASTM B 194
ASTM B 197 ASTM B 570
ASM AMS 4535 AMS 4651 AMS 4725 AMS 4650
SAE CA172 J463
J461
Military MIl-C-21657
QQ-C-530
QQ-C-530
Europe
EN
CuBe2 EN 1652 EN 1652
EN 1654
EN 13148
EN 14436
EN 12167
EN 12163
EN 12165
EN 12166 EN 12165
EN 12420
Germany
DIN 17666
CuBe2
2.1247
DIN 17670-1
DIN 1777
DIN 17672-1
UK
British Standard
CuBe1.7
CB101
BS 2870 BS 2870 BS 2873
France
NF A
CuBe1.9 NF A 51-109 NF A 51-109 NF A 51-114 NF A 51-114
Japan
JIS
C1720 JIS H 3130 JIS H 3130 JIS H 3270
Russia
GOST 18175
BrBe
China
GB 5233
QBe2 GB 4431
International
ISO 1187
CuBe2

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Typical Mechanical Properties

Product Form Condition Size
Imperial Metric
UTS
N/mm²   Ksi
Hardness
Rockwell C
Elong
%
Rod & Bar TH04 <= 0..375 (<=10mm)
>0.375-1” (>10-25mm)
>1” (>25mm)
185-225   1280-1550
180-220   1240-1520
175-215   1210-1480
39-45
38-44
37-44
1-5
1-5
1-7

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Physical Properties

Physical Properties Imperial Units Metric Units
Density 0.298 lb/in³ 8.26g/cm³
Melting Range 1600-1800ºF 865-980ºc
Mean Liner Expansion 20-300ºc 0.0178 ºc x10-³
Mean Liner Expansion 68-572 ºF 0.0099 ºF x10-³
Specific Heat 0.100Btu/lb/ ºF @68ºF 420J/kg ºK @20 ºc
Magnetic Permeability <1.001 <1.001
Thermal Conductivity 68Btu /ft²/fth ºF @68ºF 118W/m. ºK
Electrical Resistivity 3.09µ_in 7.84μΩcm
Electrical Conductivity 17-28% IACS @68ºF 6.2-10.1 μΩ-cm
Modulus of Elasticity 10³ i
Tension 19ksi 131N/mm²
Rigidity 7.3ksi 50. N/mm²

While the data is believed to be accurate, Diversified Metals, Inc. makes no representation or warranty of any kind (expressed or implied) and assumes no responsibility with respect to the accuracy and values shown above; this information should only be used as a guide.

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Applications

Aerospace

  • Bearing Retainer Rings
  • Bearings and Bushings

Automotive

  • Valve Guides
  • Valve Seats

Oil and Gas

  • Gears and Drive Cams
  • Valve Stems
  • Non Sparking Tools
  • Down Hole Drilling Tools

Electrical

  • Springs
  • Connectors and Contacts
  • Relays
  • Resistance Welding Electrodes
  • Welding Wheels
  • Bourdon
  • Tubes and Flexible Bellows in Electrical Equipment

Marine

  • Valves and Valve Stems
  • Hardware
  • Pump Rods and Shafts
  • Fasteners

Mining

  • Non-Sparking Tools

Musical Instruments

  • Components for Percussion Instruments

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