Alloy 25 - Copper Beryllium UNS172000

 

Alloy 25 / Copper Beryllium (UNS172000) is a high-strength copper beryllium alloy that can be age hardened to property combinations tailored for individual application requirements.

Alloy 25 / CuBe offers high material strength even in large cross sections and the best thermal and electrical conductivity capability available in a high-strength material.

We stock all common sizes of Alloy 25 Bar and Tube in HT and AT tempers.

Advantages

  • High fatigue strength
  • High strength
  • Anti-galling
  • Non-magnetic
  • Corrosion resistance
  • High hardness
  • Resiliency
  • Thermal and electrical conductivity
  • Excellent machinability

Alloy 25 / CuBe Specification/Condition

  • ASTM B196/B251/ B643 / Cond AT & HT / UNS172000

Applications

  • downhole directional tools
  • M/LWD pressure housings
  • drill bit bearings
  • subsea actuator stems
  • subsea xmas trees
  • assisted lift pumps

Technical data (AT/HT)

Temper Yield Strength  (KSI) Tensile Strength (KSI) Elongation (EL) Hardness (HRC)
AT 145-175 (up to 3″ dia.)
130 – 175 (over 3″ dia.)
165-200 4-10 (up to 3″ dia,)
3-10 (over 3″ dia.)
36
HT 155-195 (3/8″ to 1″ dia.)
145-190 (1″ to 3″ dia.)
180-220 (3/8″ to 1″ dia.)
175-190 (1″ to 3″ dia.)
2-9 (3/8″ to 1″ dia.)
4-9 (1″ to 3″ dia.)
36

Dimensions

  • Bar: 0.750″ – 3.00″OD
  • Tubes: Various configurations

Alloy 25 / CuBe Chemical composition (Wt %)

 

Beryllium 

(Be)

Nickel + Cobalt 

(Ni+Co)

Nickel + Cobalt + Iron 

(Ni+Co+Fe)

Cobalt 

(Co)

Nickel 

(Ni)

Iron 

(Fe)

Silicon
(Si)
1.80 – 2.00 0.200 – 0.350 0.600 Max 0.200 Min 0.100 Max 0.100 Max 0.150 Max

 

Aluminum
(Al)
Tin 

(Sn)

Zinc 

(Zn)

Chromium 

(Cr)

Lead 

(Pb)

Copper 

(Cu)

0.100 Max 0.050 Max 0.050 Max 0.010 Max 0.010 Max Balance

 

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