High Strength Cube2/UNS.C17200 Berylliium Copper Alloys 0.2x25mm Soft Copper Strip for Electrical Switch
Product Normal Description:
Product Name: Beryllium copper alloys
Product Form: Copper Strip
Grade: Cube2/UNS.C17200
Product Specification: 0.2x25mm
State: Soft
Application: Electrical Switch
Product Brand: CUBERYLLIUM®
CUBERYLLIUM®-172 also named Cube2--C17200 (CDA 172) Beryllium Copper is the most commonly utilized Copper Beryllium alloy and is notable for its highest strength and hardness compared to commercial copper alloys. C17200 alloy contains appr. 2% of beryllium and achieves its ultimate tensile strength can exceed 1360Mpa, while the hardness approaches Rockwell C45. Meanwhile, the electrical conductivity is a minimum of 22% IACS in the fully aged condition.C17200 also exhibits exceptional resistance to stress relaxation at elevated temperatures.
CUBERYLLIUM® also manufactures the lower beryllium content alloys, including C17510 commonly known as Alloy 3, and C17500 or Alloy 10. These alloys have higher thermal and electrical conductivity, but lower hardness and strength when compared to C17200. Applications for the low-beryllium alloys include welding components, die-casting plunger tips, and blow-mold cores, cavities, and pinch-offs. Once again, these alloys are cast, forged, heat treated and machined entirely in-house.
Chemical Composition of CUBERYLLIUM ®-172 Beryllium Copper Alloys:
Product Grade: CUBERYLLIUM ®-172(UNS. C17200)
Beryllium(Be): 1.80-2.00%
Cobalt(Co) + Nickel(Ni): 0.20% Min
Cobalt(Co) + Nickel(Ni) + Iron(Fe): 0.60% Max
Lead: 0.02% Max
Copper(Cu): Balance
Note: Copper plus additions equal 99.5% Minimum.
Typical Physical Properties of CUBERYLLIUM ®-172(Beryllium Copper Strip C17200):
Density (g/cm3): 8.36
Density before age hardening (g/cm3): 8.25
Elastic Modulus (kg/mm2 (103)): 13.40
Thermal Expansion Coefficient (20 °C to 200 °C m/m/°C): 17 x 10-6
Thermal Conductivity (cal/(cm-s-°C)): 0.25
Melting Range (°C): 870-980
Temper Designations of CUBERYLLIUM ®-172: State Solution Annealed (TB00)
| CuBeryllium Designation | ASTM | Mechanical and Electrical Properties of Copper Beryllium Strip |
| Designation | Description | Tensile Strength
(Mpa) | Yield Strength 0.2% offset | Elongation Percent | HARDNESS
(HV) | HARDNESS
Rockwell
B or C Scale | Electrical Conductivity
(% IACS) |
| A | TB00 | Solution Annealed | 410～530 | 190～380 | 35~60 | <130 | 45~78HRB | 15～19 |
Key Technology of Beryllium Copper(Heat treatment)
Heat treatment is the most important process for this alloy system. While all copper alloys are hardenable by cold working, beryllium copper is unique in being hardenable by a simple low temperature thermal treatment. It involves two basic steps. The first is called solution annealing and the second, precipitation or age hardening.
Solution Annealing
For the typical alloy CuBe1.9 (1.8- 2%) the alloy is heated between 720°C and 860°C. At this point the contained beryllium is essentially “dissolved” in the copper matrix (alpha phase). By rapidly quenching to room temperature this solid solution structure is retained. The material at this stage is very soft and ductile and can be readily cold worked by drawing, forming rolling, or cold heading. The solution annealing operation is part of the process at the mill and is not typically used by the customer. Temperature, time at temperature, quench rate, grain size, and hardness are all very critical parameters and are tightly controlled by ohmalloy.
Age Hardening
Age hardening significantly enhances the material’s strength. This reaction is generally carried out at temperatures between 260°C and 540°C depending on alloy and desired characteristics. This cycle causes the dissolved beryllium to precipitate as a beryllium rich (gamma) phase in the matrix and at the grain boundaries. It is the formation of this precipitate which causes the large increase in material strength. The level of mechanical properties attained is determined by the temperature and time at temperature. It should be recognized that beryllium copper has no room temperature aging characteristics.
Size Available
Standard Tolerance
| Tolerance Sheet |
| (MM) |
Strip
Thickness | CuBeryllium®
Standard Tolerance |
| over | incl. | plus or minus |
| 0.03 | 0.08 | 0.003 |
| 0.08 | 0.1 | 0.004 |
| 0.1 | 0.15 | 0.005 |
| 0.15 | 0.2 | 0.006 |
| 0.2 | 0.25 | 0.007 |
| 0.25 | 0.4 | 0.008 |
| 0.4 | 0.55 | 0.009 |
| 0.55 | 0.7 | 0.01 |
| 0.7 | 0.9 | 0.015 |
| 0.9 | 1.5 | 0.025 |
| Note: Tolerances apply to rolled and mill hardened strip. |
Product Photos:
Application of CUBERYLLIUM ®-172:
CUBERYLLIUM ®-172 usually used for electrical industry, fasteners and industrial.
Electrical Industry: electrical switch and relay blades(switch parts, relay parts), clips, fuse clips, connectors, spring connectors, navigational indstruments, contact bridges, belleville washers;
Fasteners: washers, lock washers, fasteners, retaining rings, roll pins, screws, bolts;
Industrial: pump parts, springs, electrochemical, spline shafts, non sparking safety tools, flexible metal hose, housings for indtruments, bearings, bushings, valve seats, valve stems, disphragms, springs, welding equipment, rolling mill parts, valves, bourdon tubes, wear plates on heavy equipment, bellows.
FAQ:
Q1:Could you produce Beryllium Copper strip by Mill Hardened process.
A1:Yes, we could produce AM(TM00), 1/2HM(TM01).HM(TM04) XHM(TM06) XHMS(TM08).,we are the only factory could do harden strip in China.
Q2: What’s the advantages the Beryllium Copper of CUBERYLLIUM®.
A2: 1: The Biggest Coil weight could be reach 1200kg/Coil
2:We are the only one who melting by Vacuum semi-Continuous Furnace.
3:Surface further polishing for top clients.
Q3: Why you melting by Vacuum semi-Continuous Furnace.
A3:Could be get the Cast ingot without gas,smaller segregation, Grain Refinement
Q4: What's the payment terms?
A4: We accept T/T, L/C, Paypal etc. It can be negotiated when the amount is different.
Product Tags:
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UNS C17200 Beryllium Copper Heat Treatment Strip Cube2 Material Soft 0.2x25mm Images
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