Qbe2.0 Beryllium Copper alloy (Round Bar Wire Strip Plate) by Standard ГОСТ 1789-70
Product Description:
Name: Beryllium copper alloy
Grade: Qbe2.0
End products form: round rod, bar, wire, strip, plate
Specification: according customers' requirement
Surface: Bright/Polished
Standard: ГОСТ 1789-70, ГОСТ 15835-70, ГОСТ 15834 – 77
Delivery Time: Usually within 10-15 days
Payment Term: we could accept T/T, L/C, Western Union
CUBERYLLIUM® manufactures copper beryllium in several distinct compositions. These fall into two categories: alloys selected for high strength (Alloys 172,173,170) and alloys selected for high conductivity (Alloys 751,750,741). And Gost standard QBe2,QBe1.9Ti(БрБ2;БрБНТ1.9) for Russia Market. Also Supply Master alloy : CuBeryllium-200; CuBeryllium-275);CuBeryllium-350 and Cuberyllium-400 to global factory.
Introduction of CUBERYLLIUM ®-Qbe2:
CUBERYLLIUM ®-Qbe2 also named Cube2. QBe2.0 beryllium bronze contains a small amount of nickel, which is a high-performance copper alloy with good mechanical, physical and chemical comprehensive properties. After solid solution and time hardening treatment (quenching and tempering), it has high strength, hardness, elasticity and wear resistance, corrosion resistance, heat resistance, explosion resistance, yield and fatigue limit. At the same time, it also has high thermal conductivity, electrical conductivity and cold resistance, non-magnetic, no sparks when hit, easy to weld and braze, easy to process, excellent cooling effect, excellent corrosion resistance in air, fresh water and sea water.
Chemical Composition of Beryllium Copper Alloy Qbe2.0:
| CUBERYLLIUM® Brand | Gost- Number | Beryllium | Al | Ni | Fe | Cu | Si |
| Cuberyllium-Qbe2 | Qbe2 | 1.80-2.10 | 0.15 max | 0.2~0.5 | 0.15 max | Rest. | 0.15 max |
Typical Physical Properties of Beryllium Copper Alloy Qbe2.0:
| Density (g/cm3): | 8.36 |
| Density before age hardening (g/cm3): | 8.25 |
| Elastic Modulus (kg/mm2 (103)): | 13.4 |
| 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 |
Product Photo:
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 CuBe2 (1.85- 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 Cuberyllium.
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.
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Qbe2.0 Beryllium Copper Alloy Round Bar Wire Strip Plate Standard ГОСТ 1789-70 Images
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