Beryllium Copper Alloy Plate

Beryllium copper is copper alloy with the main alloying elements of beryllium, also known as bronze beryllium. It is a senior elastic material with the best performance among copper alloys. It have a series of excellent physical, chemical and mechanical properties with high strength, elasticity, hardness, fatigue strength, elastic hysteresis, corrosion resistance, abrasion resistance, cold resistance, high-conductive, non-magnetic, no sparking when shocked. After quenched tempering, it have properties of high strength, flexibility, abrasion resistance, fatigue resistance and heat resistance. Meanwhile Beryllium Copper also have properties of high electrical conductivity, thermal conductivity, easy welding and brazing. In the atmosphere, freshwater and seawater, the corrosion resistance is excellent. Beryllium copper alloy corrosion in seawater velocity: (1.1-1.4) × 10-2mm / years. Corrosion Depth: (10.9-13.8) × 10-3mm / years. After corrosion, there is no change of the strength and elongation, so it can be maintained in the sea for more than 40 years, is a irreplaceable material for cable repeater structure in bottom of sea. When in sulfuric acid medium: in less than 80% concentration of sulfuric acid (at room temperature) the corrosion depth is 0.0012-0.1175mm， when in concentration of greater than 80%, the corrosion is slightly accelerated.


---Size: length / width <800mm, thickness <300mm, single finished piece weight <200 kg;
---Chemical Composition: Be: 1.8-2.0%, Pb: 0.2-0.6%, Co+Ni>=0.2%, Co+Ni+Fe<=0.6%, Other impurities<=0.1%, Cu:Base
---Temper: A(TB00), H(TD04), AT(TF00), HT(TH04)
---Parameters:
Thermal conductivity ≥ 105w/m.k20 ℃
Tensile strength (Mpa): 1105
Specific gravity (g/cm3): 8.3
Yield strength (0.2%) Mpa: 1035
Softening Temperature (℃): 930
Elongation (%): 1
Elastic Modulus (Gpa): 128
Before quenching hardness 200-250HV
After quenching hardness ≥ 36-42HRC
Softening temperature 930 ℃
Thermal conductivity (W/m.k20 ℃): 105
Conductivity (IACS%): 18
International Specification:
Strips: ASTM B194, AMS 4530, 4532; SAE J461,463
Plates: ASTM B194, SAE J461,463; AMS 4530, 4533, 4534,AMS 4650, 4651; RWMA Class 4.
European Standards: CuBe2, DIN 2.1247, CW101C to EN
Note:
ASTM: American Society for Testing and Materials
SAE: Society of Automotive Engineers
AMS: Aerospace Materials Specification (Published by SAE)
RWMA: Resistance Welder Manufacturers' Association
Note: Unless otherwise specified, material will be produced to ASTM.


Plates and other similar products are mainly used in plastic injection molding industry, facing all kinds of plastic mold manufacturer.


Advantage:
(1) Long life of beryllium copper mold
For manufacturers, the expected life of the mold is very important. On the gound of meeting the requirements of strength and hardness, beryllium copper’s resistance to thermal stress is much stronger than steel mold, the insensitivity to mold temperature’s stress can greatly improve the life of the mold, which both to ensure the continuity of production, and to reduce the cost. From this point, the long life of beryllium copper is compelling.
(2) Good thermal conductivity properties of beryllium copper
Beryllium copper's high thermal properties can help to control the plastics processing mold’s temperature, easier to control the molding cycle, and can ensure the temperature uniformity of the mold wall. Compared with the steel, beryllium copper’s molding cycle is much shorter, the average temperature of the mold can be reduced about 20%. When the difference between the average temperature of the mold and the average off touch the wall’s temperature is small (for example, mold parts can not easily be cooled in the case) , use the beryllium copper mold material, the cooling time can be reduced by 40% and the mold wall temperature is only reduced by 15%. These features will bring several benefits to the mold manufacturers using this material: shorting the molding cycle time, increasing the productivity; Good temperature uniformity for mold wall, improving product quality; Reducing the usage of cooling ducts, simplifying the mold structure; Increasing the material’s temperature, thereby reducing the wall’s thickness of small products, reducing product costs.
(3) Excellent surface quality of beryllium copper
Beryllium copper is very suitable for surface finishing, plating can be directly processed, and as the adhesion performance is very good, polishing can be very easy. This enables the surface of the product surface to be more smooth, detailed, consistent to the requirements of aesthetics and precision.
(4) High rate of heat penetration for beryllium copper
In addition to thermal conductivity, the thermal transmittance of the mold material also do a very important impact on the plastic products. The use of beryllium copper mold, can eliminate the signs of overheating. If the heat penetration is low, the distal end region of the mold wall contact temperature will be higher, so that the mold temperature difference will be large, and in some extreme cases, it may cause changes in the temperature region, extending from the end of the plastic to the other end , so the sink marks might appear in the overheated region.

The advantages of our products:
(1) Price advantage. We are factory directly selling, bypassing a middleman, the profits will be returned to the second class distributors and end customers, to ensure most competitive price.
(2) Quality advantage. Company producing management personnels have many years of experience in producing and researching the beryllium copper. They are trained by the company on the own, have a high degree of understanding and production experience. Along with the improved process control, inspection procedures, it thus ensured that the product quality is much better than domestic counterparts. The rejection rate can be controlled within 1%.
(3) Fast delivery. Efficient production management and convenient transportation ensured the fast shipping speed.