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Beryllium Copper Description
Beryllium bronze is a copper alloy with beryllium as the main alloying element. It not only has excellent elasticity, but also performs well in terms of strength, hardness, fatigue strength, etc. At the same time, it has the characteristics of corrosion resistance, wear resistance, cold resistance and high electrical conductivity. In addition, beryllium bronze also has unique advantages such as non-magnetism and no spark generation upon impact.
What is beryllium copper?
Beryllium bronze is a high-performance alloy formed by using copper as the base material and adding other elements. Its main components are copper, tin, and beryllium, among which copper accounts for the highest proportion, typically ranging from 85% to 90%.
The chemical composition of beryllium bronze is mainly a copper-based alloy containing 0.2% to 2.75% of beryllium. It has a wide range of applications. The addition of beryllium can significantly enhance the strength of copper while maintaining its excellent electrical and thermal conductivity.
Chemical composition
Main elements: Beryllium bronze is mainly composed of copper and beryllium, with the content of beryllium ranging from 0.2% to 2.75%. High-performance beryllium bronze: The content of beryllium in high-performance beryllium bronze is usually between 1.9% and 2.15%.
| Element | Copper | Tin | Beryllium | Nickel | Plumbum | Strontium | Phosphorus | Sulphur |
| Chemical symbol | Cu | Sn | Be | Ni | Pb | Sr | P | S |
| Percentage (%) | 85%-90% | 3%-7% | 0.2%-2.75% | 0.1%-1.5% | 0.1%-0.5% | 0.1%-0.5% | 0.01%-0.06% | ≤0.05% |
The performance characteristics of beryllium copper
After standard heat treatment, the beryllium copper material exhibits the following properties:
- Tensile strength: 240 MPa
- Elongation: ≥ 20% (measured at δ10)
- Hardness: Brinell hardness HB ≤ 50
- Fatigue strength: Maintains stable performance even under high-temperature conditions
- Electrical conductivity: 25-30% of the copper benchmark value
- Others
Beryllium Copper Grades
In different countries and regions, in order to meet their respective market demands and technical standards, unique brand names have been launched.
- China: QBe2, QBe1.7
- United States (ASTM): C17200, C17000
- United States (CDA): 172, 170
- Germany (DIN): QBe2, QBe1.7
- Germany (Digital System): 2.1247, 2.1245
- Japan: C1720, C170
Process of beryllium copper
- I. Ingredient Mixing
- II. Melting
- III. Casting
- IV. Extrusion
- V. Heat Treatment
- VI. Surface Treatment
- VII. Inspection
Beryllium Copper Classification
Beryllium bronze is divided into two types. According to the alloy composition, beryllium bronze with a beryllium content of 0.2% to 0.6% is called high conductivity (electrical and thermal) beryllium bronze; beryllium bronze with a beryllium content of 1.6% to 2.0% is called high strength beryllium bronze. According to the manufacturing process, it can be divided into casting beryllium bronze and wrought beryllium bronze.
The grades of beryllium bronze alloys used internationally start with the letter "C". The wrought beryllium bronze has two types: C17000 and C17200 (high-strength beryllium bronze) and C17500 (high-conductivity beryllium bronze). The corresponding cast beryllium bronze has C82000, C82200 (high-conductivity cast beryllium bronze), as well as C82400, C82500, C82600, and C82800 (high-strength wear-resistant cast beryllium bronze).
Applications of Beryllium Bronze
Beryllium bronze possesses high strength, toughness, electrical conductivity and corrosion resistance, and is widely used in the following fields:
- 1. Aerospace field: It is used to manufacture aircraft components, engine parts and accessories for spacecraft, etc.
- 2. Metallurgical field: It is used to manufacture forgings, molds and injection molds.
- 3. Electrical equipment field: It is used to manufacture high-precision complex conductive parts, wiring boards and connectors, etc.
- 4. Chemical field: It is used to manufacture chemical equipment, valves and pump bodies, etc.