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Beryllium Copper Bar
Beryllium copper (BeCu), also known as beryllium bronze or spring copper, is one of the highest strength copper-based alloys available today. Through precipitation hardening (age hardening), it achieves tensile strength exceeding 1350 N/mm² — comparable to steel while retaining many of copper's desirable properties. The alloy combines high strength, high conductivity (both electrical and thermal), non-magnetic characteristics, and non-sparking properties, making it ideal for demanding applications across aerospace, electronics, oil & gas, and automotive industries
Diameter Range: 0.3-300mm or above
Weight per unit: Max. 150kgs
Standard: ASTM B 196, ASTM B 441, EN 12163, NFL 14709, AMS 4533, AMS4534, AMS4535, AMS4650, AMS4651
Description
Beryllium copper is a type of Wuxi bronze with beryllium as the main alloy component, belonging to copper alloy materials. Beryllium copper is a typical age precipitation strengthening alloy. Containing 1.7-2.5% beryllium and small amounts of nickel, chromium, titanium and other elements, after quenching and aging treatment, the strength limit can reach 1250-1500MPa, which is close to the level of medium strength steel.
In the quenched state, it has good plasticity and can be processed into various semi-finished products. Beryllium copper has high hardness, elastic limit, fatigue limit, and wear resistance, as well as good corrosion resistance, thermal conductivity, and electrical conductivity. It does not produce sparks when impacted and is widely used as an important elastic component, wear-resistant part, and explosion-proof tool. Common grades include QBe2.0, QBe2.5, QBe1.7, QBe1.9, etc.(China Grade)
Chemical Composition
|
Numbering |
Be |
Co+Ni |
Cu |
Fe |
Pb |
Si |
Al |
|
C17200 |
1.8-2.0 |
Co+Ni≥0.2 |
Margin |
0.15 |
- |
0.15 |
0.15 |
|
C17300 |
1.8-2.0 |
Co+Ni≥0.2 |
Margin |
0.15 |
0.2-0.6 |
0.15 |
0.15 |
|
C17500 |
0.4-0.7 |
Co 2.4-2.7 |
Margin |
0.15 |
- |
0.15 |
0.15 |
|
C17510 |
0.2-0.6 |
Co≤0.3,Ni 1.4-2.2 |
Margin |
0.15 |
- |
0.15 |
0.15 |
|
QBe2.0 |
1.8-2.1 |
Ni 0.2-0.5 |
Margin |
0.15 |
0.005 |
0.15 |
0.15 |
|
BeCo1Ni1 |
0.4-0.7 |
Co 0.8-1.3,Ni 0.8-1.3 |
Margin |
0.02 |
- |
0.02 |
0.04 |
Core of Manufacturing: Precipitation Hardening Heat Treatment
The magical properties of beryllium copper are not innate, but are awakened through exquisite heat treatment processes. This process mainly consists of two steps:
Solution treatment: Heat the alloy to a high temperature (about 780 ° C) to fully dissolve beryllium atoms into the copper lattice, forming a single supersaturated solid solution, and then rapidly cool (quench) to "freeze" this state. At this point, the material is in a softened state, with low hardness and good plasticity, making it easy to process.
Time treatment: Keep the parts that have undergone solid solution and cold processing at a lower temperature (about 300-350 ° C) for several hours. During this period, supersaturated beryllium atoms will precipitate in the form of extremely small, dispersed compounds (such as CuBe), which effectively hinder the movement of lattice dislocations, greatly improving the strength and hardness of the material, while having a relatively small impact on its conductivity.
Mechanical Properties by Temper – C17200 Round Bar
| Temper | Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|---|
| A (TB00) | Solution Annealed | 410 – 590 | 135 – 205 | 35 – 60 | HRB 45 – 85 |
| H (TD04) | Cold Worked | 590 – 900 | 520 – 725 | 10 – 20 | HRB 88 – 103 |
| AT (TF00) | Age Hardened | 1100 – 1375 | 930 – 1205 | 2 – 8 | HRC 34 – 42 |
| HT (TH04) | Cold Worked + Aged | 1205 – 1470 | 1030 – 1375 | 2 – 5 | HRC 37 – 45 |
Available Forms & Sizes
| Form | Size Range | Notes |
|---|---|---|
| Round Bars | Ø1 mm – Ø300 mm | Drawn (<35mm) or forged/extruded (>35mm) |
| Hexagonal Bars | Custom sizes | Available upon request |
| Square Bars | Custom sizes | Available upon request |
| Profiled Bars | Custom shapes | Per customer specifications |
| Plates/Sheets | Thickness 0.05 – 300 mm | Up to 600 mm width |
| Wire | Ø0.05 – Ø1.0 mm | Coil or spool |
Equivalent Designations
| Standard | High Strength | High Conductivity |
|---|---|---|
| UNS | C17200, C17300, C17000 | C17500, C17510 |
| Common Name | 25 Alloy, CuBe2, BeCu 172 | 11 Alloy, 8 Alloy, 7 Alloy |
| NGK | 25 (ULTRA/SUPRA) | 11 (PLUS), 8, 7 |
| Other | Beryllium Bronze | Copper-Beryllium |
Features
- Extremely high strength and hardness
After solid solution and aging treatment, its tensile strength can reach up to 1400MPa or more, and its hardness can reach HRC40 or more, which is comparable to many high-strength steels. This enables it to withstand extremely high stress and repeated impacts.
- Excellent conductivity and thermal conductivity
Despite achieving such high strength, its conductivity can still be maintained between 20% and 60% IACS (International Annealed Copper Standard), which is much higher than other high-strength copper alloys such as phosphor bronze and brass. This characteristic is crucial for applications that require both carrying high currents and maintaining structural integrity.
- Extraordinary fatigue resistance and elasticity
Beryllium copper has extremely high fatigue limit and minimal elastic hysteresis, which means it can maintain its shape under millions of cyclic loads without permanent deformation or fracture. This is its core capital as an advanced elastic material.
- Good wear resistance and corrosion resistance
It has high surface hardness and excellent wear resistance. Meanwhile, it inherits the excellent corrosion resistance of copper based alloys to atmospheric, seawater, and various chemical media, especially exhibiting stability in stress corrosion environments.
- Non magnetic and non sparking
Beryllium copper is a non-magnetic material that does not produce sparks during impact or friction. This characteristic makes it an ideal choice for tools and equipment in flammable and explosive environments such as petroleum, chemical, and coal mines.
Test Equipment
Applications
Beryllium copper plays an irreplaceable role in many high-tech and industrial fields:
- Electronic and electrical industry
Connectors and terminals: This is the largest application market for beryllium copper. Used for manufacturing high-speed and high reliability connectors in mobile phones, computers, and cars, ensuring stable signal transmission and good plug and unplug life.
- Relays and switches: As key elastic contacts, high elasticity, high conductivity, and resistance to arc erosion are required.
- Resistance welding electrode: Utilizing its high conductivity (rapid heat dissipation), high strength (resistance to deformation), and high temperature resistance, it is used for automotive body welding, etc.
Why choose us?
● Quality assurance: We always adhere to the quality of survival, reputation and development, to provide customers with high quality beryllium copper products.
● Price advantage: We have a sound production system and supply chain, can effectively control costs, to provide customers with competitive prices.
● Fast delivery: We have sufficient inventory and efficient production capacity to respond quickly to customer needs and ensure timely delivery.
FAQ
Q1: What are the main components of Beryllium Copper?
A: Beryllium copper, as the name suggests, is a copper alloy with copper as the matrix and beryllium as the main alloying element. Its typical beryllium content is between 0.5% and 3%, and small amounts of cobalt, nickel, or other elements may be added to optimize performance. Although the content of beryllium is not high, it plays a crucial role in the performance of the alloy
Q2: Does the electrical conductivity ofBeryllium Copper decrease due to processing?
A: Beryllium Copper is a high-performance copper alloy material, featuring excellent electrical conductivity, thermal conductivity, and machinability, and is widely used in electronics, machinery, energy, and other fields.
Q3: What surface treatments is Beryllium Copper suitable for?
A: Support silver plating, nickel plating, passivation and other processing, it is recommended to degreasing and pickling before pretreatment to improve adhesion.
Q4: How to distinguish Beryllium Copper from copper chromium zirconium?
A: Beryllium Copper has better cutting ability, while chromium zirconium copper (CuCrZr) focuses on high-strength wear resistance scenarios.
Q5: What is the corrosion resistance of Beryllium Copper?
A: Corrosion resistance in conventional industrial environment is better than pure copper, but strong acid and alkali environment is recommended to use with surface coating.
Q6: What parameters are required when ordering Beryllium Copper?
A: It is necessary to specify the alloy grade (such as C17200), state (hard/semi-hard), dimensional tolerance and testing standard (ASTM/GB).
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