ASTM B196 Beryllium Copper Alloy Round Rod

Description of ASTM B196 Beryllium Copper Alloy Round Rod

ASTM B196 beryllium copper alloy round bar is a precipitation-strengthened material with a copper matrix and approximately 1.8–2.0% beryllium content. It corresponds to UNS number C17200 and is commonly referred to commercially as Alloy 25. This material is melted, hot-worked, and finally heat-treated according to ASTM B196/B196M-2018. Delivery conditions include solution annealed (A), solution-finished and cold-worked (1/2H, H), and solution-aged hardened (AT). Sizes typically range from 3–300 mm in diameter, with lengths up to 4 m available, and can be cut to length upon request.

The chemical composition is strictly controlled within the specification: Be 1.8–2.0%, Ni+Co ≥ 0.2%, Ni+Co+Fe ≤ 0.6%, Al ≤ 0.2%, Si ≤ 0.2%, with the balance being high-purity copper. All batches are accompanied by an EN 10204/3.1 material certificate, including the vacuum melting furnace number, heat treatment curve, and mechanical and electrical test data. The microstructure after aging is composed of a supersaturated α phase and uniformly dispersed γ′ precipitates, with a grain size controlled within 10 μm. The surface is centerlessly ground to a roughness of Ra ≤ 0.4 μm, a straightness of 0.5 mm/m, and a roundness tolerance within ±0.025 mm of the nominal diameter.

This round bar can be formed using conventional machining (turning, milling, drilling, grinding, CNC), as well as EDM and laser cutting. It is also suitable for inert gas welding, resistance welding, and brazing. It can also be plated (Au, Ag, Ni, Sn), PVD, and passivated. To avoid the risk of stress corrosion, a low-temperature stress relief annealing at 315°C for 2 hours is recommended for all machined parts before final finishing.

Features of ASTM B196 Beryllium Copper Alloy Round Rod

Strength and Elasticity: Peak-aged C17200 (Alloy 25) rounds bars demonstrate an ultimate tensile strength of 1,200–1,400 MPa, yielding more than 1,000 MPa of yield strength and possessing an elastic modulus of 128 GPa, which is comparable to many alloy steels. Its density is only 8.36 g/cm³.

Hardness and Wear Resistance: Peak hardness of this alloy reaches 38–45 HRC. Its low friction coefficient results in maintaining long-term dimensions in the presence of heavy loads or fretting wear.

Electrical and Thermal Conductivity: The electrical conductivity of copper alloys with high strength is placed at 22–28 %IACS. In addition, these alloys also possess a thermal conductivity of around 105–120 W/(m·K). This means these alloys can carry a large amount of electrical current while simultaneously dissipating heat.

Corrosion Resistance and Non-Magnetic Properties: This alloy also resists corrosion in air, seawater, sulfide, and chloride liquids while approaching pure copper in performance. In addition, alloys of this copper do not spark on impact and have a very low permeability of less than 1.001, making them completely non-magnetic.

Applications of ASTM B196 Beryllium Copper Alloy Round Rod

Aerospace: Landing gear bearing retainers, flap rail bushings, hydraulic servo valve cores, satellite solar wing torsion bars, and other parts requiring high strength, high elasticity, and non-magnetic properties.
Oil and Gas: Wear sleeves for measurement while drilling (MWD) instruments, downhole thrust bearings, and blowout preventer gate springs, resistant to H₂S-containing media and impact fatigue.
Automotive and New Energy: Airbag microswitch contact springs, hybrid motor commutators, and turbocharger wastegate valve stems, offering excellent electrical conductivity, heat resistance, and wear resistance.

Electronics and Communications: Over 10,000 mating cycles of 5G RF connector bodies, high-speed socket springs, and electromagnetic shielding springs while signal fidelity is maintained.

Precision Molds: Due to the high thermal conductivity and wear resistance of injection mold cores and hot runner nozzles, as well as die-casting mold sprue bushings, mold cycle times and mold cavity lifespans are enhanced.

Instruments: The high-end pressure sensor diaphragms, precision relay springs, and medical robot joint springs are crafted to accomplish equilibrium of high sensitivity and longevity.

Specifications of ASTM B196 Beryllium Copper Alloy Round Rod

Testing and Quality Control of ASTM B196 Beryllium Copper Alloy Round Rod

FAQ for ASTM B196 Beryllium Copper Alloy Round Rod

Are you an ASTM B196 Beryllium Copper Alloy Round Rod factory or an ASTM B196 Beryllium Copper Alloy Round Rod manufacturer?
A: Yes, we are an ASTM B196 Beryllium Copper Alloy Round Rod factory, but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.

What is the delivery method of ASTM B196 Beryllium Copper Alloy Round Rod?
A: Generally, we send ASTM B196 Beryllium Copper Alloy Round Rod by UPS, DHL, or FedEx. Also, we can send by sea to a seaport or by air to the closest airport.

Why is your ASTM B196 Beryllium Copper Alloy Round Rod so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process, and we obtain raw material directly from its source.

Do you do spot quality inspection of ASTM B196 Beryllium Copper Alloy Round Rod or full inspection of ASTM B196 Beryllium Copper Alloy Round Rod?
A: 100% full inspection for sure. All unqualified ASTM B196 Beryllium Copper Alloy Round Rods are discarded.

How do you ensure your lead time for ASTM B196 Beryllium Copper Alloy Round Rod?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.

What is the MOQ of ASTM B196 Beryllium Copper Alloy Round Rod?
A: Depends on the quantity of ASTM B196 Beryllium Copper Alloy Round Rod; generally, no MOQ limit.

How to pay for ASTM B196 Beryllium Copper Alloy Round Rod?
A: A bank transfer (T/T) will be acceptable.

What is the delivery time of ASTM B196 Beryllium Copper Alloy Round Rod?
A: Around 7-20 days, which depends on the quantity and production of ASTM B196 Beryllium Copper Alloy Round Rod.

What kind of package of ASTM B196 Beryllium Copper Alloy Round Rod is it?
A: Generally, we use a carton case or plywood case with protective material inside to ensure the safety of ASTM B196 Beryllium Copper Alloy Round Rod.

What is the lead time of ASTM B196 Beryllium Copper Alloy Round Rod?
A: From the order placed to cargo receiving will take around 10-25 days.

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