C17500 Beryllium Cobalt Copper Round Sleeve
Grade: UNS C17500 / CuCo2Be / DIN 2.1285 / CW104C
• High-conductivity hollow sleeve: Custom ID, OD, and wall thickness with 45–60% IACS conductivity for current-carrying bearing and bushing applications
• RWMA Class 3 certified material: UNS C17500, CuCo2Be, CW104C conforming to ASTM B441, AMS 4534, SAE J461
• Advanced bore machining: Precision lathe turning, CNC deep-hole drilling, and bore honing for tight concentricity and superior surface finish
Description
C17500 Beryllium Cobalt Copper Round Sleeve – High-Conductivity Bushing for Welding & Precision Applications
The C17500 Beryllium Cobalt Copper Round Sleeve (UNS C17500, CuCo2Be, CW104C, DIN 2.1285) is suitable for intricate mechanical, electrical, and thermal operating conditions. It achieves 700–1000 MPa tensile strength, HRC 30–38 hardness, 45–60% IACS conductivity, and 180 W/m·K thermal conductivity during age treatment. It compensates for the performance limits of regular chromium copper and C17200 copper alloy by maintaining steady performance at temperatures as high as 480°C. With a steady batch supply, our plant facilitates one-stop manufacturing from smelting to precise CNC machining.
What Makes C17500 Different from Other Copper Alloy Sleeves?
The performance trade-off of traditional copper sleeves is resolved by the C17500 Beryllium Cobalt Copper Round Sleeve, which strikes a balance between conductivity and mechanical hardness. In order to accommodate current-carrying situations, this grade has two to three times the electrical conductivity of the high-hardness C17200 with low conductivity. After age, its 2.0–2.7% cobalt concentration generates stable precipitates that stabilize mechanical characteristics and internal structure throughout prolonged high-temperature thermal cycling.
Material Specifications
| Property | Value |
|---|---|
| Grade / Standard | UNS C17500 / CuCo2Be / DIN 2.1285 / CW104C |
| Beryllium (Be) Content | 0.40–0.70% |
| Cobalt (Co) Content | 2.0–2.7% |
| Base Material | Cu Balance (Cu + Named Elements ≥ 99.5%) |
| Tensile Strength | 700–1000 MPa (age hardened, temper dependent) |
| Hardness | HRC 30–38 (HB 280–350) |
| Electrical Conductivity | 45–60% IACS |
| Thermal Conductivity | ~180 W/m·K |
| Max. Service Temperature | 480°C (softening resistance) |
| ID/OD Dimensional Tolerance | ±0.005 mm (precision honed, size dependent) |
| Concentricity | ≤ 0.01 mm |
| Compliance Standards | ASTM B441, AMS 4534, SAE J461, RWMA Class 3 |
| Magnetic Properties | Non-magnetic |
| Spark Characteristics | Non-sparking |
Key Product Features
Precision Dimension Control: Completed by CNC drilling, turning, and bore honing, it satisfies the requirements for precise assembly of mold accessories and welding equipment.
Dual Supply Status: TH04 pre-aged temper may be utilized straight away without further processing, while TB00 annealed temper allows post-installation aging hardening.
High Thermal integrity: Suitable for long-cycle mold production, it provides steady heat dissipation and structural integrity with repeated high-temperature operation.
Safe Use: Suitable for mining, petrochemical, and combustible workplaces; non-magnetic and non-sparking.
Application Areas
Resistance welding equipment, which complies with RWMA Class 3, is used to weld electrode arm bushings in order to minimize heat buildup during cycle operation.
Injection Molding: Reduces mold cycle time and speeds up heat dissipation by acting as cooling core sleeves and hot runners.
Die Casting Industry: Used in shot sleeves and plungers to prevent thermal shock and erosion from molten metal.
Electrical Contact Parts: Fits rotating bearing structures that transport current to lower resistance heating and increase service life.
Quality Control Process
We implement three-stage full-process inspection including raw material verification, in-process monitoring and finished product testing. OES composition detection, hardness and conductivity testing, CMM dimensional calibration and internal defect inspection are completed before delivery. All shipments are equipped with complete MTC certificates with full material traceability.
Handling and Safety Notes
Solid finished sleeves are safe for daily handling. Dust and particles generated by cutting and grinding need centralized collection and protective operation, complying with occupational health management standards for beryllium-containing alloys.
FAQ
Q1: What is the difference between C17500 and C17200?
A1: C17500 adds cobalt for higher conductivity, suitable for current-carrying scenarios; C17200 has higher hardness for heavy-load structural use.
Q2: Are dual temper options available?
A2: Yes, TB00 soft temper for post-installation aging and TH04 hardened temper for direct installation are both available.
Q3: What machining tolerance can be achieved?
A3: Precision honing ensures ±0.005 mm size tolerance and ≤0.01 mm concentricity.
Q4: Are finished products safe to use?
A4: Solid sleeves cause no hazards; only dust-generating machining needs protective measures.
Q5: What industry standards do products comply with?
A5: It meets ASTM B441, AMS 4534, SAE J461, and RWMA Class 3 standards with supporting MTC certification.
Contact Us
Send your technical parameters and customization demands tojs01@jstongcai.com.cn. Our team will provide professional technical guidance and detailed quotes within 24 hours for your C17500 Beryllium Cobalt Copper Round Sleeve projects.
