Durable High-Conductivity CuCrZr Sleeves

Short Description:

Product Specifications
Name： Chromium Zirconium Copper Bushing (CuCrZr Sleeve)
Standard： ASTM B768, RWMA Class 2, UNS C18150, RoHS Compliant, REACH Compliant
Material： C18150 (Chromium Zirconium Copper, Cr 0.5-1.5%, Zr 0.03-0.3%)
Surface： Precision Machined, Smooth Finish, Optional Oil Grooves
Inner Diameter (ID)： 10mm – 300mm
Outer Diameter (OD)： 20mm – 400mm
Length： 20mm – 500mm
Product Features:
Excellent electrical and thermal conductivity · Superior strength retention at high temperatures · Outstanding softening and wear resistance · High fatigue strength under cyclic loading · Reliable performance in repeated heating/cooling cycles · Good machinability and dimensional stability · Consistent properties in demanding environments
Application Field:
Resistance welding electrode holders, Plastic injection mold components, High-current electrical contacts, Heat exchanger sleeves, Spot welding tips and dies, Die casting plungers, Power generation components, Aerospace and automotive high-temperature parts

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Chromium Zirconium Copper Bushing – Process & Quality Assurance Statement
Our chromium zirconium copper bushings are engineered for applications requiring sustained conductivity and mechanical strength at elevated temperatures, where standard copper alloys would soften or degrade.

Key process features

Production employs advanced metallurgical and machining techniques to maintain uniform properties in sleeve form:

●Alloy Preparation: High-purity copper is alloyed with precise chromium and zirconium additions in controlled induction furnaces.
●Casting: Semi-continuous casting produces dense blanks or hollow billets with homogeneous composition.
●Hot Extrusion or Forging: Material is hot worked into near-net sleeve shapes, refining grain structure and achieving high density.
●Solution Heat Treatment: Bushings are solution annealed at high temperature and rapidly quenched to create a supersaturated matrix.
●Cold Working & Aging: Controlled reduction followed by precipitation aging develops optimal hardness, strength, and conductivity balance.
●Precision Machining: CNC turning, boring, and honing achieve exact ID/OD tolerances and smooth bearing surfaces.
●Surface Protection: Final cleaning and light oiling prevent oxidation during storage and global shipping.

Quality control system

● Full traceability from raw alloy melt to finished bushing
● Comprehensive material test certificates and heat treatment reports supplied with every shipment
● Sample retention ≥3 years for third-party verification (SGS, BV, TÜV, etc.)
● 100% inspection of critical parameters:
• Chemical composition (optical emission spectrometry)
• Mechanical properties (tensile, hardness, and conductivity tested at multiple locations)
• Dimensional accuracy (CMM and bore gauges; typical tolerance ±0.05mm on ID/OD)
• Surface finish and roundness (profilometer + visual checks)
• Internal soundness (full ultrasonic scanning)
● Internal standards exceed ASTM B768 requirements. Typical C18150 aged properties:
Tensile strength ≥450 MPa, Hardness ≥140 HB, Electrical conductivity ≥80% IACS, Excellent stability up to 500°C without significant softening.
● ISO 9001:2015 certified facility ensures every chromium zirconium copper bushing delivers consistent, reliable performance in your most demanding high-temperature and high-conductivity applications.