High-Conductivity Chromium Zirconium Copper Busbars for Welding

Short Description:

Product Specifications
Name： Chromium Zirconium Copper Busbar (CuCrZr Busbar)
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： Mill Finish or Precision Machined, Optional Tin-Plated
Width： 20mm – 300mm
Thickness： 3mm – 30mm
Length： 500mm – 6000mm (custom cut-to-length and hole patterns available)
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 formability · Consistent properties across large sections
Application Field:
Resistance welding electrode busbars, Plastic injection mold heating/cooling plates, High-current electrical distribution, Power generation and transmission systems, Spot welding machines, Die casting equipment, Aerospace and automotive high-temperature electrical components

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Chromium Zirconium Copper Busbar – Process & Quality Assurance Statement
Our chromium zirconium copper busbars are specifically developed for high-current and high-temperature applications where sustained conductivity and mechanical strength are critical, delivering superior long-term performance compared to standard copper busbars.

Key process features

Production combines advanced metallurgical processing with precision fabrication to ensure uniform properties and excellent surface quality:

●Alloy Preparation: High-purity copper is alloyed with precise chromium and zirconium additions in controlled induction furnaces under protective atmosphere.
●Casting & Hot Rolling: Ingots are cast and hot rolled into wide plates or bars, refining grain structure and achieving high density.
●Solution Heat Treatment: Material is solution annealed at high temperature and rapidly quenched to create a supersaturated matrix.
●Precipitation Aging: Controlled low-temperature aging develops optimal hardness, strength, and conductivity balance.
●Precision Fabrication: CNC cutting, punching, bending, and edge finishing create exact lengths, hole patterns, and custom shapes per customer requirements.
●Optional Surface Treatment: Tin plating or other coatings can be applied for enhanced corrosion resistance and improved contact performance.
●Final Cleaning & Packaging: Busbars are thoroughly cleaned and securely bundled with protective interleaving to prevent damage during global shipping.

Quality control system

● Full traceability from raw alloy melt to finished busbar
● 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 (laser measurement and CMM; typical tolerance ±0.2mm)
• Surface quality and flatness (profilometer + visual checks)
• Internal soundness (ultrasonic scanning on thicker sections)
● 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 busbar delivers consistent, reliable performance in your most demanding high-temperature and high-current applications.