Industrial-Grade Large C18150 Chromium Zirconium Copper Tubing

Short Description:

Product Specifications
Name： Large Chromium Zirconium Copper Tube (Heavy CuCrZr Pipe)
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 Drawn, Smooth Internal/External Finish
Outer Diameter (OD)： 50mm – 300mm
Wall Thickness： 5mm – 50mm
Length： 1000mm – 6000mm (custom lengths 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 for large tubes · Consistent properties across thick walls
Application Field:
Resistance welding electrode cooling tubes, High-current electrical conduits, Heat exchangers in aggressive conditions, Plastic injection mold cooling channels, Spot welding gun arms, Die casting plunger cooling, Power generation cooling systems, Aerospace heat transfer components

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Large Chromium Zirconium Copper Tube – Process & Quality Assurance Statement
Our large chromium zirconium copper tubes are specifically developed for heavy-duty applications requiring sustained conductivity and mechanical strength at elevated temperatures, where standard copper would soften or lose performance.

Key process features

Production employs advanced metallurgical and extrusion techniques to maintain uniform properties in substantial diameters and wall thicknesses:

●Alloy Preparation: High-purity copper is alloyed with precise chromium and zirconium additions in controlled induction furnaces.
●Casting: Semi-continuous casting produces large ingots or hollow billets with homogeneous composition.
●Hot Extrusion: High-tonnage presses extrude the material into seamless tubes, refining grain structure and achieving high density.
●Solution Heat Treatment: Tubes are solution annealed at high temperature and rapidly quenched to create a supersaturated matrix.
●Cold Drawing: Multiple controlled draw passes refine dimensions, improve surface finish, and enhance straightness.
●Precipitation Aging: Low-temperature aging develops optimal hardness, strength, and conductivity balance.
●Final Sizing & Protection: Tubes are straightened, cut to length, and lightly oiled to prevent oxidation during storage and global shipping.

Quality control system

● Full traceability from raw alloy melt to finished tube
● 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 (ultrasonic wall thickness + micrometers; typical tolerance ±1% on OD/wall)
• Surface finish and ovality (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 large chromium zirconium copper tube delivers consistent, reliable performance in your most demanding high-temperature and high-conductivity applications.