Durable Heat-Resistant Chromium Zirconium Copper Semi-Finished Products

Short Description:

Product Specifications
Name： Chromium Zirconium Copper Semi-Finished Blanks (CuCrZr Pre-Machined Products)
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： As-Forged / As-Extruded or Rough Machined
Diameter / Width： 20mm – 500mm
Length / Thickness： 50mm – 2000mm (custom sizes available)
Product Features:
Excellent electrical and thermal conductivity · Superior strength and hardness retention at high temperatures · Outstanding resistance to softening and wear · High fatigue strength under cyclic loading · Good machinability for final finishing · Consistent metallurgical properties throughout the blank · Cost-effective starting material for complex custom parts
Application Field:
Resistance welding electrodes and holders, Plastic injection mold inserts and cores, High-current electrical contacts, Die casting plungers, Spot welding tips and wheels, Heat exchanger components, Aerospace and automotive high-temperature parts, Power generation equipment

Send email to us

Product Detail

Product Tags

Video

Chromium Zirconium Copper Semi-Finished Blanks – Process & Quality Assurance Statement
Our chromium zirconium copper semi-finished blanks are produced as high-quality starting materials for customers who require reliable, high-performance components in demanding thermal and electrical applications. These blanks undergo full precipitation hardening treatment, allowing you to focus on final machining while ensuring consistent material properties.

Key process features

Production follows a tightly controlled metallurgical process to deliver uniform quality across every batch:

●Alloy Melting & Refining: High-purity copper is melted with precise chromium and zirconium additions under protective atmosphere to achieve the target composition with minimal impurities.
●Casting or Hot Working: Depending on final size and shape requirements, we use semi-continuous casting, hot extrusion, or open-die forging to create dense blanks with refined grain structure and excellent internal soundness.
●Solution Heat Treatment: Blanks are heated to dissolve alloying elements into solid solution, followed by rapid quenching to lock in the supersaturated state.
●Precipitation Aging: Controlled low-temperature aging develops the optimal balance of hardness, strength, and electrical conductivity throughout the entire cross-section.
●Rough Machining / Sizing: Blanks are sawed, turned, or milled to near-net dimensions with generous machining allowances, ready for your final finishing operations.
●Surface Cleaning & Protection: Thorough cleaning removes oxides and residues; parts are lightly oiled or coated to prevent oxidation during storage and international shipping.
●Documentation: Every batch is accompanied by full material certificates detailing chemical composition, mechanical properties, and heat treatment records.

Quality control system

● Complete traceability from raw material melt to finished semi-finished blank
● Material test certificates and heat treatment records provided 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 (hardness and conductivity testing on samples from each batch)
• Dimensional accuracy (CMM and ultrasonic measurement; typical tolerance as per customer drawing)
• Internal soundness (ultrasonic testing on larger sections)
• Surface condition (visual inspection)
● Internal standards exceed ASTM B768 and RWMA Class 2 requirements. Typical C18150 properties after full heat treatment:
Tensile strength ≥450 MPa, Hardness ≥140 HB, Electrical conductivity ≥80% IACS, Excellent resistance to softening up to 500°C.
● ISO 9001:2015 certified manufacturing ensures every chromium zirconium copper semi-finished blank delivers consistent metallurgical quality and reliable performance for your downstream machining and final applications.