Free-Cutting Copper Rod, Bar, Wire, and Shapes

B301/B301M- 13: Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes

For engineers and designers prioritizing high-speed machining and intricate component manufacturing, understanding material specifications is paramount. ASTM's B301/B301M- 13: Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes provides the essential framework for selecting and utilizing these specialized copper alloys, ensuring predictable performance and reliable production. This authoritative standard is a cornerstone for professionals aiming to optimize manufacturing processes and achieve superior product quality.

What is B301/B301M- 13?

ASTM B301/B301M- 13 is a comprehensive standard that defines the material requirements for free-cutting copper in various product forms. Developed by ASTM International, this specification ensures that copper rod, bar, wire, and shapes meet stringent criteria for chemical composition, temper, and physical properties, making them suitable for demanding machining applications. Its primary purpose is to provide a unified and reliable basis for procurement and manufacturing.

Scope & Purpose

This standard governs the production and quality of free-cutting copper alloys specifically designed for high-speed screw machine operations and general fabrication. It covers materials designated by UNS Alloy Nos. C14500, C14510, C14520, C14700, and C18700. While primarily intended for straight lengths, certain sizes can be furnished in coils upon request. The specification focuses on material properties and does not extend to the design or application of the final components.

Who Must Comply?

• • Primary audience: Materials Engineers, Metallurgists, Manufacturing Engineers, Quality Control Inspectors, and Procurement Specialists.
• • Industries affected: Aerospace, Automotive, Electronics, Industrial Machinery, and Plumbing sectors.
• • Compliance nature: Voluntary, but often mandated by industry best practices, customer specifications, or contractual agreements.
• • Enforcement: Typically verified through supplier certifications, internal quality assurance processes, and third-party audits.

Key Requirements Overview

The standard requires that free-cutting copper materials conform to specified chemical composition limits for elements such as tellurium, sulfur, phosphorus, and lead, depending on the UNS alloy designation. Professionals must ensure that the selected temper (e.g., H02 for half-hard, H04 for hard) aligns with the intended application and manufacturing process. Key provisions include adherence to defined mechanical and electrical properties, where applicable, and strict compliance with dimensional tolerances as detailed in related ASTM general requirement specifications.

Related Standards & References

ASTM B301/B301M- 13 is often used in conjunction with ASTM B249/B249M (General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings) and ASTM B250/B250M (General Requirements for Wrought Copper Alloy Wire). These complementary standards provide detailed information on dimensional tolerances, workmanship, and testing procedures that supplement the specific requirements of B301/B301M- 13, creating a comprehensive material specification.