544 Bronze Round Bar 0.5 in x 12 in Unpolished H04 OnlineMetals

Description

Product Overview

The 544 Bronze Round Bar is a premium phosphorus bronze rod engineered to deliver consistent performance across a wide range of industrial applications. Manufactured by OnlineMetals, this bar features a 0.5 inch diameter and a 12 inch length, providing a versatile size that fits seamlessly into standard machining setups and tooling. The material conforms to ASTM B139 specifications, ensuring that each piece meets rigorous quality standards for chemical composition, mechanical properties, and dimensional accuracy. With an H04 temper, the bar offers a balance of strength and ductility, making it suitable for both precision machining and demanding load‑bearing tasks. The unpolished mill finish preserves the natural surface texture of the bronze, allowing for easy post‑processing such as polishing, coating, or machining to achieve the exact finish required for your project. This round bar is part of the 544 bronze family, commonly referred to as phosphorus bronze, known for its superior fatigue resistance, excellent formability, and high machinability, which translates into reduced tool wear and faster production cycles.

Usage

Designed for engineers, fabricators, and hobbyists alike, the 544 Bronze Round Bar excels in environments where reliability and precision are paramount. Its corrosion‑resistant properties make it an ideal choice for marine and outdoor applications, while its electrical conductivity supports use in connector assemblies and grounding components. Typical use cases include manufacturing of electrical connectors, bushings, gears, pinions, screw products, thrust washers, valves, and shafts. The bar’s dimensional stability ensures that critical tolerances are maintained even after heat treatment or prolonged service, reducing the risk of deformation under cyclic loads. In addition, the material’s low friction coefficient aids in the creation of moving parts that require smooth operation, such as gear teeth and bearing surfaces. Whether you are building a custom gearbox, fabricating a high‑performance valve stem, or prototyping a new mechanical linkage, this bronze rod provides the strength and workability needed to bring your designs to life.

Why Choose Us

OnlineMetals stands out as a trusted supplier of raw metal materials, offering rigorous quality control processes that guarantee each batch of 544 Bronze Round Bar meets or exceeds industry standards. Our inventory is sourced from reputable mills with a history of consistent alloy composition, ensuring that you receive material that performs exactly as specified. We provide detailed certification documents, including ASTM compliance reports, so you can verify the material’s properties before integration into your production line. In addition to product quality, we prioritize customer service; our knowledgeable support team is available to answer technical questions, assist with order specifications, and provide guidance on best practices for machining and finishing. Fast shipping options and secure packaging protect the bar from damage during transit, delivering it ready for immediate use. By choosing OnlineMetals, you benefit from a combination of premium material, reliable supply chain, and responsive after‑sales support that together reduce downtime and enhance overall project efficiency.

Key Features

• High‑quality phosphorus bronze composition delivers superior fatigue resistance for long‑lasting components.
• 0.5 inch diameter and 12 inch length provide a versatile size that fits standard machining equipment.
• H04 temper balances strength and ductility, allowing easy machining while maintaining structural integrity.
• Meets ASTM B139 standards, guaranteeing consistent chemical and mechanical properties across every piece.
• Dedicated customer support and technical assistance ensure you get the right material and guidance for your application.

FAQ

What does the H04 temper mean for this bronze bar?

H04 indicates a half‑hard temper that provides a good mix of strength and flexibility. The material is hardened enough to hold shape under load, yet soft enough to be machined with standard tools without excessive wear. This makes it suitable for both structural components and precision‑machined parts.

Is the unpolished mill finish suitable for all applications?

The mill finish is a raw, uncoated surface that retains the natural texture of the bronze. It is ideal for applications where you plan to apply a secondary finish such as polishing, plating, or coating. For environments that require a smooth, finished surface out of the box, additional processing may be necessary.

Can this bar be heat‑treated to improve its properties?

Yes, the 544 bronze alloy can be heat‑treated. Typical processes include annealing to relieve internal stresses and improve ductility, or solution treating followed by aging to enhance strength. Always follow recommended temperature ranges to avoid compromising the alloy’s corrosion resistance.

What are the typical tolerances for the diameter and length?

OnlineMetals supplies the bar with a diameter tolerance of ±0.001 inch and a length tolerance of ±0.010 inch. These tight tolerances ensure that the bar can be used in precision assemblies without the need for additional sizing operations.

How do I verify the material’s compliance with ASTM B139?

Each shipment includes a mill test report (MTR) that details the chemical composition, mechanical properties, and heat‑treatment condition of the alloy. The report references the specific ASTM B139 clause that the material meets, allowing you to confirm compliance before use.

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