ISO 4382-2:2021

Overview

ISO 4382-2:2021 specifies the requirements for wrought copper alloys used in the manufacture of solid plain bearings, with a particular focus on bushes. This international standard provides a carefully selected range of copper alloys currently available for general applications, supporting quality, safety, and interoperability in mechanical engineering. It helps manufacturers, designers, and users ensure reliable performance, durability, and compliance in the production and utilization of plain bearings made with wrought copper alloys.

Key Topics

• Wrought Copper Alloys Selection: Outlines a limited but effective range of copper alloys suitable for solid plain bearings, including CuSn8P, CuZn31Si1, CuZn37Mn2Al2Si, and CuAl9Fe4Ni4.
• Material Properties: Defines essential material characteristics such as Brinell hardness, tensile strength, elongation, yield strength, modulus of elasticity, thermal expansion, thermal conductivity, and density.
• Application Guidance: Annex A provides recommendations for using different alloys based on load, sliding speed, lubrication quality, and shaft hardness compatibility.
• Chemical Composition: Lists the allowable composition range for each specified copper alloy, ensuring consistency and reliability in material performance.
• Safety Considerations: Highlights the recognized toxicity of lead (Pb) and advises compliance with local and international regulations.
• Designation System: Describes a standard method for designating bearing metals according to ISO 4382, alloy symbol, and minimum Brinell hardness value.

Applications

ISO 4382-2:2021 is essential for industries and professionals involved in the design, manufacture, and maintenance of solid plain bearings and bushes. Typical application areas include:

• Automotive industry: For bushings, engine components, and transmission systems requiring reliable sliding surfaces.
• Industrial machinery: In pumps, compressors, electric motors, and heavy-duty equipment utilizing plain bearings.
• Marine engineering: Thanks to excellent corrosion resistance, alloys like CuAl9Fe4Ni4 are suitable for marine and offshore components.
• General mechanical engineering: Offering wear resistance and adaptable mechanical properties for a variety of load and speed conditions.
• Custom bearing solutions: The documented guidance supports engineers in selecting the optimal copper alloy for specific operational requirements, improving bearing life and reducing maintenance costs.

When selecting a copper alloy for plain bearings, users benefit from clear material property data and practical advice to match shaft hardness for optimal service performance and longevity. The standard also assists in product specification, procurement, and quality assurance processes.

Related Standards

For comprehensive implementation and testing, ISO 4382-2:2021 is closely associated with other ISO standards, including:

• ISO 4379: Plain bearings - Copper alloy bushes, detailing additional requirements and specifications for copper alloy bushes.
• ISO 4384-2: Plain bearings - Hardness testing of bearing metals - Part 2: Solid materials, providing procedures for determining hardness values as referenced in ISO 4382-2.
• ISO 6892 (all parts): Metallic materials - Tensile testing, offering methods for evaluating mechanical properties of metals used in plain bearings.

Adhering to these related standards ensures a holistic approach to material selection, bearing design, quality control, and assessment for plain bearings using wrought copper alloys.

Keywords: ISO 4382-2:2021, wrought copper alloys, solid plain bearings, bushes, material properties, Brinell hardness, bearing metal selection, mechanical engineering standards, plain bearings specification, ISO standards for copper alloys