Overview
EN ISO 5755:2022 (ISO 5755:2022) - Sintered metal material - Specifications - is a harmonized CEN/ISO standard that defines requirements for the chemical composition, and the mechanical and physical properties of sintered metal materials intended for bearings and structural parts. This fourth edition (2022) supersedes EN ISO 5755:2012 and was prepared by ISO/TC 119 (Powder metallurgy) in collaboration with CEN.
Key topics and requirements
- Scope and purpose: Specifies limits and test requirements for sintered materials used in bearing and structural applications.
- Sampling: Rules for representative sampling of powder and sintered components for conformity assessment.
- Normative test methods: Procedures required for mandatory properties, including:
- Chemical analysis and element limits
- Open porosity and oil content determination
- Mechanical tests: tensile properties, radial crushing strength and related measurements
- Informative test methods: Additional property measurements that support design and quality control, such as:
- Density, Young’s modulus, Poisson’s ratio
- Elongation, impact energy, compressive yield strength
- Fatigue strength (rotating-bending, plane-bending, axial), apparent hardness
- Coefficient of linear thermal expansion
- Specifications and designations: Rules for specifying materials and the designation system (normative Annex A).
- Annexes:
- Annex B (updated) - metallography/microstructures of sintered materials
- Annex C (new) - tables of equivalence with other powder metallurgy standards
Practical applications and users
EN ISO 5755:2022 is used to:
- Specify and procure sintered bearings, bushings and structural parts with defined mechanical/physical properties.
- Support material selection in automotive, industrial machinery, and electrical/electronic assemblies where sintered components are used.
- Establish quality control and acceptance testing protocols in production and testing laboratories.
Typical users:
- Materials and component suppliers (powder metallurgy manufacturers)
- OEM design and materials engineers
- Quality assurance / metrology labs
- Procurement teams and standards/development committees
Related standards
This standard references and aligns with several powder metallurgy and test-method standards, for example:
EN ISO 5755:2022 is essential for consistent, internationally aligned specifications of sintered metal materials used in bearings and structural applications.
