ISO 898-3:2018/Amd 1:2020

Overview

ISO 898-3:2018/Amd 1:2020 is an important amendment to ISO 898-3, which specifies the mechanical properties of fasteners made from carbon steel and alloy steel, focusing specifically on flat washers with specified property classes. Published by the International Organization for Standardization (ISO), this amendment enhances part 3 of the standard series dedicated to fasteners, ensuring up-to-date technical definitions and requirements that support quality, safety, and interoperability in engineering applications worldwide.

This amendment aligns with the broader ISO 898 series and is a product of collaboration between ISO/TC 2 (Fasteners) and the European Committee for Standardization (CEN/TC 185). It reflects the most recent consensus on mechanical performance criteria and testing methods for flat washers used alongside metallic fasteners.

Key Topics

• Focus on Flat Washers: The amendment refines specifications regarding flat washers made from carbon and alloy steels, which are critical components used to distribute load in bolted assemblies.
• Specified Property Classes: Introduces updates to property class designations that define mechanical strength and performance criteria.
• Technical Updates:
  • Revision of the title to include the term "Fasteners" for clarity and consistency across the series.
  • Modification of formulae related to mechanical characteristics (e.g., replacing Formula (1) to calculate effective force based on material hardness and thickness).
  • Removal of outdated references or footnotes in the bibliography to maintain document relevance.
• Standardization Process: Emphasizes compliance with ISO/IEC Directives for quality and international approval norms.
• Patent and Copyright Considerations: Clearly states protection of content to guide users correctly regarding permissions and legal use.

Applications

ISO 898-3:2018/Amd 1:2020 is essential for industries and sectors where reliable bolted connections are critical, such as:

• Manufacturing and Engineering: Ensuring flat washers meet mechanical property criteria minimizes failure risks in machinery, vehicles, and structural assemblies.
• Automotive and Aerospace: High-performance fasteners require washers with certified strength to meet safety and durability requirements.
• Construction: Compliance with this standard helps ensure the integrity of load-bearing connections using carbon steel or alloy steel fasteners.
• Quality Assurance: Manufacturers and suppliers use this standard to verify washer materials and mechanical properties, facilitating conformity and traceability.
• Design and R&D: Engineers can confidently select washers with specified property classes to optimize joint performance under expected loads.

Related Standards

ISO 898-3:2018/Amd 1:2020 is part of the broader ISO 898 series, which covers various types of fasteners and their mechanical properties. Relevant related standards include:

• ISO 898-1: Mechanical properties of bolts, screws, and studs made of carbon steel and alloy steel.
• ISO 898-2: Mechanical properties of nuts with specified property classes.
• ISO 898-4: Mechanical properties of set screws and similar threaded fasteners.
• ISO 3506 series: Mechanical properties of corrosion-resistant stainless steel fasteners, often used alongside ISO 898 series for comprehensive fastener specification.

For comprehensive implementation, users are encouraged to consult the full ISO 898 series and coordinate compliance with national and regional standards.

By adhering to ISO 898-3:2018/Amd 1:2020 requirements, professionals working with fasteners and washers ensure enhanced performance reliability, standardized material quality, and international compatibility-key factors driving safety and innovation in mechanical assembly design and production.