ISO 6621-3:2021

Name: ISO 6621-3:2021 — Internal combustion engines — Piston rings — Part 3: Material specifications
SKU: ISO 6621-3:2021
Price: 25 EUR
Availability: InStock

Internal combustion engines — Piston rings — Part 3: Material specifications

Название (английский):

ISO 6621-3:2021

Internal combustion engines — Piston rings — Part 3: Material specifications

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 16 июня 2021 г.
Издание:: ISO IS 6621 edition 3 version 1
ICS:: 43.060.10

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Язык документа:

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Цена:25 €

Описание (английский):

This document classifies materials intended for the manufacture of piston rings, based on their mechanical properties and the stresses the materials are capable of withstanding. This document is applicable to piston rings for reciprocating internal combustion engines up to and including those of 200 mm in diameter. It is also applicable to piston rings of compressors working under similar conditions.

Abstract

Overview

Key Topics

Material classes and subclasses: Materials are grouped into classes and more detailed subclasses (document uses MC codes) so manufacturers and clients can match ring performance requirements without relying solely on chemical composition. This allows different manufacturing routes to be compared by mechanical outcome rather than formulation alone.
Mechanical properties: Selection criteria are based primarily on modulus and bending strength; modulus determines the pressure a ring exerts on the cylinder wall for a given geometry. The standard highlights relationships between modulus and strength while noting exceptions based on manufacturing and heat treatment.
Hardness measurement: ISO 6507-1 is cited for Vickers HV30 testing of piston-ring base material. Hardness values in the document are averages from multiple measurements around the ring gap and are intended for classification; alternative hardness methods and equivalents are to be agreed between manufacturer and client.
Manufacturing and microstructure considerations: The document advises that final selection should account for coatings, heat treatment, and microstructure since these factors affect wear, friction and long-term performance.

Applications

ISO 6621-3:2021 is practically useful for:

Engine designers specifying piston rings for automotive, industrial and small- to medium-sized engines (diameter ≤ 200 mm)
Compressor manufacturers seeking ring material guidance under comparable operating conditions
Ring manufacturers and suppliers aligning material selection and testing with international practice
Quality and procurement teams using standardized material classes to specify rings, coatings and hardness requirements

Benefits include clearer communication between client and manufacturer, consistent testing procedures, and reduced risk from mismatched material properties.

Related Standards

ISO 6621-1: Vocabulary for piston rings
ISO 6621-2: Inspection and measuring principles
ISO 6621-4 and ISO 6621-5: General specifications and quality requirements for piston rings
ISO 6507-1: Vickers hardness test method (normative reference for hardness measurements)

For selection decisions, consult ISO 6621-3 alongside the related ISO 6621 series parts and discuss final subclass, coating and testing arrangements directly with ring manufacturers to ensure compliance with application-specific demands.

Технические детали

Технический комитет: ISO/TC 22/SC 34 - Propulsion, powertrain and powertrain fluids
SKU: ISO 6621-3:2021

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Каталог

ISO 6507-1:2018

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Metallic materials — Vickers hardness test — Part 1: Test method

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ISO 6621-1:2018

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Internal combustion engines — Piston rings — Part 1: Vocabulary

Overview ISO 6621-1:2018 provides a standardized vocabulary for piston rings used in reciprocating internal combustion engines and for compressors operating under analogous conditions. The document d…

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ISO 6621-2:2020

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Internal combustion engines — Piston rings — Part 2: Inspection measuring principles

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