ISO 21920-2:2021

Name: ISO 21920-2:2021 — Geometrical product specifications (GPS) — Surface texture: Profile — Part 2: Terms, definitions and surface texture parameters
SKU: ISO 21920-2:2021
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Geometrical product specifications (GPS) — Surface texture: Profile — Part 2: Terms, definitions and surface texture parameters

Название (английский):

ISO 21920-2:2021

Geometrical product specifications (GPS) — Surface texture: Profile — Part 2: Terms, definitions and surface texture parameters

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 78
Дата публикации:: 20 декабря 2021 г.
Издание:: ISO IS 21920 edition 1 version 1
ICS:: 01.040.17

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Описание (английский):

This document specifies terms, definitions and parameters for the determination of surface texture by profile methods. NOTE 1 The main changes to previous ISO profile documents are described in Annex I. NOTE 2 An overview of profile and areal standards in the GPS matrix model is given in Annex J. NOTE 3 The relation of this document to the GPS matrix model is given in Annex K.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 21920-2:2021 - Geometrical product specifications (GPS) - Surface texture: Profile - Part 2 defines the terms, definitions and surface texture parameters used to determine profile-based surface texture. Published in December 2021, this first edition consolidates and updates earlier profile standards (e.g., ISO 4287, ISO 12085, ISO 13565 series) and aligns profile parameters with the ISO GPS matrix model. The document is focused on profile measurement methods and establishes a common vocabulary and parameter set for consistent specification, measurement and reporting.

Key topics and technical requirements

Terminology and definitions for profile surface texture, including general terms, geometrical parameters and feature terms.

Field parameters organized by type:

Height parameters (e.g., arithmetic mean height, root mean square height, skewness, kurtosis, total height)
Spatial parameters (e.g., autocorrelation length, dominant spatial wavelength)
Hybrid parameters (e.g., root mean square gradient, developed length and ratios)
Material ratio functions and related parameters, including material ratio curve and volume parameters

Feature parameters based on peak/pit characterization and profile-element segmentation (spacing, heights, counts).

Feature characterization methods and named feature parameters, including normative procedures for segmentation (crossing-the-line, watershed-related approaches noted as an update).

Normative and informative annexes providing calculation methods (derivatives, curvature), determination procedures (material ratio curve, stratified surfaces), segmentation and feature-characterization workflows, and a summary of parameters.

References to filtration and GPS concepts (ISO 16610-1, ISO 14638) and decision rules (ISO 8015, ISO 14253-1) to ensure consistent application.

Practical applications

Specifying and verifying surface roughness and texture on engineering drawings and quality documents.

Supporting manufacturing process control (turning, milling, grinding, honing) by defining measurable texture metrics for acceptance.

Enabling tribology and sealing performance analysis where profile features (peaks, valleys, material ratio) affect friction, wear and lubrication.

Guiding metrology labs and instrument manufacturers on standardized parameter definitions and calculation methods for profilometers and evaluation software.

Useful for surface engineering, coatings, functional surfaces and failure analysis where quantitative profile descriptors are required.

Related standards

ISO 21920 series (profile and areal surface texture standards)

ISO 16610-1 (filtration concepts)

ISO 14638 (GPS matrix model)

ISO 8015 and ISO 14253-1 (GPS rules and decision rules)

Keywords: ISO 21920-2, surface texture, profile, GPS, surface roughness parameters, Ra, Rq, autocorrelation length, material ratio curve, surface metrology.

ISO 21920-2:2021

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards

Технические детали

ISO 4287:1997

Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface t…

BS EN ISO 12085:1997

Geometrical product specification (GPS). Surface texture. Profile method. Motif parameters.

BS EN ISO 13565-1:1998

Geometric product specifications (GPS). Surface texture: Profile method. Surfaces having stratified functiona…

BS EN ISO 16610-1:2015

Geometrical product specifications (GPS). Filtration. Overview and basic concepts.

BS EN ISO 14638:2015

Geometrical product specifications (GPS). Matrix model.

ISO 8015:2011

Geometrical product specifications (GPS) — Fundamentals — Concepts, principles and rules

BS EN ISO 14253-1:2017

Geometrical product specifications (GPS). Inspection by measurement of workpieces and measuring equipment. De…