DIN EN ISO 13565-2 1998-04 PDF

Full title and description

DIN EN ISO 13565-2:1998-04 — Geometrical Product Specifications (GPS) - Surface texture: Profile method - Surfaces having stratified functional properties - Part 2: Height characterization using the linear material ratio curve. This document is the German (DIN) adoption of ISO 13565-2:1996 and was published in April 1998 in English and German language editions.

Abstract

This part defines the evaluation process for determining parameters from a linear representation of the material ratio (Abbott–Firestone) curve. It provides the graphical/construction rules and formulas used to extract functional height parameters that characterise plateau-type (stratified) surfaces and to aid assessment of their operational behaviour under mechanical stress.

General information

• Status: Withdrawn / superseded (national adoption withdrawn following revision of the international document).
• Publication date: 1 April 1998 (DIN adoption of ISO 13565-2:1996).
• Publisher: DIN (Deutsches Institut für Normung) as EN ISO adoption; original international text published by ISO as ISO 13565-2:1996.
• ICS / categories: 17.040.20 / 17.040.40 (Properties of surfaces; Geometrical product specification (GPS) — surface texture).
• Edition / version: DIN EN ISO 13565-2:1998-04 (adoption of ISO 13565-2, Edition 1996).
• Number of pages: 7 (national PDF edition; published page counts vary by national printings and language versions).

Scope

Specifies a method to characterise the height distribution of stratified (plateau-like) surface textures by deriving parameters from a linearised material ratio (bearing area / Abbott) curve. The standard describes how to construct the reference line on the material ratio curve (typically fitted to the central ~40% range), how to determine the core region and the separating horizontal intersections, and how to compute parameters that describe core roughness, reduced peak height and reduced valley depth for tribological assessment.

Key topics and requirements

• Definition and construction of the linear material ratio (Abbott–Firestone) curve used for plateau/stratified surfaces.
• Procedure to fit a straight line (typically to the central 40% of the material ratio curve) and to locate upper and lower horizontal intersections that delimit the core region.
• Primary functional parameters: Rk (core roughness depth), Rpk (reduced peak height), Rvk (reduced valley depth), Mr1 and Mr2 (material-ratio limits).
• Calculation rules for areas A1/A2 (peak/valley areas) and conversion to equivalent triangular approximations used to derive Rpk/Rvk.
• Requirements for measurement filtering (robust filtering for plateau surfaces) and evaluation length consistent with ISO profile measurement practices.

Typical use and users

Used by metrology and quality laboratories, automotive and engine manufacturers (cylinder liners, honed surfaces), bearing and seal designers, tribology researchers, and production engineers performing surface functional assessment or acceptance testing. Typical applications include assessment of running-in behaviour, lubricant retention, wear resistance and functional specification of plateau-honed and highly loaded contact surfaces.

Related standards

Commonly referenced profile and GPS standards include ISO 13565-1 (filtering and general measurement conditions for stratified surfaces), ISO 13565-3 (additional plateau parameters — now also withdrawn), ISO 4287 (profile terminology and parameters), and the newer ISO 21920-2 which has superseded the ISO 13565 series functions in the GPS matrix. National adoptions (EN/NF/DIN) of the same ISO documents also exist.

Keywords

surface texture, profile method, stratified/plateau surfaces, Abbott curve, material ratio curve, Rk, Rpk, Rvk, Mr1, Mr2, filtering, tribology, DIN EN ISO 13565-2, plateau honing

FAQ

Q: What is this standard?

A: DIN EN ISO 13565-2:1998-04 is the German (DIN) adoption of ISO 13565-2:1996; it describes how to characterise the height distribution of plateau-like surface textures using a linearised material-ratio (bearing area) curve and defines a set of functional height parameters.

Q: What does it cover?

A: It covers the graphical construction and numerical evaluation needed to extract parameters (Rk, Rpk, Rvk, Mr1, Mr2, A1, A2, etc.) from the material ratio curve of a profile filtered for plateau-type surfaces, and gives rules for the fitting and intersections used to delimit core, peak and valley regions.

Q: Who typically uses it?

A: Metrology/QA laboratories, OEMs in automotive and engine manufacturing, bearing and seal designers, tribologists and surface-engineering specialists who need functional surface parameters to predict running-in, wear and lubricant behaviour.

Q: Is it current or superseded?

A: The ISO 13565-2:1996 text (and national adoptions such as DIN EN ISO 13565-2:1998) has been withdrawn and the content/functional parameter set has been revised and consolidated within newer GPS/profile standards; ISO lists ISO 21920-2 as the newer available document that replaces and modernises parts of the 13565 series. Users should migrate to the current ISO/EN variant (ISO 21920-2 / corresponding EN versions) for up-to-date parameter definitions and measurement rules.

Q: Is it part of a series?

A: Yes — ISO 13565 was a multi-part series addressing plateau/stratified surface characterisation (parts 1, 2 and 3). Elements of that series have been superseded and consolidated into later GPS/profile standards (notably ISO 21920-2 and related profile/areal documents).

Q: What are the key keywords?

A: Abbott curve, material ratio curve, Rk, Rpk, Rvk, Mr1, Mr2, plateau surfaces, profile filtering, bearing area curve, tribology, DIN EN ISO 13565-2.