DIN EN ISO 8503-4 1995 PDF

Full title and description

STB DIN EN ISO 8503-4:1995 — Preparation of steel substrates before application of paints and related products — Surface roughness characteristics of blast‑cleaned steel substrates — Part 4: Method for the calibration of ISO surface profile comparators and for the determination of surface profile — Stylus instrument procedure. This document specifies a stylus‑instrument measurement procedure and the calibration method for ISO surface profile comparators used to assess the roughness of abrasive blast‑cleaned steel.

Abstract

This part of ISO 8503 describes a stylus‑type profilometer procedure for calibrating ISO surface profile comparators and for determining the surface profile (peak‑to‑valley height) of essentially planar blast‑cleaned steel. The method is based on traversing a stylus across the surface (or a replica) to measure peak and valley heights, determining mean maximum peak‑to‑valley values at multiple locations (minimum ten), and calculating a grand mean to represent the surface profile. The procedure is intended for use where comparator assessment or stylus measurement is required for surface preparation and coating acceptance.

General information

• Status: Withdrawn / superseded (later edition published 2012).
• Publication date: 1 August 1995 (DIN adoption: 1995).
• Publisher: Deutsches Institut für Normung (DIN) — adoption of EN/ISO text.
• ICS / categories: 25.220.10 (Paints and varnishes; surface preparation and testing).
• Edition / version: DIN EN ISO 8503-4:1995 (original EN/ISO adoption edition).
• Number of pages: Approximately 9–10 pages (typical published PDF length for this edition).

Scope

This standard sets out the stylus‑instrument measurement technique and the calibration procedure for ISO surface profile comparators (as defined in ISO 8503‑1). It covers determination of the mean maximum peak‑to‑valley heights of blast‑cleaned steel surfaces or their replicas. The method is applicable to essentially planar, abrasive blast‑cleaned steel substrates and may be used where a quantitative measure of profile is required for coating specification, quality control or comparator calibration.

Key topics and requirements

• Definition and use of ISO surface profile comparators (reference segments for visual/tactile assessment).
• Stylus instrument specification and recommended measurement set‑up.
• Traversing procedure to measure peak and valley displacements across a defined traverse length.
• Calculation of mean maximum peak‑to‑valley height per traverse (Ry or equivalent amplitude parameter).
• Requirement to repeat measurements at a minimum number of locations (typically ≥10) and to calculate the grand mean.
• Use of replicas where direct measurement of the original surface is not feasible.
• Calibration procedure for ISO profile comparators against stylus instrument measurements.

Typical use and users

Used by coating specifiers, surface‑preparation contractors, inspection and quality control personnel, test laboratories and manufacturers of profilometers and profile comparators. Typical applications include pre‑coating inspection of steel substrates, comparator calibration, acceptance testing to coating project specifications, and laboratory verification of abrasive blasting processes.

Related standards

ISO 8503 series (other parts): ISO 8503‑1 (comparators — specification and definitions), ISO 8503‑2 (grading by comparator procedure), ISO 8503‑3 (calibration and determination using focusing microscope). ISO 8501 series (visual assessment of blast‑cleaned surfaces) and ISO 8504 (surface preparation — general principles) are commonly referenced together with this part. The 1995 edition of this part has been superseded by a later edition published in 2012 (ISO/DIN EN ISO 8503‑4:2012).

Keywords

surface profile, roughness, blast‑cleaned steel, stylus profilometer, comparator calibration, peak‑to‑valley, Ry, surface preparation, coating acceptance, replica measurement.

FAQ

Q: What is this standard?

A: It is the DIN/EN adoption (1995) of ISO 8503‑4 specifying a stylus‑instrument method to calibrate ISO surface profile comparators and to determine surface profile (peak‑to‑valley) of blast‑cleaned steel.

Q: What does it cover?

A: The standard covers the stylus measurement procedure, required measurements at multiple locations, calculation of mean maximum peak‑to‑valley values, use of replicas when needed, and the calibration of ISO surface profile comparators against stylus measurements.

Q: Who typically uses it?

A: Coating inspectors, surface‑preparation contractors, test laboratories, engineers specifying surface finish for coatings, and manufacturers of profilometers and comparator plates.

Q: Is it current or superseded?

A: The 1995 edition has been superseded by a more recent edition (ISO 8503‑4:2012 / DIN EN ISO 8503‑4:2012). For current, normative requirements and the latest measurement ranges and tolerances, refer to the 2012 edition or the currently active national adoption.

Q: Is it part of a series?

A: Yes — it is part 4 of the ISO 8503 series (Surface roughness characteristics of blast‑cleaned steel substrates). Related parts include ISO 8503‑1, ‑2 and ‑3 which cover comparators, grading procedures and an alternative microscope calibration/determination method.

Q: What are the key keywords?

A: Surface profile, roughness, stylus, profilometer, comparator, blast‑cleaned steel, Ry, calibration, replica, coating inspection.