ISO R 632-1967 PDF

Full title and description

ISO Recommendation R 632:1967 — Methods of test for determining whether an electrode is a deep penetration electrode. The recommendation defines test procedures and criteria used to decide if a covered electrode qualifies as a "deep penetration" electrode (identifiable by the supplementing symbol "P").

Abstract

This short ISO Recommendation (R 632, 1st edition, November/December 1967) describes laboratory methods to evaluate penetration produced by covered welding electrodes and the conditions under which an electrode may be designated as a deep-penetration type (symbol P). The document specifies parent-metal characteristics for tests, test-piece preparation and the criteria for measuring penetration. The recommendation has since been withdrawn.

General information

• Status: Withdrawn.
• Publication date: 1967 (1st edition — November/December 1967).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.01 — Welding, brazing and soldering in general.
• Edition / version: Edition 1 (1967).
• Number of pages: 3 pages.

Scope

Describes test methods to determine whether a covered arc welding electrode should be classified as a deep-penetration electrode (designation: add symbol "P"). The recommendation specifies the required characteristics of the parent metal for testing (killed or semi-killed mild steel with tensile strength about 42–50 kgf/mm² and limits on C, S and P), methods to produce and examine test welds and criteria for measuring penetration. The document is procedural and intended to be used together with other ISO recommendations on electrodes and electrode coding.

Key topics and requirements

• Definition of "deep penetration electrode" and the use of the supplementing symbol "P".
• Specified parent-metal characteristics for test pieces (killed or semi-killed mild steel; tensile strength ~42–50 kgf/mm²; Carbon <0.18%, Sulphur <0.04%, Phosphorus <0.04%).
• Methods for preparation of weld test pieces and procedures for producing representative welds for penetration measurement.
• Measurement and evaluation techniques to determine penetration and pass/fail criteria for assigning the "P" symbol.
• Cross-references and relationship to other recommendations in the series (e.g., electrode symbol code and mechanical-property test methods).

Typical use and users

Used historically by welding engineers, electrode manufacturers (quality and product classification), test laboratories and national standards bodies for classification of covered electrodes. It was intended for application in product specifications, quality control and conformity assessment of welding consumables. Contemporary users will refer to it for historical context or when reviewing legacy electrode classifications; current practice should follow active IEC/ISO standards and national regulations.

Related standards

R 632 was published as part of a set of ISO Recommendations covering welding consumables and test methods. Documents referenced in the recommendation include ISO/R 635 (Code of symbols for covered electrodes) and ISO/R 615 (Methods for determining mechanical properties of deposited weld metal). R 632 has been withdrawn and is listed in historical indices of ISO recommendations (withdrawn without direct replacement in the ISO list). Users should consult later ISO standards on welding consumables and testing for current requirements.

Keywords

deep penetration electrode; electrode testing; welding electrodes; covered electrodes; symbol P; electrode coding; ISO/R 632; welding consumables; ISO/TC 44.

FAQ

Q: What is this standard?

A: ISO Recommendation R 632:1967 is a short ISO document that specified methods of test to determine whether a covered welding electrode qualifies as a deep-penetration electrode (designated by the supplementing symbol "P").

Q: What does it cover?

A: It covers test conditions, parent-metal requirements, procedures for producing test welds and measurement/evaluation techniques used to decide if an electrode meets the deep-penetration criteria. It does not cover every aspect of electrode performance—only the specific determination of penetration for classification.

Q: Who typically uses it?

A: Historically: welding engineers, electrode manufacturers, test laboratories and standards bodies involved in classification and quality control of welding consumables. Today it is mainly of historical or archival interest; current work should reference active ISO standards and national equivalents.

Q: Is it current or superseded?

A: It has been withdrawn (publication 1967; withdrawal recorded in the ISO lifecycle, commonly shown as withdrawn 1975). ISO lists R 632 as withdrawn; historical indices indicate it was withdrawn without a direct one-to-one replacement. For contemporary requirements, consult current ISO welding standards and the appropriate committees (ISO/TC 44).

Q: Is it part of a series?

A: Yes — the recommendation was issued as part of a group of ISO Recommendations covering electrodes and test methods (for example ISO/R 635 and ISO/R 615 are cited in the foreword). It was intended to work together with those recommendations on electrode coding and mechanical-property tests.

Q: What are the key keywords?

A: Deep penetration electrode; electrode testing; welding consumables; symbol P; covered electrodes; ISO Recommendation R 632; welding testing methods.