ISO 10042-2018 PDF

Full title and description

ISO 10042:2018 — Welding — Arc-welded joints in aluminium and its alloys — Quality levels for imperfections. PDF of the International Standard describing production acceptance criteria (dimensional and visual limits) for typical surface and subsurface imperfections found in arc‑welded aluminium joints.

Abstract

This standard specifies three graded quality levels (B, C and D) for imperfections in arc‑welded joints in aluminium and its alloys (material thicknesses > 0.5 mm). It gives dimensional limits and assessment rules for common imperfections (porosity, linear porosity, crater cracks, undercut, incomplete penetration, excess weld metal, overlap, sagging, etc.), provides worked examples for porosity assessment (Annex A) and is intended as a reference for application codes, purchase specifications and quality control systems. ISO 10042:2018 addresses production quality (not fitness‑for‑purpose) and applies to MIG/GMAW, TIG/GTAW and plasma arc welding in all positions and joint types.

General information

• Status: Published (confirmed during periodic review).
• Publication date: June 2018 (Edition 3; published 25 June 2018).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 25.160.40 (Welded joints and welds).
• Edition / version: Edition 3 (2018).
• Number of pages: 18 (PDF).

Scope

ISO 10042:2018 applies to arc‑welded joints in aluminium and its alloys with material thicknesses greater than 0.5 mm. It covers all common joint types (butt, fillet, branch connections), welding positions and manual, mechanized or automatic arc processes (MIG/GMAW, TIG/GTAW, plasma). The standard defines production acceptance limits for visible and measurable imperfections and provides guidance for assessing porosity and clustered defects. Metallurgical properties and detailed NDT techniques are excluded (the standard does not prescribe NDT methods but gives correlation guidance to relevant NDT acceptance levels).

Key topics and requirements

• Three quality levels (B, C, D) with graded dimensional acceptance limits; B is most stringent.
• Comprehensive list of imperfection types drawn from ISO 6520‑1 (surface porosity, clustered porosity, linear porosity, crater cracks, cracks, undercut, incomplete fusion/penetration, excess weld metal, overlap, sagging, etc.).
• Numeric limits and size/count criteria for single imperfections and clustered/area porosity (given in Table 1 of the standard).
• Rules for assessment (projection/area methods, how to treat adjacent imperfections, reference lengths and measurement conventions).
• Worked examples for determining percent porosity and projected areas (Annex A).
• Statement that quality levels address production quality, not fitness for purpose; selection of level should consider service conditions and design consequences.
• Notes on correlation with non‑destructive testing acceptance levels (reference to relevant NDT guidance standards) but no prescription of specific NDT methods.

Typical use and users

Used by welding engineers, fabricators, quality managers, inspectors and procurement/specification writers to define and check acceptable production quality for aluminium welded components. Also used by designers and certification bodies to select appropriate production acceptance levels, and by NDT practitioners to relate visual quality acceptance to NDT acceptance criteria when required.

Related standards

ISO 6520‑1 (classification of geometric imperfections in metallic materials) — provides the imperfection nomenclature used in ISO 10042. ISO 17635 (and other NDT acceptance guidance) — used for correlation between visual quality levels and NDT acceptance. ISO 10042:2005 (previous edition) — superseded by the 2018 edition. EN ISO 10042:2018 and national adoptions reflect regional publishing of the same content.

Keywords

aluminium welding, arc welding, quality levels, imperfections, porosity, acceptance criteria, welding inspection, MIG, TIG, plasma, ISO 10042, visual inspection

FAQ

Q: What is this standard?

A: ISO 10042:2018 is an ISO International Standard that defines production acceptance quality levels (B, C, D) and dimensional/visual limits for typical imperfections in arc‑welded joints made from aluminium and its alloys.

Q: What does it cover?

A: It covers assessment rules and numeric acceptance limits for surface and subsurface imperfections (porosity, cracks, undercut, incomplete penetration, excess weld metal, overlap, etc.) in arc‑welded aluminium joints for material thicknesses greater than 0.5 mm. It applies to MIG/GMAW, TIG/GTAW and plasma arc processes and to all welding positions and common joint types.

Q: Who typically uses it?

A: Welding engineers, fabricators, quality/inspection personnel, spec writers, designers and NDT practitioners use it to set and assess production quality levels and to include clear acceptance criteria in purchase specifications and contracts.

Q: Is it current or superseded?

A: The 2018 edition (Edition 3) is the current published edition of ISO 10042; it replaced earlier editions (including the 2005 edition). The document is subject to periodic review by ISO and was confirmed in subsequent reviews.

Q: Is it part of a series?

A: It is part of ISO technical work in welding (ISO/TC 44) and is closely linked with ISO 6520‑1 (imperfection classification) and NDT acceptance standards such as ISO 17635. Regional/adopted versions (for example EN ISO 10042:2018) exist for European and national publishing.

Q: What are the key keywords?

A: Aluminium welding, arc‑welded joints, quality levels, imperfections, porosity assessment, acceptance criteria, visual inspection, ISO 10042.