ISO 13919-2:2021

Overview

ISO 13919-2:2021 specifies requirements and recommendations on quality levels for imperfections in electron‑beam and laser‑beam welded joints made from aluminium, magnesium (and their alloys) and pure copper. The standard gives three producible quality levels (B, C, D) and dimensional limits for typical welding imperfections (porosity, cracks, lack of fusion, undercut, excessive penetration, etc.). It applies to welds with or without filler wire and to materials of ≥ 0.5 mm thickness. ISO 13919-2 is intended as a reference for drafting application codes, contracts and quality plans; it addresses production quality (visual/macro examination) rather than fitness‑for‑purpose or metallurgical properties.

Key topics and technical requirements

• Quality levels B, C, D: three sets of dimensional limits are provided so designers and purchasers can select the appropriate production quality for the application (B = more stringent).
• Imperfection limits: numerical limits for surface and internal imperfections (e.g., cracks are generally not permitted; porosity/cavities have specific size and projected‑area limits depending on quality level).
  • Example: cavity/projected porosity limits are expressed both as maximum single pore size (d) and maximum projected area fraction (f) relative to weld area (different limits for B, C, D).
• Scope of examination: directly applicable to visual and macro examination; imperfections detectable at up to 10× magnification are considered. Micro‑cracks and micro lack‑of‑fusion may be excluded or handled separately.
• Limitations and exclusions: metallurgical aspects (grain size, hardness, hydrogen embrittlement in copper) are not covered. The standard does not prescribe NDT methods and notes difficulties applying the limits directly to ultrasonic, radiographic or penetrant testing - additional inspection requirements may be needed.
• Guidance annexes: Annex A gives examples for determining percentage porosity; Annex B offers additional application guidance.

Applications

ISO 13919-2 is used to:

• Specify production acceptance criteria for electron and laser beam welding on aluminium, magnesium and copper components.
• Inform inspection and quality control plans for welded fabrications in aerospace, automotive, electronics, heat‑exchanger and precision‑manufacturing sectors.
• Support contract specifications, procurement documents and design standards where visual/macro weld quality is required.
• Serve as a basis for drafting application‑specific welding codes and qualification documents.

Who should use this standard

• Welding engineers and metallurgists
• Quality managers and inspectors
• Designers and procurement/specification authors
• Standards writers and certification bodies

Related standards

• ISO 6520-1 (weld imperfections classification) - referenced for imperfection designations
• ISO 10042 (arc‑welded joints in aluminium - quality levels) - referenced for fillet welds
• ISO 5817 - referenced alignment with imperfection criteria

Keywords: ISO 13919-2, electron beam welding, laser beam welding, aluminium welding, copper welding, magnesium welding, weld imperfections, quality levels, visual examination, porosity, lack of fusion, non‑destructive testing.