ISO 15614-2:2025

Overview - ISO 15614-2:2025 (Arc welding of aluminium and its alloys)

ISO 15614-2:2025 specifies how a preliminary welding procedure specification (pWPS) is qualified by welding procedure tests for arc welding of aluminium and its alloys. Applicable to production welding, repair welding and build‑up welding, the standard covers wrought and cast aluminium (the term “aluminium” includes alloys) and defines test execution, acceptance levels and the resulting welding procedure qualification record (WPQR). It supersedes the 2005 edition, aligns where practicable with ISO 15614-1 and adds processes such as autogenous TIG (process 142).

Keywords: ISO 15614-2:2025, welding procedure qualification, arc welding aluminium, WPS, WPQR, MIG, TIG, plasma welding.

Key technical topics and requirements

• Scope and applicability

  • Production, repair and build‑up welding of aluminium and aluminium alloys.
  • Excludes finishing welding of aluminium castings (covered by ISO 15614-4).

• Covered arc welding processes (ISO 4063:2023)

  • 131 - MIG with solid wire electrode
  • 141 - TIG with solid filler material (wire/rod)
  • 142 - Autogenous TIG
  • 15 - Plasma arc welding

• Preliminary Welding Procedure Specification (pWPS) and WPQR

  • Defines how a pWPS is tested and recorded.
  • Annex A gives an example WPQR form.

• Test pieces and welding procedure tests

  • Specifies shapes and dimensions for common joints: butt (plate and pipe), T‑joints, branch connections and fillet welds.
  • Details execution of welding procedure tests and permitted deviations.

• Examination and testing

  • Non‑destructive testing (NDT) requirements and locations for destructive specimens.
  • Destructive tests include transverse tensile, bend, fracture and macro/microscopic examination.
  • Acceptance levels and re‑testing rules are defined.

• Range of qualification

  • Rules for extending qualification: parent material grouping, thickness and pipe diameter limits, joint types, welding positions, filler metal, current type, arc energy/heat input, preheat/interpass and post‑weld heat treatment.

Practical applications - who uses ISO 15614-2:2025

• Welding engineers and procedure writers creating WPS/pWPS and WPQRs
• Fabricators and manufacturers working with aluminium structures and piping
• Quality managers and inspectors performing NDT and mechanical testing
• Certification bodies and auditors assessing compliance with welding procedure qualification requirements

Related standards

• ISO 15614-1 (general welding procedure tests)
• ISO 15614-4 (finishing welding of aluminium castings)
• ISO 4063:2023 (process classification)
• Normative references used in the standard: ISO 2107, ISO 3452-1, ISO 4136, ISO 5173, ISO 6520-1, ISO 6947, ISO 9017, ISO 10042:2018

ISO 15614-2:2025 is essential for organizations that must demonstrate technically sound, documented and qualified welding procedures for aluminium - improving consistency, quality and regulatory compliance in aluminium welding operations.