Overview
EN ISO 12153:2022 (ISO 12153:2022) specifies the classification requirements for tubular‑cored electrodes used in metal‑arc welding of nickel and nickel alloys, with or without a gas shield. The standard covers electrodes where nickel is the predominant element in composition and defines how these welding consumables are designated, analyzed and documented. This edition (2022) supersedes the 2012 version and includes updated alloy chemistries and new alloy symbols.
Key topics and technical requirements
- Classification system: Designation comprises five parts - product/process symbol, all‑weld metal chemical symbol (Ni + four digits), electrode‑core type, shielding gas, and welding position.
- Chemical composition: Table‑based limits for all‑weld metal chemistry (e.g., nickel‑copper, nickel‑chromium, nickel‑molybdenum families). Chemical analysis procedures are required on all‑weld metal test specimens (ISO 6847 referenced).
- Mechanical properties: Minimum mechanical property requirements for all‑weld metal are specified and linked to the alloy classification (see tables in the standard).
- Symbols and markings: Standardized symbols for core type, shielding gases (per ISO 14175 with NO for no gas), and welding positions (ISO 6947) ensure consistent labelling.
- Testing & delivery: Chemical analysis, test piece preparation (ISO 15792‑1), rounding/retest procedures and technical delivery conditions (ISO 544, ISO 14344) are referenced.
- Updates in 2022 edition: Revised chemistries for several classifications, new alloy symbols added, and some mechanical property adjustments.
Practical applications and users
- Welding engineers and fabricators - select appropriate tubular‑cored electrodes for welding nickel and nickel alloy components in industries such as chemical processing, power generation, aerospace and marine.
- Consumable manufacturers - classify and mark products to meet EN ISO 12153:2022 for market conformity across CEN member countries.
- Quality, inspection and procurement teams - use the standard for procurement specifications, material acceptance testing and supplier audits.
- Standards bodies and certification authorities - reference the standard when establishing national or project‑level welding rules and technical delivery conditions.
Related standards
EN ISO 12153:2022 references and aligns with several ISO documents important for implementation:
Keywords: EN ISO 12153:2022, ISO 12153:2022, tubular‑cored electrodes, welding consumables, nickel alloys, classification, gas‑shielded welding, non‑gas‑shielded welding, all‑weld metal composition.
