Overview
ISO 14172:2023 defines the classification of covered electrodes for manual metal arc (MMA) welding and overlaying of nickel and nickel‑alloy materials. The standard classifies electrodes by the chemical composition of the deposited all‑weld metal, specifically covering compositions where nickel content exceeds that of any other element. It is the fourth edition and aligns with related ISO welding consumables guidance.
Key topics and requirements
- Scope and purpose
- Classification based on all‑weld metal chemistry for covered electrodes used in MMA welding and overlaying.
- Product symbol
- Covered electrodes for manual metal arc welding use the prefix “E”.
- Chemical composition symbol
- Composition symbols take the form Ni#### (e.g., Ni6056).
- The first digit indicates alloy class:
- 1 = nickel‑molybdenum alloys (Mo‑rich, low Cr)
- 2 = no significant alloy addition
- 4 = nickel‑copper alloys (Cu‑rich)
- 6 = nickel‑chromium with Fe < 25 %
- 8 = nickel‑chromium with Fe > 25 %
- Chemical analysis
- All‑weld metal chemical analysis is required (dispute specimens per ISO 6847). Analytical technique can vary; established published methods are recommended for disputes.
- Mechanical properties
- Mechanical property requirements for the deposited all‑weld metal are specified (see Table 2); tests use ISO 15792‑1 test assemblies with 4.0 mm electrodes.
- Rounding and reporting
- Measured values are rounded per ISO 80000‑1 rules; conversion to document units must occur before rounding.
- Additional content
- Clauses on retests, technical delivery conditions and designation procedures. Informative annexes cover the designation system, descriptions and uses of consumables, and corresponding national classifications.
Applications and users
ISO 14172:2023 is used by:
- Welding consumables manufacturers for product classification, marking and quality control.
- Procurement teams and specifications writers selecting covered electrodes for nickel alloys.
- Welding engineers, inspectors and QA/QC personnel verifying chemical and mechanical compliance of welding filler metals.
- Fabrication industries using nickel and nickel‑alloys (chemical processing, power generation, marine, oil & gas, aerospace) where specific weld metal chemistries are required for corrosion resistance, high‑temperature strength or other service properties.
Related standards
- ISO 6847 - deposition of weld metal pad for chemical analysis
- ISO 15792‑1 - test methods for all‑weld metal specimens (nickel alloys)
- ISO 544, ISO 14344 - delivery and procurement of filler materials
- ISO 80000‑1 - quantities, units and rounding rules
Keywords: ISO 14172:2023, welding consumables, covered electrodes, manual metal arc welding, nickel alloys, Ni classification, all‑weld metal, chemical composition, welding standard.
Open preview (PDF)Welding consumables — Covered electrodes for manual metal arc welding of nickel and nickel alloys — Classification