Welding consumable classifications identify the chemical composition, mechanical properties and intended application of a filler metal, using standards such as BS EN ISO and AWS. Understanding these classifications helps you select the correct consumable and supports weld quality, compliance and traceability.
This page explains what classifications mean and covers the key standards for solid wires, TIG rods and gas-shielded consumables.
What do welding consumable classifications mean?
Welding consumable classifications identify the chemical composition, mechanical properties and intended application of a filler metal. Standards such as BS EN ISO and AWS use classification systems to help ensure the correct consumable is selected for a specific material and welding process. Understanding these classifications helps improve weld quality, compliance and traceability.
What is BS EN ISO 14341?
BS EN ISO 14341 is the international standard for solid wire electrodes and weld deposits used in gas-shielded arc welding of non-alloy and fine-grain steels. It specifies the chemical composition and mechanical properties required for classification. Many popular MIG wires, including ER70S-6 equivalents, comply with this standard.
What is BS EN ISO 636?
BS EN ISO 636 is the international standard covering TIG filler rods and wires for non-alloy and fine-grain steels. It classifies filler metals according to their chemical composition and mechanical performance. Using consumables manufactured to recognised standards helps ensure consistent weld quality.
What is AWS A5.18?
AWS A5.18 is the American Welding Society specification for carbon steel electrodes and rods used in gas-shielded arc welding. It includes classifications such as ER70S-6 and provides guidance on chemical composition and mechanical properties. Many welding consumables carry both AWS and BS EN ISO classifications.
Why are welding standards important?
Welding standards ensure consumables meet recognised quality, strength and performance requirements. They help engineers, fabricators and inspectors select suitable products and maintain consistency across projects. Using standards-compliant consumables also supports quality assurance and traceability.
Standards at a glance
- BS EN ISO 14341 — solid wire electrodes for gas-shielded arc welding of non-alloy and fine-grain steels (e.g. ER70S-6 equivalents).
- BS EN ISO 636 — TIG filler rods and wires for non-alloy and fine-grain steels.
- AWS A5.18 — American carbon steel electrodes and rods for gas-shielded arc welding (includes ER70S-6).