This document specifies a laboratory test procedure for the determination of the acceptable welding current range and the assessment of electrode life using a multi-spot test with specific conditions.
This document is applicable for the assessment of the weldability of uncoated and coated sheet steels of thicknesses up to 3 mm.
The test procedure specified in this document and the results obtained, apply only for the introduction of a new type or batch of material.
Procedures for determining the generic weldability lobe at a constant weld time or electrode force are given in EN ISO 14327.
The electrode life at constant machine settings is given in EN ISO 8166.
ISO 18278-2:2004 Referenced Document
EN 22768-1 General tolerances; part 1: tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989)
EN 22768-2 General tolerances; part 2: geometrical tolerances for features without individual tolerance indications (ISO 2768-2:1989)
EN ISO 14272 Resistance welding - Destructive testing of welds - Specimen dimensions and procedure for cross tension testing of resistance spot and embossed projection welds*, 2016-03-01 Update
EN ISO 14327 Resistance welding - Procedures for determining the weldability lobe for resistance spot, projection and seam welding
EN ISO 14329:2003 Resistance welding Destructive tests of welds Failure types and geometric measurements for resistance spot, seam and projection welds ISO 14329:2003
EN ISO 18278-1:2004 Resistance welding - Weldability - Part 1: Assessment of weldability for resistance spot@ seam and projection welding of metallic materials
EN ISO 5183-1 Resistance Welding Equipment - Electrode Adaptors, Male Taper 1:10 - Part 1: Conical Fixing, Taper 1:10 Supersedes EN 25183-1:1991; ISO 5183-1:1998
EN ISO 6520-2 Welding and allied processes - Classification of geometric imperfections in metallic materials - Part 2: Welding with pressure*, 2013-08-01 Update
EN ISO 8166 Resistance welding - Procedure for the evaluation of the life of spot welding electrodes using constant machine settings ISO 8166:2003
ISO 10447 Resistance welding — Testing of welds — Peel and chisel testing of resistance spot and projection welds*, 2022-11-25 Update
ISO 5182 Resistance welding - Materials for electrodes and ancillary equipment*, 2016-08-01 Update
ISO 669:2000 Resistance welding - Resistance welding equipment - Mechanical and electrical requirements
ISO 18278-2:2004 history
2016ISO 18278-2:2016 Resistance welding - Weldability - Part 2: Evaluation procedures for weldability in spot welding
2004ISO 18278-2:2004 Resistance welding - Weldability - Part 2: Alternative procedures for the assessment of sheet steels for spot welding