This International Standard specifies requirements for resistance spot welding in the fabrication of assemblies of uncoated and metallic coated low carbon steel, comprising two or three sheets of metal, where the maximum single sheet thickness of components to be welded is within the range 0,4 mm to 3 mm, for the following materials:
— uncoated steels;
— hot-dip zinc or iron-zinc alloy (galvannealed) coated steel;
— electrolytic zinc, zinc-iron, or zinc-nickel coated steel;
— aluminium coated steel;
— zinc-aluminium coated steel.
This International Standard is applicable to welding of sheets of the same or dissimilar thickness, where the thickness ratio is less than or equal to 3:1. It applies to the welding of three thicknesses, where the total thickness is less than or equal to 9 mm.
Welding with the following types of equipment is within the scope of this International Standard:
a) pedestal welding equipment;
c) automatic welding equipment where the components are fed by robots or automatic feeding equipment;
e) robotic welders.
b) gun welders;
d) multi welders; Information on appropriate welding equipment is given in Annex A, and information on spot welding conditions is given in Annex B. This information is provided for guidance only.
Depending on the service conditions of the fabrication, the type of welding equipment, the characteristics of the secondary circuit, the electrode material, and the shape, it is possible that certain modifications are necessary. In such cases, further information can be obtained from the relevant application standard, where one exists.
The welding of organic coated or primer coated steels is not within the scope of this International Standard.
ISO 14373:2015 Referenced Document
ISO 10447:2015 Resistance welding - Testing of welds - Peel and chisel testing of resistance spot and projection welds
ISO 14270:2000 Specimen dimensions and procedure for mechanized peel testing resistance spot, seam and embossed projection welds
ISO 14329:2003 Resistance welding - Destructive tests of welds - Failure types and geometric measurements for resistance spot, seam, and projection welds
ISO 15609-5 Specification and qualification of welding procedures for metallic materials - Welding procedure specification - Part 5: Resistance welding
ISO 3573:2012 Hot-rolled carbon steel sheet of commercial and drawing qualities
ISO 3574:2012 Cold-reduced carbon steel sheet of commercial and drawing qualities
ISO 3575:2011 Continuous hot-dip zinc-coated carbon steel sheet of commercial and drawing qualities
ISO 4950-1:1995 High yield strength flat steel products - Part 1: General requirements
ISO 4950-2:1995 High yield strength flat steel products - Part 2: Products supplied in the normalized or controlled rolled condition
ISO 4998:2014 Continuous hot-dip zinc-coated and zinc-iron alloy-coated carbon steel sheet of structural quality
ISO 5000:2011 Continuous hot-dip aluminium-silicon-coated cold-reduced carbon steel sheet of commercial and drawing qualities
ISO 5002:2013 Hot-rolled and cold-reduced electrolytic zinc-coated carbon steel sheet of commercial and drawing qualities
ISO 5182:2008 Resistance welding - Materials for electrodes and ancillary equipment
ISO 5184:1979 Straight resistance spot welding electrodes
ISO 5821:2009 Resistance welding - Spot welding electrode caps
ISO 5830:1984 Resistance spot welding; Male electrode caps
ISO 669:2000 Resistance welding - Resistance welding equipment - Mechanical and electrical requirements
ISO 9364:2011 Continuous hot-dip 55 % aluminium/zinc alloy-coated steel sheet of commercial, drawing and structural qualities
ISO 14373:2015 history
2024ISO 14373:2024 Resistance welding — Procedure for spot welding of uncoated and coated low-carbon steels