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Factors to consider are presented, focusing on material thicknesses , hardness, strength, and the presence of coatings.
Applicable British Standards are mentioned.
The UK organisation NAFEMS is introduced.
Similarities in joining challenges regardless of scale are addressed, with reference to reliability.
Guidance to obtain good weld quality is provided.
Factors that influence surface wettability are discussed briefly, in the context of manual soldering.
Scope of the Standards is set out and a brief comparison is presented.
Relevant EN Standards are listed.
Relevant Standards for USA, Japan and ISO are listed.
Effects of welding on the mechanical properties of TMCP steels are outlined.
The situation covering welding procedures and their qualification is set out, with reference to transferability according to Standards.
Maximum operating temperatures and temperature ranges are discussed.
The distinction based on filler metal melting temperature is presented.
Repair of imperfect resistance spot welds is discussed.
Situations where PWHT can be omitted are discussed, including notes on use of the half bead and temper bead techniques.
Application of 'P' numbers and 'S' numbers is discussed with reference to welding procedure qualification.
Examples of ceramic to metal friction welds are presented.
The situation for thermoplastic and for thermosetting types of adhesive is explained briefly.
Means of ensuring alignment are mentioned.
Guidance is given on making a welded lap joint using friction stir welding.
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