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Category: Welding Methods & Procedures

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  1. A fabrication and erection specification for stainless steel - DD ENV 1090 Part 6

    DD ENV 1090 Part 6 is the new fabrication and erection specification for stainless steel. It covers austenitic and duplex stainless steels used in buildings and other similar steel structures.

  2. Design strengths of welded connections

    This article gives recommendations for full and partial penetration butt welds and fillet welds made by an arc welding process. The adequacy of a weld at ultimate limit state may be determined by the simple method of BS 5950:1. The Geometric parameters required for the calculation of design strength are the effective length of the weld and the effective throat size, whilst guidance is given on suitable range for the angle of intersection at the joint.

  3. EN 1090 - A Guide for Stainless Steel

    A guide to EN 1090 for stainless steel related issues

  4. Fabricating Duplex Stainless Steel

    Duplex Stainless Steels are growing at a high rate. It is important to understand how they differ from the more familiar stainless steels and how these differences affect the fabrication methods and parameters 

  5. Fume associated with welding and cutting stainless steels

    Both flux- and gas-shielded processes for welding stainless steels generate fume. So does plasma arc cutting. Fume consists of both particles and gases, including ozone. Concerns that fume, particularly particles containing hexavalent chromium, is a cause of cancer have not been supported by extensive studies, although there is a slight excess of lung cancers among all welders. Therefore it is sensible to limit contact with welding fume and there are statutory requirements.

  6. Popular processes for welding stainless steels

    Summary information on eight popular welding processes used on stainless steels is given. The welding processes covered are: gas tungsten arc welding (GTAW or TIG), plasma arc welding (PAW), shielded metal arc welding (SMAW or MMA), gas metal arc welding (GMAW or MIG/MAG), flux cored arc welding (FCAW or FCW), submerged arc welding (SAW), electric resistance welding (ERW) and Laser welding.

  7. Reference Photo Guide for Stainless Steel Weld Quality

    Welding of stainless steel is a critical operation in ensuring that the material is in an optimum condition for its intended service. This photo guide shows examples of good and bad practice.

  8. Stainless Steel Pipe Fabrication

    This review examines recent developments in inert gas purging and demonstrates where significant cost savings can accrue through the use of specialist contemporary purging equipment when welding pipes and tubes.

    This review is by Dr Mike Fletcher of Delta Consultants.

  9. The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

    Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds.

  10. Welding of Stainless Steel

    An overview of welding stainless steels is given, with particular reference to the various welding methods that can be used. These include Gas Tungsten Arc Welding (GTAW or TIG) Plasma Arc Welding (PAW) Shielded Metal Arc Welding (SMAW or MMA) Gas Metal Arc Welding (GMAW or MIG / MAG) Flux Cored Arc Welding (FCAW or FCW) Submerged Arc Welding (SAW) Electric Resistance Welding (ERW) Laser Welding. Standards mentioned include BSEN1600 BSEN12072 BSEN12073 BSEN760 BSEN287 Part1 (Approved testing of welders for fusion welding) BSEN288 Part 3 Welding Procedure tests for the arc welding of steels.

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