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2. Weld purging - Wikipedia

   en.wikipedia.org/wiki/Weld_purging

   Weld purging is the act of removing, from the vicinity of the joint; oxygen, water vapour and any other gases or vapours that might oxidize or contaminate a welding joint as it is being welded and immediately after welding. [1] Stainless steels, duplex steels, titanium-, nickel- and zirconium- alloys are sensitive to the presence of air, oxygen ...

3. List of welding codes - Wikipedia

   en.wikipedia.org/wiki/List_of_welding_codes

   Structural steel welding - Welding of steel structures subject to high levels of fatigue loading AS/NZS 1554.6: Structural steel welding - Welding stainless steels for structural purposes AS/NZS 1554.7: Structural steel welding - Welding of sheet steel structures AS/NZS 3992: Pressure equipment - Welding and brazing qualification AS/NZS 4855

4. Shielding gas - Wikipedia

   en.wikipedia.org/wiki/Shielding_gas

   Other arc welding processes use alternative methods of protecting the weld from the atmosphere as well – shielded metal arc welding, for example, uses an electrode covered in a flux that produces carbon dioxide when consumed, a semi-inert gas that is an acceptable shielding gas for welding steel. Improper choice of a welding gas can lead to a ...

5. Rotary friction welding - Wikipedia

   en.wikipedia.org/wiki/Rotary_friction_welding

   The AISI 304 stainless steel has higher strength than the aluminum alloy. Hence, the formation of flashes was restricted to AA1050 aluminum only. [49] Rods Aluminium AA1050 and AISI 304 Stainless steel afret tensile test. [49] On this photo rupture occurring on aluminium site away from the bonding interface. Tungsten - steel weld. [50]

6. Austenitic stainless steel - Wikipedia

   en.wikipedia.org/wiki/Austenitic_stainless_steel

   In 200 series stainless steels the structure is obtained by adding manganese and nitrogen, with a small amount of nickel content, making 200 series a cost-effective nickel-chromium austenitic type stainless steel. 300 series stainless steels are the larger subgroup. The most common austenitic stainless steel and most common of all stainless ...

7. Stainless steel - Wikipedia

   en.wikipedia.org/wiki/Stainless_steel

   Stainless steel, also known as inox, corrosion-resistant steel (CRES), or rustless steel, is an iron-based alloy containing a minimum level of chromium that is resistant to rusting and corrosion. Stainless steel's resistance to corrosion results from the 10.5% or more chromium content, which forms a passive film that can protect the material ...

8. Welding Procedure Specification - Wikipedia

   en.wikipedia.org/wiki/Welding_Procedure...

   The AWS defines welding PQR as a record of welding variables used to produce an acceptable test weldment and the results of tests conducted on the weldment to qualify a Welding Procedure Specification. For steel construction (civil engineering structures) AWS D1.1 is a widely used standard.

9. Pitting resistance equivalent number - Wikipedia

   en.wikipedia.org/wiki/Pitting_Resistance...

   In general: the higher PREN-value, the more resistant is the stainless steel to localized pitting corrosion by chloride. PREN is frequently specified when stainless steels will be exposed to seawater or other high chloride solutions. In some instances stainless steels with PREN-values > 32 may provide useful resistance to pitting corrosion in ...