Stainless steel is generally helpful in welding.
Stainless steel pipe welding procedures.
This numbering system will be used on all welding procedure specifications revised or developed in the future.
Below is a basic step by step guide to follow when welding stainless steel.
How to tig weld stainless steel.
Stainless steel base metals are grouped primarily into three classes depending on their crystal structure.
Mode of metal transfer.
Tig welding is traditionally used for welding stainless steel tube and pipe and remains the optimal solution for extremely high purity applications on tube or pipe at or below 6 inch diameter and schedule 10 wall thickness.
Welding on metal that is wet is strictly prohibited.
The preferred method for high purity food grade stainless steel is an autogenous tig square butt weld.
B31 1 b31 9 etc that preheat shall be used for production welding.
In resistance welding lower current can be used because resistivity is higher.
Even though most of the welding machine manufacturers have included a table of materials and voltage settings in the machine it is highly important for you to pick the right kind of gas and electrode wire to be used for mig welding stainless steel.
Stainless steels which require special welding procedures are discussed in later sections.
4 stainless steel welding characteristics by definition stainless steels are iron base alloys containing 10 or more chromium which imparts to the metal the.
Wet metal shall be heated until it is at least warm to the touch to assure removal of moisture.
When higher preheat is required by the applicable construction code i e.
The new d1 1 spells out the requirements for design procedures qualifications fabrication inspection and repair of steel structures made of tubes plate and structural shapes that are subject to either static or cyclic loading.
Tig welding stainless steel is performed by using a non disposable tungsten electrode with a tig welder for striking up the arc.
Since welding pipe in the 6g position covers all of the pipe welding positions the information on this page can be applied to welding.
Backgroundthe new ncpwb welding procedure specification numbering system clearly defines the type of metals to be welded the welding process used and allows for identification of variations in a process.
Stainless steel alloys usually have a chromium content of a least 10.
This is basically a common and unique process for joining stainless steel.
In the welding procedure specification.
Alternative gases that you can use are 98 argon and 2 co2 or 98 argon and 2 oxygen mix.
Less welding heat is required to make a weld because the heat is not conducted away from a joint as rapidly as in carbon steel.
For everyone involved in any phase of welding steel structures engineers detailers fabricators erectors inspectors etc.
This process also uses shielding gas against contamination but you can weld thinner metals more efficiently.
The pipe welding techniques used and the procedure is also identical to the asme section ix pipe welding certification.
