9 Unacceptable Welds for High Purity Applications

9 Unacceptable Welds for High Purity Applications

Aug 12, 2015

Have you ever wondered why welds fail? When welding in a high purity environment, several factors can render a weld unacceptable: heat tint, a lack of...

How to Weld AL-6XN™

How to Weld AL-6XN™

Nov 1, 2011

Welding AL-6XN is a very similar process to welding other stainless steels, but there is one very important exception. This alloy requires an additional alloy to be consumed in the weld. The following video outlines these and other instructions for welding AL-6XN successfully.

Purging AL-6XN™ Tack Welds

Purging AL-6XN™ Tack Welds

Oct 18, 2011

“Purging” is the process of removing air that contains oxygen. Welding is a high-temperature process, so it is very important to keep oxygen and any other gases away from hot metal. We do this to avoid any kind of...

The Right Hands for the Job: Alloys

The Right Hands for the Job: Alloys

Mar 23, 2011

For any project requiring alloy equipment, the best thing to do is look at the experience and expertise with the alloy. The first requirement for a fabricator should at a minimum be ASME Section VIII Div 1 certified for the manufacture of pressure vessels, even for equipment not requiring pressure service.

Stress Corrosion Cracking

Stress Corrosion Cracking

Sep 17, 2010

Unexpected or premature failure of chemical process equipment constitutes a serious hazard in terms of personnel, plant, and environmental safety. By weakening reliability, such failures also adversely affect productivity and profitability. Modern experience in chemical plants has been that failures due to environmental cracking are among the most serious of such problems, making up about 20 to 30% of all corrosion failures. The purpose of this article is to discuss in simple terms some of the pertinent information.

Which Filler Wire Should I Use for Welding AL-6XN?

Which Filler Wire Should I Use for Welding AL-6XN?

Aug 13, 2010

Question: Which welding filler wire should we use when TIG welding AL-6XN tubing and fittings? Answer: Use C-22 weld insert rings. Do not attempt to apply filler wire manually. What’s the difference between filler wire and insert rings? Why does it matter? Literature from Allegheny Ludlum recommends using filler wire. As stated on...