Nov 30, 2011

High temperatures, low pH, and aggressive chemicals call for a material that exhibits the high corrosion resistance that traditional stainless steel alloys fail to attain. There are many alloys available to address the corrosion issues; but what makes super-austenitic stainless steel alloy AL-6XN® and nickel alloy C-22 the favorite materials for highly corrosive environments? Are the properties more attractive, or is the availability of the material in the required forms more desirable? Is one better than the other? Both AL-6XN and C-22 have a face-centered cubic lattice structure and contain...

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.

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...

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.

Feb 4, 2011

Question: If I purchase AL-6XN alloy (N08367) tubing or fittings to the ASTM A270-S2 specification, will they meet the low sulfur requirements? Many end users in pharmaceutical industry require the ASTM A270-S2 (pharmaceutical quality) tubing for their application. However, sulfur requirements are commonly misunderstood, and the ASTM A270 specification covers...

Jan 20, 2011

Many of our customers whose processes utilize high chloride materials or are subject to extremely corrosive applications know that the life span of a vessel which uses a properly specified nickel alloy or reactive (commercially pure) metal can justify the additional expense. While the cost of an alloy tank itself can be higher, remember to factor the additional costs incurred from downtime, maintenance, or replacement, including removal and installation.