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Why use AL-6XN alloy? Corrosion resistance, cost-effectiveness, and availability are just a few of the many reasons.

AL-6XN alloy is very attractive to many industries, because it is resistant to a broad range of corrosive environments and provides a high return on investment. The biggest advantage is CSI's availability and large stock to address your high corrosion resistance requirements.

Corrosion in the forms of pitting, crevice, and stress corrosion cracking in 304 and 316 stainless steels are often better managed with AL-6XN alloy. This alloy is resistant to corrosion from various acids, salt solutions (sodium chloride) in hot and cold environments.

PREN The Pitting Resistance Equivalent Number (PREN or PRE) is used as a guide for comparing and ranking a material’s corrosion resistance. The PRE Number is calculated from a formula based on chemical composition.

In today’s market, there is a wide range of austenitic, superaustenitic, duplex, superduplex, and nickel-based alloys. Besides corrosion resistance, other factors should be taken into consideration, such as commercial availability, appearance, good mechanical properties, and fabrication characteristics.

Maximum, unless range or minimum is indicated. Values listed are primary elements only and are not complete chemical compositions as listed in specific product type specifications.GENERAL NOTES: The following are industry-accepted formulas. Other formulas may be used at the owner’s discretion. For stainless steels: PRE Number = %Cr + 3.3 [%Mo + 0.5(%W)] + 16(%N)

Corrosion is an expensive problem but can be prevented. If the process solution and manufacturing process cannot be modified, the selection of the right material is the next step.

Some of the direct and indirect factors to consider when doing a return on investment calculation:

Direct losses

Indirect losses

It is also a cost-effective substitute to non-metallic materials such as PVDF, PTFE, TPE, or PVC because of special equipment and techniques during installation as well as the additional support required to not deform the polymer when in process. AL-6XN uses the same welding technique as 316L.

Allegheny Technologies Incorporation (ATI) AL-6XN is covered by ASME and ASTM specifications associated with the various alloy products forms.

This material is acceptable for use per “Part MM” (Metallic Materials) section of the ASME-BPE international standard and US Food and Drug Administration (FDA), and National Sanitation Foundation (NSF).