alert icon

Internet Explorer 8 or 9 is not supported by this website. Please either update your version of Internet Explorer, or use a more up to date browser.

Hide Message hide icon
San Diego | Orange Fluid System Technologies

Your Authorized Swagelok Product and Service Center

Chloride Stress Corrosion

When faced with corrosive environments, companies may think exotic alloys are the only option. Because of Swagelok's elevated chromium and nickel levels, Swagelok fittings can provide engineered combinations for certain applications as a rated alternative to full exotic alloy solutions. Raw materials matter.

Whenever stainless steel is exposed to chloride concentrations and stress levels, Chloride Stress Corrosion Cracking (CSCC) can occur. While no stainless steel can be completely immune, Swagelok’s Alloy 316 Stainless Steel fittings have performed exceptionally well in testing. That can make Swagelok's engineered solutions for installations exposed to seawater both corrosion-resistant and cost-effective. 

Extensive CSCC testing compared the performance of 316 stainless steel nuts from Swagelok and eight other brands. Swagelok's nuts were the only brand to pass all tests. All other brands had nuts that cracked (39% of the non-Swagelok nuts), with 2.7% failing during the test completely. View the test results.

Stress corrosion

A picture is worth a thousand words: 316 Stainless Steel nuts from other brands had cracks visible to the naked eye after 700+ hours in the test environment.

When faced with corrosive environments, many companies think their only option is exotics. Because of our fittings’ elevated chromium and nickel levels, Swagelok can provide engineered combinations for certain applications as a rated alternative to full exotic alloy solutions. That can make Swagelok’s engineered solutions for installations exposed to seawater both corrosion-resistant and cost-effective.

Traditionally in corrosive environments, tubing and fittings of the same alloy have been used. Innovative thinking has led Swagelok to combine 316 stainless steel fittings with Tungum®, 904L, 6 Moly, and Alloy 825 tubing. This is possible, in large part, due to the proprietary chemical make-up of our steel.

Swagelok has options available to mitigate CSCC. Contact us for more guidance on this topic.