Stainless steels treated with the patented Swagelok SAT12 service demonstrate significantly enhanced performance characteristics. Surface hardness increases by at least two times, and there are significant improvements in wear resistance, corrosion resistance, yield strength and fatigue properties without compromise to ductility. Below are specific outcomes.

This pump wear plate is used in a corrosive pulp and paper application. It's a sacrificial part of the pump housing that is normally changed as a result of wear, as often as every three weeks. Field tests indicate that the wear plate treated by the SAT12 process has lasted 25 months longer -- and still going -- than the untreated product.

• Increased Surface Hardness: When the SAT12 process is applied to austenitic stainless steels, you’ll find that the surface hardness increases by at least two times, relative to the core. Improvements occur at the surface of the treated stainless steel component, not all the way through to the core, which is why the process is referred to as “case hardening.”
   
• Increased Wear Resistance: The unique combination of hardness and ductility enhances wear resistance.
   
• Increased Fatigue Resistance: Higher compressive stresses means that treated components will have longer life in harsher environments. You’ll reap the benefits in applications that involve high frequency vibration and cyclical impulses.
   
• Maintained or Improved Corrosion Resistance: The corrosion resistance of your base stainless steel is maintained throughout the SAT12 process. And, in some media, you’ll benefit from improved corrosion resistance. For example, in a saltwater solution, specimens treated with the SAT12 process showed no damage after one week, whereas untreated specimens showed damage within hours.

Alloy 625 after 60 hours	Untreated 316L after an hour	Treated 316L after 160 hours

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