Articles About The SAT12® Process
Skid integrators get to grips with
tubing challenge
Bill Menz, Swagelok
Tony Taylor, AGI Packaged Pump Systems
Reprinted courtesy of
OE (Offshore Engineer) © January 2010
Summary
Integrators charged with building chemical injection skids for medium-pressure applications face some formidable obstacles. Two of the chief obstacles concern critical fluid system components: medium-pressure instrument ball valves and reliable end connections for use with SAF 2507 tubing. AGI found a solution in Swagelok’s mechanical grip tube fitting rated for medium-pressure connections to SAF 2507 tubing. The stainless steel ferrules on the tube fitting are able to grip even SAF 2507 tubing because they are fully case hardened with the SAT12 service, a patented, low-temperature carburization process.
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Skid integrators get to grips with tubing challenge
 
Hard Case of Stainless
Mechanical Engineering Magazine, 2007
Summary
Mechanical Engineering Magazine explores the SAT12 patented surface-hardening process and the implications for hardness, wear and fatigue.
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Hard Case of Stainless
Low Temperature Collosal
Super-Saturation
Engineering Materials Achievement Award
Sunniva Collins
Swagelok Company
Swagelok won the 2006 Engineering Materials Achievement Award for its surface treatment that both hardens the surface of stainless steel and improves corrosion resistance.
Introduction
Low-temperature colossal super-saturation (LTCSS) is a novel surface hardening method for carburization of austenitic stainless steels without the precipitation of carbides. The formation of carbides is kinetically suppressed, enabling extremely high or colossal carbon supersaturation.
As a result, surface carbon concentrations in excess of 12 at.% are routinely achieved. This treatment increases the surface hardness by a factor of four to five, improving resistance to wear, corrosion, and fatigue, with significant retained ductility.
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Low Temperature Collosal Super-Saturation
 Colossal Carbon Supersaturation in Austenitic Stainless Steels Carburized at Low Temperature
Y. Cao, F. Ernst, G.M. Michal
Department of Materials Science and Engineering
Case Western Reserve University
Abstract
A novel, low-temperature (470°C) gas-phase carburization treatment, developed by the Swagelok Company, increases the surface hardness of 316 austenitic stainless steels from 200 to 1000 HV25 and improves the corrosion resistance. While normally the precipitation of carbides restricts the carbon concentration in the austenite of 316 steels to 0.015 at %, the Swagelok treatment generates a colossal supersaturation of up to 12 at % carbon in solid solution. Only upon extended treatment, does carbide precipitation eventually occur, but the colossal carbon supersaturation of the austenite is maintained. Unusual for austenitic stainless steels, the precipitates are Hagg carbide (M5C2).
© 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
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Colossal carbon supersaturation in austenitic stainless steels carburized at low temperature
Carbon Paraequilibrium in Austenitic Stainless Steel
G.M. Michal, F. Ernst, and A.H. Heuer
Department of Materials Science and Engineering
Case Western Reserve University
Email: gmm3@case.edu
This article is based on a presentation made in the ‘‘Hillert Symposium on Thermodynamics & Kinetics of Migrating Interfaces in Steels and Other Complex Alloys,’’ December 2–3, 2004, organized by The Royal Institute of Technology in Stockholm, Sweden.
Abstract
Carburization of austenitic stainless steels under paraequilibrium conditions—i.e., at (low) temperatures where there is essentially no substitutional diffusion—leads to a family of steels with remarkable properties: enhanced hardness, resulting in improved wear behavior, enhanced fatigue, and corrosion resistance, and with essentially no loss in ductility. These enhanced properties arise from an enormous carbon solubility, which, absent carbide formation, is orders of magnitude greater than the equilibrium solubility.
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Carbon Paraequilibrium in Austenitic Stainless Steel
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