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Welding the Corrosion-Resistant Alloys Conference

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Conference Disclaimer

Each nonmember attendee will receive a two-year complimentary membership in AWS.
The registration fee does not include hotel accommodations. Hotel accommodations are subject to hotel regulations and are the responsibility of the attendee.
As an added benefit, AWS Conference attendees are awarded 1 PDH (Professional Development Hour) for each hour of conference attendance. These PDH’s can be applied toward AWS recertifications and renewals.

Wednesday, November 18, 2009 • 9:00 AM – 4:00 PM
Chairs: Robert R. Irving and Ralph Davison
Member of AWS, FMA, SME, NAM, or PMA: $345
Nonmembers: $480 • Registration Code: W24
Room N133

The interest level is extraordinarily high when it comes to the welding of corrosion-resistant alloys. There are many reasons for this. One is the entry of the duplex stainless steels and other high-performance grades. Another is the unstable prices in nickel, molybdenum and titanium. When the price of nickel hit the roof, many fabricators switched from 316 to 201 stainless because the latter grade’s lower nickel content. Research is feverish throughout the world in the development of new and cheaper methods of producing titanium. Will a lower-cost titanium make the metal more popular? Read More

Conference Program

Lean Duplex Stainless Steel Chemical Cargo Tanks

9:00 AM – 9:30 AM
Gary Carinci, President, Technical Marketing Resources
A lean duplex stainless 2101 has been developed with low addition of nickel to reduce costs. Low nickel content is compensated by an increase in manganese and nitrogen to assure a balanced microstructure with approximately equal amounts of ferrite and austenite, for a yield strength more than twice that of 316 and 304 stainless steels. Lean duplex is also resistant to stress corrosion cracking, has better pitting resistance, and is being welded by the gas metal arc process.

The Thermal Stir Welding Process

9:35 AM – 10:05 AM
Jeff Ding, Aerospace Welding Engineer, NASA Marshall Space Flight Center
The thermal stir welding, developed by the NASA’s Marshall Space Flight Center, is similar to friction stir welding in that the weld seam is consolidated without liquefying the parent material. Unlike FSW, the heating, stirring, and forging elements of the process are decoupled, allowing independent, dynamic control of each process element.

Friction Stir Welding and Processing

9:30 AM – 10:05 AM
Murray Mahoney, Consultant
General discussion of FSW including metal flow and defect avoidance, temperature gradient issues, lap vs. butt joints, some tool material and tool design considerations, current applications, FSW limitations, benefits such as properties and the solid state benefits of welding unweldable alloys and zero emissions, all as they apply to Al, Cu, and Fe based alloys. Friction stir processing will also be covered.

Evaluation of Higher Interpass Temperatures When Welding 304L and 316L Austenitic Material

10:10 AM – 10:40 AM
Matthew Yarmuch, co-authors are Iulian Radu and Ken Armstrong of PCL Industrial Constructors. Yarmuch is Program Leader, Welding Engineering, Advanced Materials Business Unit
A reassessment was made of maximum interpass temperature limits while welding 304L and 316L pressure equipment materials, to significantly improve welding productivity. Higher interpass temperatures can be tolerated without compromising the sensitization-corrosion resistance of the weldment. Not exceeding the critical threshold of “time at the sensitization temperature” is paramount to ensure weldment quality.

Strip Overlay Weld Cladding of Specialty Stainless Steel Alloys Sandvik

10:45 AM – 11:15 AM
Frank S. Babish, Technical Manager Welding Products, Sandvik Materials Technology, Welding & Wire Products Division
The presentation covers strip overlay welding of specialty stainless steel alloys using the electroslag welding process, allowing high deposition rates of metallurgically clean weld deposits. Alloys include duplex and superaustenitic alloys. Applications for the nuclear industry will be included.

Alternative Welding Processes for the Fabrication of Titanium Structures

11:20 AM – 11:50 PM
Nick Kapustka, Applications Engineer, Arc Welding, Lasers & Automation, Edison Welding Institute; co-authors: Suhas Vaze and Chris Conrardy
Work is underway at Edison Welding Institute to make the gas metal arc welding process a useful and effective means for welding Ti-6Al-4V. It was necessary to provide adequate inert gas shielding, arc stability, and contact tip life. Other processes include friction stir welding and hybrid laser welding.

Lunch on your own

11:50 AM – 1:00 PM

Welding Metallurgy of Duplex Stainless Steels

1:00 PM – 1:30 PM
Damian Kotecki, President, Damian Kotecki Welding Consultants, Inc.
Duplex stainless steel weld metal solidifies as 100% ferrite, and the HAZ near the fusion boundary also forms 100% ferrite. It is essential that austenite nucleates and grows in both areas in order for proper properties to be obtained. The critical role of nitrogen in this process is explained. Then remaining ferrite can transform to undesirable phases such as sigma.

Explosion Welding to Join Dissimilar Metals

1:35 PM – 2:05 PM
Michael Blakely , Director of Market Development, Dynamic Materials Corp.
Explosion welding focuses on joining both similar and dissimilar metals. A value proposition exists when certain materials are required in specific applications for corrosion resistance, light-weighting or temperature distribution, and solid material is impractical.

The 200 Series Stainless Steels and the Lean Duplex Stainless Steels: Why They Should Be Considered

2:10 PM – 2:40 PM
Cheryl A. Botti, Manager, Market and Product Development, ATI Allegheny Ludlum
Popularity in the use of 200 series stainless steels where 300 series stainless have been traditionally specified continues. Advantages exist with respect to raw material volatility. This talk will address the issues involved with switching to another grade of stainless steel. The popularity of lean duplex stainless steels to replace 300 series stainless steels also continues to grow.

PCBN Tools for Friction Stir Welding

2:45 PM – 3:15 PM
Jeff Defalco, Business Manager, ESAB Welding & Cutting Products
With the development of pin tools produced from polycrystalline cubic boron nitride and its associative composites, the range of corrosion-resistant, high melting temperature materials joined by FSW has grown, including austenitic and super duplex stainless steels and various nickel-base alloys. Pin tool technology and its impact on joining these alloys is presented.

Corrosion Resistance of New Ni-Cr-Mo and Ni-Mo-Cr Alloys

3:20 PM – 3:55 PM
Henry J. White, Senior Staff Engineer, Welding Metallurgist, Haynes International, Inc.; Co-authors: N. S. Meck, N. Koon, and P. Manning
Alloys Ni-21Cr-17Mo and Ni-22Mo-17Cr are two new materials from Haynes International for use in the chemical process and oil and gas industries, respectively. We will discuss the corrosion properties of the base materials, arc weldments, and laser weldments, each being exposed to a variety of conditions.

Welding the Corrosion-Resistant Alloys Conference

Conference Program

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