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Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Welding Nitronic 60
Q. What occurs when Nitronic 60 is welded to 304 stainless steel? In our attempt to limit galling we have utilized Nitronic 60 welded to 304ss, machined as a seal surface in a metal-to-metal seal application. It appears, though, that the Nitronic 60 machines quite differently than 304 and we've noticed a few pockets in the weld. Does anyone know the very best process to weld Nitronic 60 to 304 to limit any inclusions?
Thanks,
- Elk Grove, California
2003
A. Need a few more details. What is the welding process? Shielding gas? What is the sulfur content of the 304? Sulfur content of the Nitronic 60? Laser welding produces high quality welds, but you likely want details on one of the arc welding methods (GTAW, GMAW, etc.).
Regarding machining, Nitronic 60 has at least twice the strength of 304 in the annealed condition, and therefore will require more cutting force during machining. Strain hardening is always a problem when machining stainless steel, and Nitronic 60 will be even worse.
- Michigan
2003
A. I am a certified Nitronic 60 welder. I use a trailing cup when tig or mig welding. It prevents inclusions and crystallization of the grains that are being mixed. There is also a few tricks of the trade to ensure a certified weld every time.
LLOYD KILLINGBECKmachining/welding - Boise, Idaho
2004
Q. Does anyone have any input on why Nitronic seems to be so difficult to get consistent weld joint results?
In the construction of our solenoid valves, we use Nitronic 50 that is Electron Beam welded to 430 CRES while inside a vacuum chamber. I have experienced the same type of porosity or inclusions after welding. We have tried extensive cleaning and have redesigned the weld joint from a light press fit to a close slip fit and are still seeing some problems. We have also varied the focus of the beam and the intensity of the current to change the penetration depth, in inches, form .060 up to .300 to drive the porosity thru the joint. We have also varied the pattern of the beam from a straight pencil type to a circular shape in order to increase the puddle size and thereby slow the cooling and allow the gas to escape. Two other parameters that we have looked at are the number of passes and the speed of each pass. All have had what I would consider, limited success.
solenoid valve manufacturer - New Jersey
2005
A. Field reports indicate that Nitrogen strengthened super-alloy steels are prone to severe outgassing when welded in a vacuum environment (such as with e-beam). This is due to the physical properties of this type of steel and cannot be avoided.
Darrell DiCicco- Princeton, New Jersey
2005
Q. What kind of tig rod and gas do you use when welding Nitronic 60 to 304 S.S.
Jim Pattenmachine works - Omaha, Nebraska
May 26, 2009
Q. We repair wear marks in automotive glass production equipment by building up the worn areas with small welds. The base metal is Nitronics 60 as is the filler rod we apply. This is done with the TIG process. The tooling operates at high temps, approximately 650 degrees C. After repeated repairs we notice small cracks occurring in the repaired areas. Are there any tricks to help prevent the cracks from occurring or is this a matter of changes taking place in the Nitronics after repeated heating and cooling cycles? Thanks for any input.
Mace Odneal- Rossford, Ohio
May 12, 2010
Q. Welding Nitronic 60 to steels? Has anybody had any experience with this combination?
Tony Hoult- California
January 19, 2012
Q. What filler rod should be used welding nitronic 60 to 17-4?
Nick Borton- Indiana
January 31, 2012
Q. It it possible to use C 22 (Hastelloy) filler metal to weld NITRONIC 50 ?
Harish Bobba- India
February 28, 2012
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