Summary for stainless steel blasting media Discussion
stainless steel blasting media is the main issue in this thread: Sri Vijayan asks what shot or other recyclable medium can be used to blast railway coaches made of stainless steel and high tensile steel, and whether the existing shot-blasting plant can be modified. Ray Kremer of Stellar Solutions warns against using carbon steel shot on stainless steel because rust spots can appear later from contamination; he says other media are possible, but the surface finish will change, and glass bead media is probably the closest alternative to the current finish besides stainless steel shot. Umashankar Gupta suggests using stainless steel wire shot. A later question from Deependra Kumar asks generally about media and machines for coach shells and wagons, and the reply requests more details about the base metal and purpose of blasting before giving advice.
Q. I am an Engineer in a rail coach building industry in India. before painting we are blasting the coaches with steel shots. now we have to blast the coaches made of stainless steel sheets.
I want to to know is any shots or other medium available suitable to blast the coaches made of high tensile steel and stainless steel.
if we can use the existing shot blasting plant, what are the modification needed to be done on the machine viz., screw conveyor, wheels, etc
we are in need of blasting medium which is eco-friendly, recyclable one.
Sri Vijayan A
Engineer, buyer – Chennai, Tamil Nadu, India
Ed. note: This RFQ is outdated, but technical replies are welcome, and readers are encouraged to post their own RFQs. But no public commercial suggestions please ( huh? why?).
A. I do not think you want to use steel to blast SS. If you do, you are aware that in time it will appear as if the SS will develop rust spots from CS shot. You can use a number of other materials; however, your surface appearance will also change. Probably the closest you can come to the finish you are getting now, other than SS shot would be with glass bead media.
AF Kenton
retired business owner – Hatboro, Pennsylvania
October 9, 2009
A. Any non-ferrous shot material is fine for blasting stainless and will of course work for the carbon steel as well. However, you do not want to use the shot on carbon steel and then use that same shot on stainless. Keep your shot segregated between that used for your carbon steel and that used for your stainless steel.
Ray Kremer
Stellar Solutions, Inc.
McHenry, Illinois
October 13, 2009
December 17, 2009
A. Dear Sir,
I think you use s.s.wire shot.
Umashankar Gupta
– NAGPUR, India
October 3, 2009
Q. WHAT ARE THE BLASTING MEDIA AND MACHINES USED FOR BLASTING OF COACH SHELLS AND WAGONS?
DEEPENDRA KUMAR
IndiaN RAILWAYS – LUCKNOW India
February 13, 2015
Hi Deependra. What are these shells and wagons made of? Are they the same stainless steel (what grade) and high tensile steel (what grade) that Sri uses? Why are you blasting them — to remove graffiti, to repaint? Thanks. The more info you can give about your situation the more helpful the responses will probably be.
Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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February 2015