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17.4PH Steel

17.4PH Steel

17.4PH Steel

(OP)
Hello!  I'm new to this forum, and I hope it's gonna be very usefull!!!

My question is the following:  I'm working in a paper mill that manufacture cardboard with 100% recycled paper... We have a lot of trashes into this waste paper (staples, steel wires, pieces of glass, sand....)  and we are experiencing a hard time with the gate valves installed on the filtration equipments that take care of removing these trashes from the paper pulp...  The gate in the valve is wearing very fast, and eventually was leaking, so we decided to go for a stronger material, Astraloy.  It seems to work pretty fine, but we received a proposal from a valve supplier who told us that his new gates mades of 17.4PH stainless steel will last longer... Does anybody can give me advices regarding this steel grade?  I never worked with that kind of steel before, and I'm wondering it it's really gonna last longer?  The gate needs to work in normal temperatures (between 40 and 60celsius) and very often needs to cut (when closing) steel wires, staples, cardboard boxes wires, tie-wraps, small pieces of glass......  Please give your opinion!  Thanks so much!

RE: 17.4PH Steel


There is a paper in Nickel Institute on selection of material for pulp and paper industry. Hope it helps .

http://www.nickelinstitute.org/index.cfm/ci_id/15786/la_id/1/ci_doc_id/3234/st_id/34/level/3.html



Pulp and Paper (14051)
By A.H. Tuthill and A.P. Castillo, reprinted from Pulp and Paper, Volume 73, Number 2, February 1999. Pulp and paper mill engineers must be concerned with the corrosion resistance, abrasion resistance and quality of the cast stainless steels used for pumps and valves. These products obviously play a very important role in pulp and paper mills due to the tremendous amount of water, chemicals and other materials that a typical mill processes. However, much less information is published or readily available on the use of these cast alloys compared to the extensive literature on wrought alloys. This article provides guidelines for addressing these three cast stainless steel properties, and choosing the correct material for various mill applications

" All that is necessary for triumph of evil is that good men do nothing".
Edmund Burke

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