selecting best grade of stainless steel
selecting best grade of stainless steel
(OP)
I'm trying to specify stainless steel bars (3/4" or 1" diameter, hex or square x 18" long) to be used in an abrasive environment as a survey monument. They will need to be welded and very hard to resist erosion. I'm looking at cost, availability and workability. Specifically 303, 304 and 316. Which would be the best?





RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
Hardness for erosion resistance and welding are arch enemies of each other, as typically very hard things are not easily welded due to cracking problems.
Given that, if the weld will be out of the erosion zone and you need some corrosion resistance, you could harden the surface of stainless steel by nitriding, flame spray with a hard coating or weld overlay with hard coating. You could also use a solid bar of something like Stellite 6 which is hard, erosion resistant and can be welded to other parts
RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
If you think education is expensive, try Ignorance.
- Andy McIntyre
_____________________________________
RE: selecting best grade of stainless steel
is CA6NM readily available to an earthwork contractor and weldable? The project involves earthwork and concrete only, no hydro-electric so I am not sure our contractor will be able to readily aquire this material. How much are these monuments going to cost?
RE: selecting best grade of stainless steel
If you think education is expensive, try Ignorance.
- Andy McIntyre
_____________________________________
RE: selecting best grade of stainless steel
I hate to say it but under your condition there are only a few fairly exotic metals that would hold up.
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Plymouth Tube
RE: selecting best grade of stainless steel
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RE: selecting best grade of stainless steel
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: selecting best grade of stainless steel
If you think education is expensive, try Ignorance.
- Andy McIntyre
_____________________________________
RE: selecting best grade of stainless steel
RE: selecting best grade of stainless steel
If you think education is expensive, try Ignorance.
- Andy McIntyre
_____________________________________
RE: selecting best grade of stainless steel
If you think education is expensive, try Ignorance.
- Andy McIntyre
_____________________________________
RE: selecting best grade of stainless steel
I wouldn't use any of those and if it is used as a monument, I would specifically design it to have a screwdown cover either with a threaded cap or with flat head screws.
I would use AISI 431 which I often use for high strength anchor rods (from my General Notes):
HIGH STRENGTH ANCHOR RODS SHALL CONFORM AISI 431 AND ASTM A276 HAVING A MIN FY = 95 KSI (655 MPA) AND A UTS = 125 KSI (860 MPA) OR APPD EQ
I've attached an outline of the material (I'm not sure of the source, but you can use it to further search.)
RE: selecting best grade of stainless steel
I could send you a piece of 304 tubing 1.385" od x 0.200" wall that is made to that strength.
I would suggest that you look at using a sacrificial cap that could be replaced. Long term flow will damage any material.
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Plymouth Tube