Standard Names For Stainless Steel
Standard Names For Stainless Steel
(OP)
Hi everybody
Can anybody tell me if there is a standard on how to call a stainless steel?
For example what is the difference if I call 316 SS or UNS S31600?
Can anybody tell me if there is a standard on how to call a stainless steel?
For example what is the difference if I call 316 SS or UNS S31600?





RE: Standard Names For Stainless Steel
The UNS S31600 material has to conform to a definite set of parameters. The main one being the limits on chemistry.
316 SS can be any material that conforms to a generally accepted norm for the chemistry of a material called 316 SS. The chemistry is not controlled as it would be in the UNS S31600.
If there is any criticality in the end use of the material it is always best to call out the material under some
specification or standard.
RE: Standard Names For Stainless Steel
I prefer UNS numbers (along with a spec). Their chemistries never change and they are listed in most specification. There is also a UNS for every alloy, even ones that don't have accepted common names. It is a way to help get the material that you expect.
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RE: Standard Names For Stainless Steel
There is no easy path to understanding and applying the specifications and standards.
RE: Standard Names For Stainless Steel
If you want a "generic" term that's easier to read an write (assuming you call out or reference the specifics, if necessary), I've seen:both of the following
SS 316,
CRES 316 [for Corrosion REsistent Steel]
RE: Standard Names For Stainless Steel
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RE: Standard Names For Stainless Steel
Nice pdf, any equiv's for Europe
Kevin Hammond
Mechanical Design Engineer
Derbyshire, UK
RE: Standard Names For Stainless Steel
I was out for couple days and today I saw how many replies I've got
I'm a little bit confused now. I've read on the internet the following:
"Instructions: The UNS number (short for "Unified Numbering System for Metals and Alloys") is a systematic scheme in which each metal is designated by a letter followed by five numbers. It is a composition-based system of commercial materials and does not guarantee any performance specifications or exact composition with impurity limits. Other nomenclature systems have been incorporated into the UNS numbering system to minimize confusion. For example, Aluminum 6061 (AA6061) becomes UNS A96061." (www.matweb.com/search/searchUNS.asp)
So if this is stated like that how do I know what I'm getting?
RE: Standard Names For Stainless Steel
You must also specify a product specification (ASTM or EN or what ever) that has the other property requirements for you product.
As an example, if you asked for 316 bar I could send you any chemistry that is sort of close to 316, but with no firm limits, and any mechanical properties (hot finished, cold finished, and so on).
Now, if you said ASTM A276 S31603 you would have defined the chemistry, mechanical properties, and testing for you bar.
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RE: Standard Names For Stainless Steel
Thank you much!
RE: Standard Names For Stainless Steel
I'm looking to source the following:-
Cold drawn SEAMLESS stainless tube 1) 1/2" O.D. x 16 SWG., and 2) 5/16" O.D. x greatest wall thickness available, for rigidity. This is for a low pressure hydraulic application (30 bar/450 psi)Water is the hydraulic medium. The larger tube is to be the cylinder, and the smaller to be the piston rod. The larger tube bore and external surface finish to be within the range 16 to 6 microinch, the smaller tube external surface to be within this range. Alternatively, mill finish should be close enough for the required finish to be readily achievable. "O" ring seals are to be run on these surfaces. Piston rod and cylinder will each be around 18" long, so suggestions as to how the required bore can be finished, if necessary, would be most welcome.
I used to finish long injection moulder nozzles with abrasive tape on a brass rod, but they were high value items, and I have to get these tubes down to a price. ASTM 269 316L has been suggested. One tube will have attachments silver brazed each end, the other will be flared one end, and have an attachment silver brazed at the other.
Any help in regard to sourcing would be appreciated, even if the source is U.S. based.
RE: Standard Names For Stainless Steel
Want to talk?
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RE: Standard Names For Stainless Steel
Any help would be appreciated.
Bobble.
RE: Standard Names For Stainless Steel
What exact ID size and tolerance do you need on the 1/2" tube?
ed
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RE: Standard Names For Stainless Steel