Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

301 Full Hard Stainless Steel Question 2

Status
Not open for further replies.

011235813

Mechanical
Joined
Oct 15, 2009
Messages
1
Location
US
I've been getting some 301 Full Hard in from my supplier. The data sheet calls out a minimum Rockwell Hardness of C41, however my in-house testing shows a Knoop Hardness of 550, this translates in to a Rockwell of ~51. Quite a bit more than the minimum spec (Tensile strength of ~1790Mpa vs 1276Mpa), I'm wondering if anyone has experience with 301 full hard... would you say it is normal to see hardness that far above the minimum or can I expect to one day get some material in that will have a much lower hardness?

Thanks.
 
301 full hard can be all over the board as long as it's above the minimum. This item is an outlet for material which has been disqualified for more narrow specs, such as 3/4 hard which turned out too hard or heavily cold rolled 301 which missed gauge. Thus, this item is unfortunately an outlet for mill rejects. Therefore unless it's made to your order of restrictive specifications, don't expect consistency.

Michael McGuire
 
If you want (need) consistency then order to a specified strength range.
A666 has no hardness listed at all. Tensile strength, yield, elongation, and bend testing are what are used to specify the degree of cold work.
If your stuff meets the elongation and bend test requirements then it is within spec.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top