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GKB
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304LN Grade in Stainless Steel

08/26/2013 1:28 PM

In ASTM A312 I saw 304, 304L and 304LN grades where N stands for nitrogen . . What benifit you get for using Nitrogen in L grade steel
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1tech
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#1

Re: 304LN grade in Stainless steel

08/26/2013 2:13 PM

ERRR!

You might have tried Google for this one. I Used your own words in the Search and came up with this.

quote from the following article.

http://www.keytometals.com/page.aspx?ID=CheckArticle&site=kts&LN=EN&NM=202

All steels contain some nitrogen which is effective in improving the mechanical and corrosion properties of steels if it remains in solid solution or precipitates as very fine and coherent nitrides. When nitrogen is added to austenitic steels it can simultaneously improve fatigue life, strength, work hardening rate, wear and localized corrosion resistance.
High nitrogen martensitic stainless steels show improved resistance to localized corrosion (pitting, crevice and intergranular corrosion) over their carbon containing counterparts. Because of this, the high nitrogen steels are being considered a new promising class of engineering materials.

Stainless steel also contains Nickle!!!

Pitting Resistance Equivalent Number (PREN) is a measurement of the corrosion resistance of stainless steel containing nickel. Exact testing procedures are specified in the ASTM G48 standard.[1] In general: the higher PREN-value is, the more corrosion resistant the steel is.

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Tornado
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#2
In reply to #1

Re: 304LN grade in Stainless steel

08/26/2013 7:31 PM

WTH is "nickle"?

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dvmdsc
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#3
In reply to #2

Re: 304LN grade in Stainless steel

08/26/2013 8:04 PM

Ni

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1tech
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#4
In reply to #2

Re: 304LN grade in Stainless steel

08/26/2013 8:39 PM

Got a nickle in my pocket Nex to me kees. Good catch! I should use spell check more often! Nickel, Ni, atomic # 28

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#5
In reply to #4

Re: 304LN grade in Stainless steel

08/27/2013 8:18 AM

who is "Nex" and what is "kees"???

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1tech
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#9
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Re: 304LN grade in Stainless steel

08/27/2013 3:16 PM

Really?

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#11
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Re: 304LN grade in Stainless steel

09/02/2013 2:39 AM

Sure!

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Janissaries
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#6
In reply to #1

Re: 304LN grade in Stainless steel

08/27/2013 10:29 AM

Yep, nickle is the cost driver in stainless steel.

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#7
In reply to #6

Re: 304LN grade in Stainless steel

08/27/2013 10:54 AM

What about chromium?

And what's this "nickle", anyway?

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Janissaries
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#8
In reply to #7

Re: 304LN grade in Stainless steel

08/27/2013 11:15 AM

Nickel.

Nickel is what the metal sales people look at when predicting the cost of stainless steel to going up or down.

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Doorman
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#10

Re: 304LN Grade in Stainless Steel

08/27/2013 6:02 PM

304LN Datasheet

The nitrogen provides improved yield and tensile strength over 304L.

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