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Active Contributor

Join Date: Jan 2009
Posts: 19

Difference between A105 and A105N

07/30/2009 11:11 PM

Guys I need your on this one,I know that A105(normalized) and A105N(non normalized).

But between that what other difference do they have? Which is better harder to sustain higher pressure? Thanks for you help in advance.

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Guru

Join Date: Mar 2007
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#1

Re: Difference between A105 and A105N

07/30/2009 11:52 PM
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Guru
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#2

Re: Difference between A105 and A105N

07/30/2009 11:56 PM

My understanding is that A105 as used for pressure containing parts should always be normalised and with maximum C = 0,25% (I am not a metallurgist).

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Guru

Join Date: Mar 2007
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Good Answers: 105
#3

Re: Difference between A105 and A105N

07/31/2009 2:51 AM

ASTM A 105 is "Standard Specification for Carbon Steel Forgings for Piping Components", delivered in the untreated, annealed or normalised condition.

Heat treatment according to ASTM A105 is not mandatory except for Standard Flanges/ special flanges above Class 300 (ANSI B16.5) or of unknown working pressure-temperature rating/ condition.

Heat treatment if required must be specified and may be Annealing, Normalising, Normalising and tempering or Quenching and tempering.

This is the gist (exact wordings and clauses may be checked in the ASTM standard)

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Guru
Brazil - Member - New Member Engineering Fields - Mechanical Engineering - New Member Hobbies - RC Aircraft - New Member Hobbies - Target Shooting - New Member Hobbies - Automotive Performance - Hey there... interested in exchanging information about car performance? Hobbies - DIY Welding - New Member

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#4

Re: Difference between A105 and A105N

08/03/2009 5:54 PM

The answer provided fills your question. Regarding what is better to sustain high pressure, well, it depends. Material strengh is always a compromise between resistance and toughness. After process high-stresses in the material may lead even to a higher mechanical resistance, but will reduce toughness and material will be prone to cracking or catrastofic failure. Other factors that influence in choice is machinability, weldability, and so on. As always in materials, final answer depends on your application.

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#5

Re: Difference between A105 and A105N

08/28/2009 3:11 AM

Are you sure that A105 is normalized and A105N is non-normalized material?

As short as i know, the letter "N" indicates "Normalized". I use it in my SA516 Grade 70N (which means the SA 516 Grade 70 is to be normalized).

Please correct me if i am wrong for this case. Thanks.

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Anonymous Poster
#6
In reply to #5

Re: Difference between A105 and A105N

10/20/2010 2:55 AM

N stands for Normalised. I am sure about this

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