Please look at the extract from Table-2 of Specification SA350.
Although the compositional requirements are overlapping, 350 LF1 closer to P1Gr1 material(e.g. SA 516/60, plates), while 350LF2 is closer to P1 Gr 2 material(e.g. SA 516/70, plates).
It’s the compositional differences, lower C and higher Mn which makes major differences in the properties for these grades of forgings.
Also if you look at Table-3, you’ll note there are differences in the required impact test values(Full Size specimen) for both materials.
Hope this will clarify your doubt.
Thank.
P.Goswami.P.Eng, IWE.
Welding&Metallurgical Specialist
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Himan Nikdin
Sent: April 14, 2017 3:44 AM
To: material...@googlegroups.com
Subject: Re: [MW:26410] Differnce between A350 LF1 and LF2
Dear George
I do not disagree with you, but different grain size is achievable by different chemical composition and/or heat treatment, but I can't find any different chemical composition or heat treatment.
Regards,
Himan Nikdin
From: material...@googlegroups.com <material...@googlegroups.com> on behalf of George Dilintas <dili...@gmail.com>
Sent: Wednesday, April 12, 2017 10:44:39 PM
To: Meghanadh K
Subject: Re: [MW:26403] Differnce between A350 LF1 and LF2
Grain Size
2017-04-11 16:59 GMT+03:00 Himan Nikdin <himan....@outlook.com>:
Dear Experts,
Good Day!!
I have query regarding SA350 LF1 and LF2, as you can compare the chemical composition of two grades, there are no difference between two grades;
but you can see the major difference between impact test temperature, what is the reason for this major difference as in SA-350 there is no major heat treatment requirements.
also what is the reason for difference between impact test temperature of LF2 Class 1 and class 2?
thanks indeed if you share your valuable ideas.
Regards,
Himan Nikdin
--
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Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis
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Please look at the extract from Table-2 of Specification SA350.
Although the compositional requirements are overlapping, 350 LF1 closer to P1Gr1 material(e.g. SA 516/60, plates), while 350LF2 is closer to P1 Gr 2 material(e.g. SA 516/70, plates).
It’s the compositional differences, lower C and higher Mn which makes major differences in the properties for these grades of forgings.
Also if you look at Table-3, you’ll note there are differences in the required impact test values(Full Size specimen) for both materials.
Hope this will clarify your doubt.
Thank.
P.Goswami.P.Eng, IWE.
Welding&Metallurgical Specialist
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Himan Nikdin
Sent: April 14, 2017 3:44 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:26410] Differnce between A350 LF1 and LF2
Dear George
I do not disagree with you, but different grain size is achievable by different chemical composition and/or heat treatment, but I can't find any different chemical composition or heat treatment.
Regards,
Himan Nikdin
From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of George Dilintas <dili...@gmail.com>
Sent: Wednesday, April 12, 2017 10:44:39 PM
To: Meghanadh K
Subject: Re: [MW:26403] Differnce between A350 LF1 and LF2
Grain Size
2017-04-11 16:59 GMT+03:00 Himan Nikdin <himan....@outlook.com>:
Dear Experts,
Good Day!!
I have query regarding SA350 LF1 and LF2, as you can compare the chemical composition of two grades, there are no difference between two grades;
but you can see the major difference between impact test temperature, what is the reason for this major difference as in SA-350 there is no major heat treatment requirements.
also what is the reason for difference between impact test temperature of LF2 Class 1 and class 2?
thanks indeed if you share your valuable ideas.
Regards,
Himan Nikdin
--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis
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Dear Pradip
Thank you for reply, but actually my doubt is still remain, as you can see in Table SA-350 there is no difference between LF1 and LF2 grades in
chemical composition range, so I have confused about mechanical
properties (as you mentioned tensile and impact properties), meanwhile as I already stated in my 1st email, this difference in impact test is also in two class of LF2, I want to know the reason for these differences despite
of similar chemical composition.
Regards,
Himan Nikdin
Dear Pradip
Thank you for reply, but actually my doubt is still remain, as you can see in Table SA-350 there is no difference between LF1 and LF2 grades in chemical composition range, so I have confused about mechanical properties (as you mentioned tensile and impact properties), meanwhile as I already stated in my 1st email, this difference in impact test is also in two class of LF2, I want to know the reason for these differences despite of similar chemical composition.
Regards,
Himan Nikdin
From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of PGoswami <pgos...@quickclic.net>
Sent: Saturday, April 15, 2017 1:57:31 AM
Subject: RE: [MW:26414] Difference between A350 LF1 and LF2
Please look at the extract from Table-2 of Specification SA350.
Although the compositional requirements are overlapping, 350 LF1 closer to P1Gr1 material(e.g. SA 516/60, plates), while 350LF2 is closer to P1 Gr 2 material(e.g. SA 516/70, plates).
It’s the compositional differences, lower C and higher Mn which makes major differences in the properties for these grades of forgings.
Also if you look at Table-3, you’ll note there are differences in the required impact test values(Full Size specimen) for both materials.
Hope this will clarify your doubt.
Thank.
P.Goswami.P.Eng, IWE.
Welding&Metallurgical Specialist
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Himan Nikdin
Sent: April 14, 2017 3:44 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:26410] Differnce between A350 LF1 and LF2
Dear George
I do not disagree with you, but different grain size is achievable by different chemical composition and/or heat treatment, but I can't find any different chemical composition or heat treatment.
Regards,
Himan Nikdin
From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> on behalf of George Dilintas <dili...@gmail.com>
Sent: Wednesday, April 12, 2017 10:44:39 PM
To: Meghanadh K
Subject: Re: [MW:26403] Differnce between A350 LF1 and LF2
Grain Size
2017-04-11 16:59 GMT+03:00 Himan Nikdin <himan....@outlook.com>:
Dear Experts,
Good Day!!
I have query regarding SA350 LF1 and LF2, as you can compare the chemical composition of two grades, there are no difference between two grades;
but you can see the major difference between impact test temperature, what is the reason for this major difference as in SA-350 there is no major heat treatment requirements.
also what is the reason for difference between impact test temperature of LF2 Class 1 and class 2?
thanks indeed if you share your valuable ideas.
Regards,
Himan Nikdin
--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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Dr. Georgios Dilintas,
Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis
--
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