Skip to main content

Re: [MW:30008] Requirement of double Normalizing of SA-516 Gr.70

By Materials & Welding
Jayesh

I do agree with Prakash UTS will be affected on negative side hence your base material should have greater UTS during procurement.

Further to that

As you mentioned
" so during cold forming vendor need one intermediate normalizing. and as per client requirement one more normalizing performed after complete dished end forming. So, total 2 time normalizing have to perform."

It is interesting to understand

1.  what do you mean by "intermediate normalizing" ?
2.  When the dish is cold formed why is the vendor requiring normalizing.  Is your designer asking for same.  Can't both vendor and client requirements be satisfied in one normalizing


Answer to your other questions is

(1) During plate order i have to take 2 normalizing cycle simulation ? Yes Or No? With Reason
You will have to test the sample to meet UCS 85 requirement after 2 cycles of normalizing

(2) May I take benefit of Clause UCS-85 (i) of ASME sec-8 Div.1?
You will have to test the sample to meet UCS 85 requirement after 2 cycles of normalizing because you may not be able to maintain the same cycle on the dish as that of the plate manufacturer

(3) Is same clause applicable for welding?
PQR shall be qualified with 2 normalizing cycles as heat treatment condition.  Since it is normalizing thickness restrictions will not apply.

(4) And If i will perform double normalizing then I have to simply double the normalizing time or 2 separate normalizing i have to perform?
Either way is acceptable there is no restriction as such.

(5) What will be effect on weld and base material after 2 time Normalizing?
Material and weld properties will change (reduce)

Regards,
 
Prashant P Rane


On Fri, Aug 30, 2019 at 10:59 AM 'Prakash Hegde' via Materials & Welding <materials-welding@googlegroups.com> wrote:
Hi!
With multiple normalising.UTS gets deteoriates
Accordingly  ddelivery condition.of.plate.you req UTS on higher side than min requirement
Ii) Generaly for highet.thick weld.seam multiple Normalising.ll.reduce UTS as such Normalising criteria.is not.addressed in.Sec IX.or.Div 1 of ASME
THATS why most of the designer recomend Crown.n Petal.for higher thk.Dends
Regards
Hegde

Sent from Yahoo Mail on Android

On Fri, 30 Aug 2019 at 11:51, Jayesh Parekh
In our recent project i encounter one problem.

Material Grade : SA-516 Gr.70 Supply condition : Normalized
Dished end : Ellipsodial
Thickness : 45 mm
Forming process : Cold forming
Dished end have one cordal seam
Impact required at : -46 deg. C
so during cold forming vendor need one intermediate normalizing. and as per client requirement one more normalizing performed after complete dished end forming. So, total 2 time normalizing have to perform.

So, my question is ; 
(1) During plate order i have to take 2 normalizing cycle simulation ? Yes Or No? With Reason
(2) May I take benefit of Clause UCS-85 (i) of ASME sec-8 Div.1?
(3) Is same clause applicable for welding?
(4) And If i will perform double normalizing then I have to simply double the normalizing time or 2 separate normalizing i have to perform?
(5) What will be effect on weld and base material after 2 time Normalizing?
(6) if any one encountered such issues . please help to solve 

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/f9744a58-4c34-4c96-93f8-ff304e519db5%40googlegroups.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/177254843.162832.1567147604899%40mail.yahoo.com.

--
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/CAAkMc%3D6MZLP-bZTt6iBUUfqPU0X5OBH-QEAJeksfOm%3Dr%3D1ZM_g%40mail.gmail.com.

Comments

Post a Comment

Popular posts from this blog

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

By Materials & Welding
Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change.   Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...
Post a Comment
Read more

Materails FAQs

By Materials & Welding
Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...
21 comments
Read more

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

By Materials & Welding
Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...
Post a Comment
Read more