shall we refer ASME sec VIII div-1 for soaking hours of normalising & tempering process-reg

[Sankaran Sp]

Dear friends,

We used to get A217 - WC6 & A217 -WC9 casting from foundry with  normalising & tempering conditions, these details are given the MTC of the product. while checking the soaking hours for normalising & tempering process, they used to follow 4 hours for all 100 to 200 thickness jobs, when as asked to maintain 5 hours for 125mm, 6 hours for 150mm & 8 hours for 200mm thickness, they refused to increase the soaking hours from 4 hours and asking the reference standard for soaking hours, in this situation shall we refer ASME sec VIII div-1 for soaking hours w.r.to P nos? kindly help me in this regards.      .    

Regards,

Sankaran.SP

Coimbatore, India. 

[Karthik]

Hi,

For materials, we have to refer ASME Sec.II Part-A , SA217 and SA703 - S22.

S22. Heat Treatment

S22.1 Test specimens shall be heat treated together

with the castings they represent. Heat-treated specimens

shall be tested and shall meet the tensile and impact properties

specified.

S22.2 The remaining test specimens from Supplementary

Requirement S22.1 representing the casting shall be

treated thermally after the final (foundry) heat treatment

to simulate heat treatments below the critical temperature

that the casting may receive during fabrication, and then

tested for mechanical properties. Time, temperature, and

cooling rate shall be as stated in the order. In the case of

postweld heat-treatment, the total time at temperature or

temperatures for the test material shall be at least 80% of

the total time at temperature or temperatures during actual

postweld heat-treatment of the fabrication of which the

casting or castings are a part. The total time at temperature

or temperatures for the test material may be performed in

a single cycle. When this Supplementary Requirement is

specified, the welding qualification test metal must be processed

in the same manner.

Thanks& Regards,

(Karthik)
Karthikeyan.S
M: +66-892512282

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[Shahil Saini]

hello sankaran 

For the above mentioned casting material, refer to the images attached. And In ASME Sec II Part-A, SA217 & SA703 there is not any mentioned detail that for the above materials you can use ASME Sec VIII Div-1, But As per P-No. and G-No. you can refer UCS-56, in that Table UCS-56-3 and UCS-56-4 (please kindly read the general notes).

Thanks and regards

Shahil Saini

PGET-Welding

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[Shahil Saini]

Cont'd with my above mail

[Prakash Hegde]

Hi!

For Normalising you can not refer SecIII div 1 as it is referred to Pwht which is below AC1 temp

While as normalsing is carried above AC3 which depends upon component chemistry And final req mech 

properties to be achieved with metallographic requirement This is being established by heat treatment trials by product  mfgr

That is why mafgr is reluctant to change HT cycle

In such.case one has to accept recommended  HT cycle

Regards

Hegde

Sent from Yahoo Mail on Android

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[George Dilintas]

Yes you could refer to VIII-1

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