Allowable Stresses for HK 40

[Maneng]

I am looking for Allowable Stress Values (below and in rupture / creep range) for A 351 HK 40 castings used for supports in fired heaters.

Would appreciate if you can provide some reference.

Thanks

 

[metengr]

Maneng;
You are on your own for determining allowable stress values for this material. ASME B&PV Code does not endorse this material for pressure retaining service. In your case as supports, you will need to run your own calcs on this material. You can perform an Internet search to obtain properties and assign your own stress values for use.

http://www.kubotametal.com/alloys/heat_resistant/HK-40.pdf

 

[MJCronin]

Man...

Can you find out the material that was used for the fired heater itself ? Is the fired-heater vendor still in business ?

To which code/standard/guideline was the the unit built ?

Or, more likely case, have you been handed a mess where all of the records were thrown away by the previous owner of the facility...?

-MJC

 

[ijzer]

You can find the allowable stresses in API 530

 

[Maneng]

metengr, MJCronin & ijezer,

Many thanks for your response.
I had done some survey on internet prior to posting this question. API 530 does provide allowable stresses above 1400F. I am looking for the allowable stress values from 70F to 1400F.

If you are aware of the source where I can get this info, please let me know.

Regards,

 

[ijzer]

You can ask e.g. Kubota ,Doncasters or Manoir for this data(Usualy HK40 is not used below 760 °C because it is brittle at lower tempratures)