[MW:6086] Re: HR235 is acceptable in replacement of A36 Material? for ASME SEC VII DIV 1 VESSEL

Since HR 235 is not listed in Table UCS-23 of Section VIII Div. 1, it
may not be used. Only those materials given in Section VIII Div. 1,
with allowable stress values shown in Section II Part D my be used.

I am not sure of the type of pressure vessel you are fabricating, but
if it is an Electrically Heated or Gas Fired Jacketed Steam Kettle
according to Appendix 19, use of SA-36 is also not permitted. In my
experience SA-36 is seldom used for pressure vessels, generally it is
used for structual items, however it is permitted.

One possibility you might have to utilize your HR 235 would be UG-10
MATERIAL IDENTIFIED WITH OR PRODUCED TO A SPECIFICATION NOT PERMITTED
BY THIS DIVISION, AND MATERIAL NOT FULLY IDENTIFIED UG-10(a)(2)

On Jul 22, 10:04 am, asad azmi <azmiasada...@gmail.com> wrote:
> dear all,
>
> please provide me your suggestion for the below issue. one of my friend is
> facing this problem.
>
> The material (HR235) is being used for pressure vessel shell instead of A36.
> Material (A36) is recommended by the designer and mentioned on the drawings.
> Now, the question is that Client has stopped the work and ask for the code
> verification. We have to prove either this material is accepted or rejected
> for pressure vessel by the code ASME VII Div.1.
> In this regard, we conduct the chemical and mechanical testing, results are
> as follows for your reference. Limits are also defined as per ASME II.
> Case-1
> DescriptionTest ResultAccording to MTCRequired according to ASME II
> (SA36)Remarks
> Plate HR235 (8mm)Plate HR235 (8mm)
> Carbon 0.10.150.25 %Max.
> Manganese 0.290.53-Max.
> Silicon 0.0300.190.4 %Max.
> Phosphorous 0.150.270.04 %Max.
> Sulphur 0.020.0140.05 %Max.
> Tensile 359.208469.8400-550 N/mm2
> Tensile 368.060400-550 N/mm2
> Yield Strength 244.077305.3250 N/mm2Min.
> Yield Strength 261.163250 N/mm2Min.
> Elongation 40.04031.7620-23 %Min.
> Elongation 40.80820-23 %Min.
>
> Case-2
> DescriptionTest ResultAccording to MTCRequired according to ASME II
> (SA36)Remarks
> Plate HR235 (5mm)Plate HR235 (5mm)
> Carbon 0.120.150.25 %Max.
> Manganese 0.370.51-Max.
> Silicon 0.0490.280.4 %Max.
> Phosphorous 0.110.0200.04 %Max.
> Sulphur 0.0230.0130.05 %Max.
> Tensile 406.448479400-550 N/mm2
> Tensile 404.089400-550 N/mm2
> Yield Strength 301.249355.3250 N/mm2Min.
> Yield Strength 292.500250 N/mm2Min.
> Elongation 36.5653820-23 %Min.
> Elongation 37.62520-23 %Min.
>
> Someone told me that HR235 material is not acceptable for pressure vessel
> according to the ASME VIII even chemical/mechanical test results are match
> able with the ASME II.
> Is he right?
> Thanks and regards
>
> Asad Azmi

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