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Re: [MW:35733] Testing of heat resistant steel tubes PQR-ASME IX

By Materials & Welding

ASTM A297 Grade HP (Cr 24-28% & Ni 33-37%) is a heat-resistant stainless steel casting alloy commonly used in high-temperature 

applications. ASTM A297 Grade HP (ASME sec II Part A and its UNS number is N08705) does not have a direct, one-to-one equivalent 

in ASME standards and modified slightly for specific applications (example: pressure vessels, piping).


For practical purposes, in ASME codes, Grade HP would be referenced under SA-297 Grade HP for applications like furnace parts, heat 

treatment equipment, or other high-temperature cast components. For a specific purpose like piping, it is referred to as ASME B16.5 -for 

flanges.


C Sridhar.

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On Thu, 24 Jul 2025 at 14:45, 'K Dinesh' via Materials & Welding <materials-welding@googlegroups.com> wrote:
ASTM A297 Gr. HP

Thanks & Regards

K.Dinesh 

Metallurgist


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On Wed, Jul 23, 2025 at 7:51 PM Vishwas Keskar <vvkeskar123@gmail.com> wrote:
What is ASME material grade?



On Wed, 23 Jul 2025 at 11:08 AM, 'Dinesh K' via Materials & Welding <materials-welding@googlegroups.com> wrote:
Hi,

We are going to do PQR testing of heat-resistant steel tubes. Client has given a reference of QW-466.19 for the bend test, which i could not find in the latest ASME IX. 

Can anyone please help

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