Yield Strength in ASTM Norms

[Clement-Corri]

Hi there,

I'm starting to study ASME/ASTM standards. Usually, with EN standards, I can easily find the yield strength at temperature. There, I search yield strength at 700°C for N06617 (Inconnel 617) but if I read ASTM B564, I found only 276Mpa for hot finished forging. Do you know how to find yield strength at temperature for ASTM materials ?

Regards.

 

[Gr8blu]

ASME standards establish the dimensions and tolerances for most commonly used items with respect to each material class
ASTM standards establish quality for materials which are to be used in products which are described in ASME.
EN standards are consensus standards - meaning all interested parties get to have a say in the standards development process. It also means that more often than not, it caters to the minimum technical and safety criteria OF ALL THE PARTIES. And it provides a "model specification" against which a market can trade.

Maybe most importantly, the EN standards must be transposed into a corresponding national standard in all EU member states. This guarantees that a manufacturer has easier access to the market of all these European countries when applying European Standards. Member countries must also withdraw any conflicting national standard: the EN supersedes any national standard.

Now think about your specific query. Did the EN team go out and test multiple articles at an infinite range of temperatures to determine exact physical properties? Or did they choose a few (commonly reachable) data points and produce an interpolation for points not actually within the testing criteria? What do you think the ASTM and ASME gang did? How likely was it that they picked the same points as "test" points?

Converting energy to motion for more than half a century

 

[SnTMan]

Clement-Corri allowables and other properties of ASME materials at elevated temperatures are defined per the various Code Sections / Divisions. These Codes generally refer to properties listed in ASME Sec II, Part D, in numerous Tables.

Refer to same if you can get a copy.

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[DriveMeNuts]

Are you looking at Table 1B and Y-1 in ASME II Part D? If you word search N06617 you will find multiple alloys with Temperature-Yield charts.
You won't find the yield strength as at 700°C as the material is in the time dependent range at this temperature.
The allowable stress numbers in Italics are for 100k hours of creep. See Mandatory appendix 1 for description of how it is calculated. The short term yield stress and other underlying variables come from other sources.
From Wikipedia it looks like it was only accepted by ASME in 2021, for forgings only by the looks of it, so will have limited references in ASME ASTM specs.
The following is the best I could find:
Link
It provides a Yield graph.
It looks like a Proprietary material which is yet to be adopted by many national codes. Perhaps sales brochures are all you're gonna get. But you really need something like API 530, with Stress curves.

 

[Clement-Corri]

Hi all,

Thank you for answers, I will check in ASME BPVC.

DriveMeNuts, thank you for additional informations, you're right, it seems this material is new. I will certainkly propose an other material to my customer.