Temperature grades definitions

[INSP79]

In ASTM or equivalent std. i see classification acc. To work temp. ( hi , low , elevated , room , moderated ) , so i want to know witch temp. Range specify these grades . Thank you

 

There are thousands of ASTM standards.
Give a specific example.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[EdStainless]

If it matters then it is in the scope.
If they are using the term generically then you have to look at the applications.
For example power plant feedwater heaters can not operate higher than the main steam temp.
The limits envisioned in ASTM are nothing like the limits in the ASME stress tables.
They are general guidance and not design rules.
Though when a spec says 'general service', it really means 'the lowest quality generally accepted for non-critical application'.

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P.E. Metallurgy, Plymouth Tube

 

[INSP79]

Witch standard specify range of terms ‘lo temp’ or ‘ elevated temp. ‘ or ‘ hi temp. ‘
For example
Low temp. From -50 to +20 °c

 

[mk3223]

Witch standard specify range of terms ‘lo temp’ or ‘ elevated temp. ‘ or ‘ hi temp. ‘
For example Low temp. From -50 to +20 °c

The words of 'high', 'low', 'elevated', or 'room' are the common terms used to describe the personal feeling to the temperature around the matter. The one specific temperature, said 20 Deg-C, may be defined as a 'low' temperature for one material, but could be the 'high' temperature for the other. Similarily, the 'room' temperature of 20 Deg-C at one location can be the 'lowest' temperature, but the 'highest' at the other.

Instead, the Standards may define the specific temperatures if needed, such as:
- the material phase transformation temperature
- the material heat treatment temperature
- the chemical reaction temperature