Meaning of SA 516 Gr 70

[shady2554]

Good say all,
Please i want to know the meaning or representation of what each terms in ASME material stands for:
SA 516 Gr 70.

SA -
516 -
Gr 70 -

Please i would appreciate any assistance.
Thanks.

"Let he that thinks he is standing beware that he does not fall".

 

[metengr]

SA- means ASME Boiler and Pressure Vessel material specification versus A, which is for ASTM material specification.

516 - this is a number selected for carbon steel pressure vessel plate material.

GR70 - is the minimum strength grade of the carbon steel plate in Ksi units.

 

[jte]

Adding to and clarifying metengr's post a bit:

As noted, the "S" prefix indicates an ASME material spec. In most cases these are identical to ASTM, but certainly not all. For example, SA-106 was not harmonized with A-106 for several years when ASTM made some changes which the ASME found unpalatable.

A indicates that it is a ferrous material. Material specifications for SA materials can be found in Section II Part A. If you had a "SB" material it would indicate that it is the ASME version of a non-ferrous material. Material specifications for SB materials can be found in Section II Part B.

The specification number, in this example "516" is just an identifier. As far as I know it has no technical significance. Perhaps chronological?

The grade identifier can be many different things. For example, SA-285-C the "C" in and of itself is meaningless; one has to read the SA-285 specification to understand what the specific requirements for grade C are. In the case of the 516 series, the grade number correlates to the specified minimum ultimate tensile stress in ksi. So for SA516-70, the specified minimum UTS is 70 ksi while SA516-60 would have a specified minimum UTS of 60 ksi.

 

[JStephen]

SA-516 is a specification in the ASME standards, three or four pages long. It covers several grades, Grades 55, 60, 65, and 70 if I remember right. This is a steel plate specification

In the US, this is one of the most commonly used and commonly available pressure vessel steels. Elsewhere in the world, you may find other materials more commonly used.

 

[blacksmith37]

516 is chronological, it came in about 1974. Sort of replacing A 201 or A212, in the days of "flange" and "firebox" designations.

 

[jte]

SA-515 and SA-516 were both introduced with the 1968 Edition - the same time as Div. 1 and Div. 2.