Why there is no grading for ASTM A105? 1

[McDermott1711]

Why there is no grading for ASTM A105?
Thanks in advance.

 

[metengr]

Because if you review the material specification, you will see a wide range of carbon content is necessary for small and large carbon steel forgings and in applications from ambient to elevated temperature service.

 

[McDermott1711]

Thanks metengr for your reply. If i got you, it is type of manufacturing (forging) that prevents it from grading (as it is in, say, A106). Am I right?

 

[metengr]

Yes, that is part of it but also mechanical properties, and end use of the product form.

 

[McDermott1711]

If forging is part of it, why ASTM A694 (Standard Specification for Carbon and Alloy Steel Forgings for Pipe Flanges, Fittings, Valves, and Parts for High-Pressure Transmission Service)has nine grades (F42 F46 F48 F50 F52 F56 F60 F65 F70)?

 

[weldstan]

These grades were provided to match API 5L-X42, X52, X60, etc pipe for gas/oil transmission systems.
A-105 was primarily created for A-106, A53 pipe systems.