ASME sa516 gr70

Date 06-11-2009 23:54 Edited 06-12-2009 00:13

SA516-70 has no specified nickel addition. There may be some trace amount that is limited by SA-20.

SA20 limits max. nickel to 0.40 wt% in the heat analysis or 0.43 wt% in a product analysis.

By michael kniolek (***)

Date 06-12-2009 00:03

and what about them? Is it a requirment?
Should SA-20 be adhered to as well as the product spec?
i thought that sa-20 covered a large range of general requirments?
MDK

By MBSims

Date 06-12-2009 00:15

SA20 does cover a large range of general requirements, one of which is the limits on unspecified elements. SA20 is referenced in SA516 and is a requirement to be met by any spec that references it.

By michael kniolek (***)

Date 06-12-2009 00:40

so if asked that question on a test and i gave the product analysis and the heat analysis from sa20 for nickle would you mark it wrong?

By MBSims

Date 06-12-2009 00:51

Depends on how the question was worded. If it asked what amount of nickel is "allowed" by SA516 for Grade 70 material, I would mark it correct. If the question is what amount of nickel is "specified" by SA516 for Grade 70, the answer is "none".