Rockwell Hardness values for ASTM A563 Gr A

[kpm21443]

I was looking the STD A563 Gr A & found that Rockwell Hardness value is mentioned as B68 MIN & C32 MAX. I was checking a test certificate & it shows the result for hardness as 90-92 HRB. Please advise how to compare the values in the standard & the results in the test certificate.

 

[EdStainless]

It is withing the spec range, so what is the question?
Rockwell ranges don't read above 100, and RB100 is roughly 20RC.

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P.E. Metallurgy, Plymouth Tube

 

[WKTaylor]

kpm21443

May find the following specs useful.

ASTM E140 Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness

SAE J417 Hardness Tests and Hardness Number Conversions

Regards, Wil Taylor

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