Thank you for the comment, yes you are right ASTM percentage is a maximum of 0.4% whereas NACE is 1% i think this aspect is well covered.
As for hardness i saw a number of MTR's for A106GrB material and all show tensile strength of about 490MPA with corresponds to a hardness level well below...
Please can somebody let me know if a pipe produced under ASTM A106 GrB is NACE compliant? i see NACE wants materials to have less then 1% nickel value whereas ASTM allows 0.4% and the max tensile strength is somewhere around 510MPA which corresponds to hardness well below HRC22 as allowed by...