HARDNESS LIMIT

[Ankit Gandhi]

Dear sir,

As per Hardness procedure we are often seeing that for P1 material 200 BHN

P4 material 220 or 230 upper limit, but in no case we i have seen lower limit for hardness.

Normally after PWHT Forging material hardness is going down distinctly may be 130-140 BHN.

So Please let us know what is lower limit for hardness and what is reference document for that?

Regards.

Ankit Gandhi.

[Dharmesh Mistry]

lower limit shall be derived from ASTM A370 with comparison of minimum
tensile strength.

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Thanks, & With Best Regards,



Dharmesh MISTRY

+91 9820735814

[Ankit Gandhi]

Dear Mr. Dharmesh,

Thanks for your reply but table 2 of SA 370 is approximate value and we are not knowing actual tensile strength of material after pwht.

Regards,

Ankit Gandhi.