Tell me Y

From: <phenol19>
Date: Thu Dec 06 2007 - 09:15:00 EST


Hello
Any body can tell me why we write ASTM A312-TP304 ,ASTM A182-F304 and ASTM A420-WP304. why we use this TP, F and WP. and when we go to ASTM A358 we don't use any thing before Gr like ASTM A358-304. why TP, F and WP is used.

Regards

Hafiz Ali Alvi Received on Thu Dec 06 09:15:00 2007

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