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[MW:16917] RE: 16910] Feasibility of repair welding for 4145h steel

By Materials & Welding
Hi Ali,
 
These steels will have very high C.E. If you calculate as per the common IIW formula , the CE value would be > 0.55 or more. Generally weld repairs would not be advisable for drilling tools, due to safety and other serious damages to costly equipments. You may seek the opinion of the tool manufacturers and then decide.
 
Should weld repair be the  last resort, you may contact UTP (from my experience I've found them as a good resource for many "uncommon "  weld repair products).
 
Thanks.
 
 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Ali Momeni
Sent: Thursday, February 28, 2013 4:39 PM
To: materials-welding@googlegroups.com
Subject: [MW:16910] Feasibility of repair welding for 4145h steel

All Dear
You know
"AISI 4145H is a chromium molybdenum quality alloy steel specification. As a high tensile steel grade AISI 4145H is primarily supplied in the hardened and tempered 
condition to 30-36HRc range to AISI 4145H modified. With a slightly higher carbon content AISI 4145H is similar to AISI 4140 in that it offers good ductility, shock  resisting characteristics combined with resistance to wear. and used in Well Drilling Tools"
and question is
"How can we evaluate the feasibility of repair welding for 4145H steel so that the properties needed to meet?"

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