Square Kelly and Hexagonal Kelly are comforing to API Spec 7 and made from AISI 4145H alloy steel.
Square Kelly and Hexagonal Kelly are comforing to API Spec 7 and made from AISI 4145H alloy steel. It is formed by hot forged and fully heat- treated, and also by intermediate frequency induction heat treatment or 20m horizontal optical resistance furnace, which can provide high physical properties in full length. All threads are cold rolled copperized, phosphated.
If you want to commnicate with me for the Square Kelly and Hexagonal Kelly,please send enquiry to me or contact me on the trade manager.My trade manager id is: cn200852287
Thanks and best regards,
Mr Albion
Sales Manager
Dongying Haixin Petroleum Equipment Co.,Ltd
square kelly and hexagonal kelly
