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[MW:28463] Re: Difference between the electrode E8018 B-8 & E8015 B-8

By Materials & Welding
E8018-B8 and E8015-B8 both are basic low alloy steel electrode having same chemical composition of undiluted weld metal & mechanical properties and being used for the welding of 7 to 9 Cr-Mo type steel. You can also use it to weld 5Cr-1/2Mo to 7 to 9 Cr-Mo dissimilar weld joint.

The min difference is in the coating & electrical characteristics. E8015-B8 coating is having sodium silicate binding and hence can be used only for DCEP polarity.
While E8018-B8 having potassium silicate binding in the coating which enable to be used on DCEP and AC polarity, with added iron powder they enable better conductivity for current flow via the electrode coating & hence higher weld deposition.
 
E8018-B8 i having better arc striking & stabling quality than the E8015-B8 due to coating characteristics. E8015-B8 is having improved characteristics for the pipe welding compare to the other one involved in this discussion.


Thanks & regards
Sandeep Kumar


On Saturday, January 5, 2013 at 8:50:29 AM UTC+3, Biplab Pal wrote:
Dear Experts,

Can any body differentiate between the electrodes E8018 B-8 & E8015 B-8, and the difference of applicable areas.

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Thanks & Regards
Biplab Pal
Welding Inspector
E-mail:   bipla...@gmail.com
 
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