Difference between E-7018 & E-7018-1

[arcpro]

What is the difference between E-7018 & E-7018-1? We are using both at our site.

[ashfaqanwer]

E7018-1 has the same usability and weld metal composition as E7018 electrodes, except that the manganese content is set at the high end of the range. They are intended for welds requiring a lower transition temperature. Normally the welding of killed carbon steel to be operated at lower temperatures is done using E-7018-1.

E7018-1 electrodes are impact tested at -46 deg C (required energy 20 J - single value)

But normally this is not intended to be used below a design temperature of -35 deg C.

[arcpro]

Thanks Ashfaq for the clarity.