"-1" designate that the electrode meets the requirement of improved toughness or impact.
"HZ" is using to designate the hydrogen diffusion. ie 'Z' ml of Hydrogen per 100g of deposited metal, where Z=4,8 or 16 (refer ASME Sec II part C SFA 5.1 or AWS A5.1)
E7018-1 have same usability and weld metal composition as E7018, except the manganese content set high range and these electrodes are intended for welds requiring a lower transition temperature than is normally available from E7018 electrodes.
E7018 avg min impact 27J @ -30DegC
E7018-1 avg min impact 27J @ -45DegC
Regards,
Aneesh
KSA
On Sun, 07 Nov 2010 08:13:27 , Adi wrote
Hi everybody
What is meaning of " -1 " in electrode E7018-1
Is it indicate hydrogen diffusion
What is the difference between E7018 & E7018-1, only impact test or
material composition also
Reg
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