SFA 5.18 Carbon Steel Electrodes and Rods for Gas Shielded Arc Welding
Solid Electrodes & Rods of SFA 5.18
Solid electrodes or rods consist of the following as detailed in SFA 5.18 Table 1
ER70S-2
ER70S-3
ER70S-4
ER70S-6
ER70S-6A (see supplemental designator for ASME A-No. 1)
ER70S-7
ER70S-8
ER70S-G
Composite Metal Cored Electrodes of SFA 5.18
Metal Cored electrodes consist of the following as detailed in SFA 5.18 Table 2
E70C-3X
E70C-6X
E70C-8X
E70C-12X
E70C-GX
Supplemental Designators
“H” Diffusible Hydrogen
“OE H/L” Shielding Gas for GMAW Electrodes
“A” ASME A-No. 1
“A” is an optional designator of the 5.18 Classification used for “S-6” or ER70S-6 classification, which indicates that the rod meets the additional manganese and silicon requirements for ASME A-No. 1.
A-No. 1 limits require a maximum of manganese limit of 1.60%, and a maximum silicon limit of 1.0%
So a filler metal rod labeled as ER70S-6A indicates conformance to ASME A-No. 1 and can be used on PQR’s and WPS’s in lieu of notes specifying limitations of manganese and silicon.
“N” Nuclear Applications
“N” is an optional designator of the 5.18 Classification which indicates that the electrode has met requirements to be used in nuclear applications.
