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Alloy Type:

E9018-M is an electrode used for welding higher strength steels when tensile strength in excess of 90 ksi is required.  The coating on this electrode is specially formulated to resist moisture pick-up in conditions of high heat and humidity.  It’s resistance to moisture reabsorption also helps prevent hydrogen cracking and aids in elimination of starting porosity.


Typical Applications:   joining HY-90, HY-80, T-1 and other high tensile steels


AWS Class: E9018-M H4R Certification:    AWS A5.5/A5.5M:2006
Alloy:  E9018-M ASME SFA A5.5


Welding Position:    F, V, OH, H Current:



Tensile Strength, kpsi: 90
Yield Strength, kpsi: 78-90*
Elongation %: 24


* For 3/32” electrodes, the upper value for the yield strength may be 5 kpsi higher


Typical Wire Chemistry as per AWS A5.5 (single values are maximum)

C Mn Si P S Ni Cr Mo V
0.10 0.60-1.25 0.80 0.030 0.030 1.40-1.80 0.15 0.35 0.05


Typical Welding Parameters
Diameter Process Amps
in (mm)
 3/32  (2.4) SMAW 70-110
 1/8  (3.2) SMAW 90-160
 5/32  (4.0) SMAW 130-210
 3/16  (4.8) SMAW 180-300



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