AWS E7018-1 H4R

FEATURES&BENEFITS

• Excellent starts and restarts
• Extra low moisture 
• Stable arc 
• Low spatter • Great for tacking, increases productivity

• Prevents starting porosity

• Easy to control, operates well in all positions

• Easy clean-up

TYPE OF CURRENT

Welding Positions:

Category

AWS E7018-1 H4R Low Alloy Electrodes Tianjin, China

 is a high deposition rate iron powder electrode designed for DC reverse polarity or AC operation in all positions. It provides excellent operator appeal with a quiet arc, minimal spatter and good restrike capabilities. It offers good slag removal and an easily controlled weld puddle that allows outstanding ease when welding in either the vertical or overhead position.

Industries

Excellent for out-of-position tacking as well as for welding low alloy structural, steel structures and field erections, and offshore rigs and power plants.

Applications

Single and multiple pass, DCEP, AC, All Position

• Out-of-position tacking

• Low alloy structurals

• Steel structures
• Field erections

• Offshore rigs

• Power plants

RECONDITIONING

STORAGE

TYPICAL WELD PROPERTIES* (Chem Pad)

TYPICAL DIFFUSIBLE HYDROGEN

Reduce optimum amperage by 15% when welding out of position.
*Calculated using optimum parameters and DCEP polarity. Allowance made for 2” stub loss
• Maintaining a proper welding procedure - including pre-heat and interpass temperatures - may be critical
depending on the type and thickness of steel being welded.

CONFORMANCES AND APPROVALS

• AWS A5.1, Class E7018-1 H4R
• ASME SFA5.1, E7018-1 H4R
• ABS

ARC LENGTH

Very short (less than 1/2 the diameter of the electrode)

FLAT

Angle electrode 10-15°F from 90°F

VERTICAL-UP

Use weaving technique

VERTICAL-DOWN

Not recommended

OVERHEAD

Use slight weaving motion within puddle

Direct Current Electrode Positive (DCEP) or AC

Oven controlled at 250°F to 300°F to ensure a low hydrogen weld deposit

If electrode has been exposed to the atmosphere for an extended period of time, place in 250°F oven and slowly increase temperature to 600°F; bake at 600°F for 1 hour

TYPICAL CHARPY V-NOTCH IMPACT VALUES* (As Welded)

Angle electrode slightly toward top plate

HORIZONTAL

TYPICAL MECHANICAL PROPERTIES* (As Welded)

AVAILABLE DIAMETERS AND PACKAGES