AWS E9018-M H4R

Description

Outstanding welding electrode for welding higher strength steels with tensile strength in excess of 90,000 psi. Coating is specifically formulated to resist moisture pick-up under conditions of high heat and humidity. Electrode offers resistance to moisture reabsorption which helps prevent hydrogen cracking and aids in elimination of starting porosity.

Applications

Welding Positions:

Single and multiple pass, DCEP, AC

• High tensile steels

Category

Low Alloy Electrodes

Industries

Used for joining HY-90, HY-80, T-1 and other high tensile steels.

FEATURES

●Excellent arc characteristics
●Low spatter level
●Quick and easy slag removal
●Low moisture reabsorption
●Low smoke level
●Low hydrogen, less than 4 m/100 g

BENEFITS

●Stable, easy to control arc
●Improves weld bead appearance, higher deposition
●Reduces clean-up time
●Prevents starting porosity
●Welder safety and comfort
●Resistant to hydrogen-induced cracking

TYPE OF CURRENT

Direct Current Electrode Positive (DCEP) or AC

RECOMMENDED WELDING TECHNIQUES

GENERAL: Electrode positive, work negative (DCEP) or AC
ARC LENGTH: Very short arc
FLAT: Angle electrode 10°-15° from 90°
VERTICAL-UP: Use weaving techniques
VERTICAL-DOWN: Not recommended
OVERHEAD: Use slight weaving motion within the puddle

STORAGE

After opening, store in holding oven (250°F to 400°F) until used.

TYPICAL WELD METAL PROPERTIES* (Chem Pad)

TYPICAL DEPOSITION DATA (at optimum)

TYPICAL MECHANICAL PROPERTIES* (As Welded)

• 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 A5.5, E9018-M H4R
• ASME SFA 5.5, E9018-M H4R
• ABS
• DNV 5 YH5

RECONDITIONING

If exposed to atmosphere for extended periods, reconditioned for one (1) hour at 600°F.

TYPICAL CHARPY V-NOTCH IMPACT VALUES*

STANDARD DIAMETERS AND PACKAGES

TYPICAL DIFFUSIBLE HYDROGEN