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E7028

AWS A5.1 E7028

E7028 is an iron powder, low hydrogen electrode developed for high deposition efficiency welding of flat and horizontal fillets, as well as deep groove joints in 71,000 psi, high tensile strength steel. This electrode produces X-ray quality weld deposits which exhibit high cracking resistance and excellent mechanical properties. In addition to its high deposition rate, E7028 provides easy slag removability and a nice bead appearance, free from undercuts. Welding efficiency can be further improved by using a gravity welder. This electrode can be used with AC or DC (reverse polarity). E7028 is used for welding strength members of ship hulls, bridges, heavy machinery parts and fired or unfired pressure vessels.

TYPICAL WIRE CHEMISTRY (%)

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E7028

AWS Spec

C

0.07

0.15 max.

Mn

0.98

1.6 max.

Si

0.52

0.9 max.

P

0.012

0.035 max.

S

0.010

0.035 max.

Ni

0.03

0.03 max.

Cr

0.03

0.2 max.

Mo

0.02

0.3 max.

V

0.01

0.08 max.

Mn + Ni + Cr + Mo + V


1.75 max.

Typical mechanical properties of weld metal (C02 shielding gas)

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E7028

AWS Spec

Yield Strength (psi)

69,000

58,000 min.

Ultimate Tensile Strength (psi)

81,000

70,000 min.

Elongation in 2" (%)

31

22 min.

Charpy V-notch at 0 F (ft. lbs)

94

20 min.

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