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Home » Products » Low Hydrogen Electrode » Premium 18 A1

Premium 18 A1

Premium 18 A1
Premium 18 A1
Product Code : 31
Product Description

Classification :

  • IS : 1395 - 82 : E49B-A1 26 Fe
  • AWS / A 5.1 : E 7018 A1

Description

A low hydrogen iron powder type electrode for welding of 0.5% Mo steels and other low alloy steels for elevated service temperatures up to 525oC. Welds are of radiographic quality. Metal recovery is minimum 110%.

Applications :

  • High Temp. boilers
  • Welding of 0.5% Mo steels for service temp. up to 525oC
  • Pipes and tubes
  • Pressure Vessel-

Chemical Composition of Weld Al (wt.%)

C

Mn

Si

Mo

S

P

0 - 0.10 max

0.9 max

0.6 max

0.4 - 0.65

0.03 max

0.03 max

Mechanical Properties Of Weld Metal :

YS

46 - 57 Kgf/mm2

UTS

55 - 68 Kgf/mm2

Elongation

25 % min

Current Conditions : AC (50V) / DC ( + )

Size (mm)

2.5 x 350

3.15 x 450

4 x 450

5 x 450

Amps

70 - 100

100 - 140

140 - 180

190 - 240

Recommendation :

  • Redry the electrodes at 350oC for one hour or at 250oC for two hours. Use short arc during welding.. Preheat and interpose temperature of 100 - 150oC is recommended.

Welding Positions : F, H, V-up, OH


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