Atom Arc 8018-NM

ESAB

Atom Arc 8018-NM

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Atom Arc 8018-NM electrodes are used for welding quenched and tempered manganese-molybdenum-nickel steels. This electrode was developed for use in pressure vessels for nuclear reactors where long terms stress relief is required.

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Industries

  • Offshore Oil
  • Pressure Vessels
  • Nuclear

Welding Process

  • SMAW/MMA (Stick)

Typical Charpy V-Notch Properties

Stress Relieved
Impact Value 118 ft-lb
Impact Value 160 J
1150 °F
621 °C
16 hr
Testing Temperature 0 °F
Testing Temperature -18 °C

Typical Tensile Properties

Condition Stress Relieved As Welded
Tensile Strength 607 MPa (88 ksi) 653 MPa (94.7 ksi)
Yield Strength 538 MPa (78 ksi) 588 MPa (85.2 ksi)
Elongation 29 % 27 %
Testing Time 16 hr
Testing Temperature 621 degC (1150 degF)

Deposition Data

Current Deposition Rate Diameter Deposition Efficiency (%) Optimal Amps
130-220 A 1.7 kg/h (3.8 lb/h) 4.0 mm (5/32 in.) 73.5 % 170 A
130-220 A 1.1 kg/h (3.1 lb/h) 4.0 mm (5/32 in.) 75 % 140 A

Classifications

Classifications ASME SFA 5.5 :
AWS A5.5 : E8018-NM H4R

Consumable Characteristics

Coating Type Low-hydrogen iron powder
0
Welding Current AC or DC+

Typical Weld Metal Analysis %

Typical Weld Metal Analysis %
C Mn Mo Ni P S Si
0.043 % 1.07 % 0.47 % 0.95 % 0.018 % 0.014 % 0.58 %
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