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ATOM ARC 8018

Atom Arc 8018 electrodes deposit 1% Ni weld metal. It is used primarily to weld high-tensile steels, especially where notch toughness at low temperatures is required.

Features

Atom Arc 8018 electrodes deposit 1% Ni weld metal. They are used primarily to weld high-tensile steels in the 70-80 ksi (483-552 MPa) tensile strength range, especially where notch toughness at temperatures as low as -40°F (-40°C) is required.

Atom Arc 8018
  • Industry
  • Process
  • Pipeline
  • Bridge Construction
  • Power Generation
  • Mobile Machinery
  • Shipbuilding
  • Petrochemical
  • General Fabrication
  • Welding Process
  • SMAW (Stick)

Classifications

  • Classifications/Approvals

    • L.R.- 4Y40m(H10)
    • ASME SFA 5.5
    • QPL-22200/1; MIL-8018-C3
    • A.B.S.- 3Y/AWS A5.5; E8018-C3

Properties

Typical Properties
As Welded  
Yield Strength 74 ksi, 510 MPa
Tensile Strength 85 ksi, 585 MPa
Elongation in 2" 30 %
Stress Relieved 8 hrs. @ 1150ºF (621ºC)  
Yield Strength 70 ksi, 485 MPa
Tensile Strength 81 ksi, 560 MPa
Elongation in 2" 30 %
Typical Charpy V-Notch Impact Properties  
Testing Temperature -20ºF (-29ºC)  
As Welded 124 ft.-lbs., 168 J
Stress Relieved 8 hrs. @ 1150ºF (621ºC) 129 ft.-lbs., 175 J
Testing Temperature -40ºF (-40ºC)  
As Welded 114 ft.-lbs., 154 J
Stress Relieved 8 hrs. @ 1150ºF (621ºC) 115 ft.-lbs., 156 J
Typical Undiluted Weld Metal Analysis  
C .046 %
Mn 1.11 %
Si .33 %
P 0.014 %
S .010 %
Ni .97 %
Mo .12 %

SAW

Accessories

Depositions

Deposition Table
Diameter Optimal Amperage Range Amperage Deposition Rate Efficiency
3/32 in, 2.4 mm 90 A 70 - 100 1.7 lbs./hr., 0.8 kg./hr. 66.3 %
1/8 in, 3.2 mm 120 A 90 - 160 2.6 lbs./hr., 1.2 kg./hr. 71.6 %
140 A 90 - 160 2.7 lbs./hr., 1.2 kg./hr. 70.9 %
5/32 in, 4.0 mm 140 A 130 - 220 3.1 lbs./hr., 1.4 kg./hr. 75 %
170 A 130 - 220 3.8 lbs./hr., 1.7 kg./hr. 73.5 %
3/16 in, 4.8 mm 200 A 200 - 300 4.9 lbs./hr., 2.2 kg./hr. 76.4 %
250 A 200 - 300 5.4 lbs./hr., 2.4 kg./hr. 74.6 %
7/32 in, 5.6 mm 250 A 250 - 350 6.5 lbs./hr., 2.9 kg./hr. 75 %
300 A 250 - 350 7.2 lbs./hr., 3.3 kg./hr. 74 %
1/4 in, 6.4 mm 300 A 300 - 400 7.7 lbs./hr., 3.5 kg./hr. 78 %
350 A 300 - 400 8.7 lbs./hr., 3.9 kg./hr. 77 %

Extra Info

Preheat should be used on hardenable steels to prevent the formation of a hard heat-affected zone. Preheat may also be required in welding heavy sections