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ATOM ARC 8018-CM

Atom Arc 8018-CM is an all-position low hydrogen electrode used for welding steels such as 0.5% Cr - 0.5% Mo, 1% Cr -0.5% Mo, and 1% Cr - 0.5% Mo. Primarily used in power piping and boiler work for the fabrication of plates, pipes, tubes, castings and forging.

Features

Atom Arc 8018-CM electrodes contain 1.25% Cr and 0.50% Mo as alloy addition. They are used for the welding of such steels as 0.5% Cr - 0.5% Mo, 1% Cr - 0.5% Mo, and 1.25% Cr - 0.5% Mo, which are used principally in power piping and boiler work for the fabrication of plates, pipes, tubes, castings, and forgings.

Atom Arc 8018-CM
  • Industry
  • Power Generation
  • Process
  • Pipeline
  • Welding Process
  • SMAW (Stick)

Classifications

  • Classifications/Approvals

    • MILITARY-MIL-E-22200/8; MIL-8018-B2
    • SFA/AWS A5.5; E8018-B2H4R
    • A.B.S.- AWS A5.5; E8018-B2

Properties

Typical Properties
Stress Relieved 1 hr. @ 1275ºF (691ºC)  
Yield Strength 77 ksi, 535 MPa
Tensile Strength 90 ksi, 620 MPa
Reduction in Area 70 %
Elongation in 2" 26 %
Stress Relieved 8 hrs. @ 1275ºF (691ºC)  
Yield Strength 72 ksi, 495 MPa
Tensile Strength 86 ksi, 590 MPa
Reduction in Area 71 %
Elongation in 2" 27 %
Typical Undiluted Weld Metal Analysis  
C 0.07 %
Mn 0.6 %
Si 0.5 %
P 0.016 %
S 0.014 %
Cr 1.23 %
Mo 0.5 %

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.