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ATOM ARC 9018-B9

Atom Arc 9018-B9 is designed to weld the modified 9% Cr - 1% Mo steels known by the designations T91, P91 or Grade 91.

Features

Atom Arc 9018-B9 is designed to weld the modified 9% Cr - 1% Mo steels known by the designations T91, P91 or Grade 91. These steels are designed to provide improved creep strength, toughness, fatigue, and oxidation and corrosion resistance at elevated temperatures.

Atom Arc 9018-B9
  • Industry
  • Power Generation
  • Petrochemical
  • Pipeline
  • Process
  • Welding Process
  • SMAW (Stick)

Classifications

  • Classifications/Approvals

    • SFA/AWS A5.5; E9018-B9H4R

Properties

Typical Properties
Stress Relieved 2 hrs. @ 1375ºF (746ºC)  
Yield Strength 94 ksi, 648 MPa
Tensile Strength 110 ksi, 758 MPa
Elongation in 2" 18 %
Typical Charpy V-Notch Impact Properties  
Testing Temperature 72ºF (22ºC) 52 ft.-lbs., 70 J
Typical Undiluted Weld Metal Analysis  
C 0.10 %
Mn 1.0 %
Si 0.2 %
P 0.010 %
S 0.010 %
Cr 9.0 %
Ni 0.2 %
Mo 1.0 %
V 0.2 %
Cu 0.1 %
Nb 0.04 %
N 0.035 %

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

Extra Info

The recommended preheat temperature for 9CrMo steels is 450-550°F depending on thickness. Post weld heat treatment is generally required.