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ER90S-B3 - Mild Steel TIG Welding Rod - 1lb. Pack

ER90S-B3 - Mild Steel TIG Welding Rod - 1lb. Pack

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ER90S-B3

High-Performance Mild Steel TIG Welding Rod.

AWS A5.28 Grade
Class ER90S-B3
Available Diameters .045", 1/16", 3/32" & 1/8"
Length 36" (914mm)
Weight 1 lb. Pack

Approximate number of rods per 1 lb. pack for each diameter:

  • .045" (1.14mm): 36 - 40
  • 1/16" (1.6mm): 26 - 30
  • 3/32" (2.4mm): 12 - 16
  • 1/8" (3.2mm): 8 - 10

ER90S-B3 AWS A 5.28 CLASS ER 90S-B3

ER90S-B3 is a low alloy wire used to weld 2¼% Chromium, 1% Molybdenum low alloy steels.

ER90S-B3 produces quality welds on pressure piping or boiler work.

Depending on the hardening characteristics of the base metal, pre-heating from 400°F - 650°F, control of interpass temperatures and post heating at 1,250°F - 1,350°F for 1 hour is required.

Typical applications include pressure piping in steam power generating plants, boiler and heat-exchanger tubes, chemical and petrochemical processing equipment, and shipbuilding.

Tensile strength: 103,000 psi.

Elongation is 24%.

Charpy V-notch @ 72°F is 85 ft. lbs.


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