ER 4340

(Priced Individually, Sold as a 10lb. Pack)

High-Performance Mild Steel TIG Welding Rod.

Price per pound:

• 1/16" (1.6mm): $62.48/lb.
• 3/32" (2.4mm): $63.00/lb.

Approximate number of rods per 10 lb. pack for each diameter:

• 1/16" (1.6mm): 260 - 300
• 3/32" (2.4mm): 120 - 160

ER 4340 - AISI 4340

ER4340 is a low alloy, copper-coated wire designed for the welding of heat-treatable, low alloy steels such as the SAI / AISI 4300 series where higher carbon grades are used or where greater tensile strengths are desired.

A pre-heat of 400°F - 550°F is required for some of the higher carbon grades to prevent cracking.

Proper heat-treating procedures will produce tensile strengths of 190,000 - 265,000 psi.

Hardness varies with heat-treating.

Learn More:

• Spec Sheet: PDF
• SDS: PDF