T169-1.6 - C-32 Nickel-Iron Cast Iron TIG Welding Rod - 1/16 in

Technical Overview: C-32 Nickel-Iron TIG Filler Metal

The C-32 Cast Iron TIG Rod (1/16" x 36") is a premium Nickel-Iron filler metal specifically formulated for the Gas Tungsten Arc Welding (GTAW) of cast irons. This alloy typically exhibits a composition similar to ENiFe-CI classifications, offering a weld deposit that combines the high tensile strength of steel with the ductility of nickel. This unique chemistry is essential for accommodating the different expansion coefficients between the weld metal and the cast iron base, significantly reducing the susceptibility to centerline cracking and porosity in the heat-affected zone (HAZ).

Process & Application:
Designed for use with DCEN (Direct Current Electrode Negative) polarity and 100% Argon shielding gas, the C-32 rod provides a clean, controllable weld pool. It is highly effective for joining dissimilar metals, such as welding cast iron to mild steel, stainless steel, or wrought iron. The 1/16" (1.6mm) diameter is particularly useful for fine detail work, thin-walled castings, or root passes where heat input must be strictly minimized to prevent thermal shock.

Machinability & Post-Weld Treatment:
Deposits made with C-32 are fully machinable, allowing for the restoration of threads and bearing surfaces. While pre-heating the base material (typically 300°F - 500°F) is recommended to slow the cooling rate and minimize stress, the C-32 alloy is forgiving enough for cold welding procedures when short beads and peening techniques are employed. Peening the weld bead while hot is highly advised to relieve contraction stresses and prevent cracking.

Key Specifications:

• Diameter: 1/16" (1.6mm)
• Length: 36"
• Packaging: 4.54kg (10lb) Tube
• Current: DCEN
• Shielding Gas: 100% Argon