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ER4047 Aluminum TIG Welding Rod - 36" Straight Lengths

The ER4047 TIG aluminum welding rod is a high-silicon aluminum filler metal designed for brazing and for welding cast and wrought aluminum where maximum fluidity and crack resistance are required. Each rod measures 36 inches. With a nominal 11-13% silicon content, ER4047 has a lower melting range and a much narrower freezing range than ER4043, so it flows into tight joints, fills gaps cleanly and produces dense, leak-tight welds with minimal shrinkage cracking.

Key Features

High-silicon 12% aluminum filler - nominal 11-13% Si gives a lower melting range and very narrow freezing range, so it flows freely into tight joints and solidifies with far less shrinkage cracking than standard ER4043.
Full 36" straight lengths in 1/16", 3/32" and 1/8" diameters - fewer rod changes and less waste than short 16" hobby rods.
Packed in 1, 2, 5 and 10 lb quantities - buy a 1 lb bundle for a single repair or a 10 lb box for production work.
Built for brazing and cast aluminum repair - excellent wetting and gap filling on castings and thin sections.
Conforms to AWS A5.10 / ASME SFA 5.10 ER4047 chemistry for consistent, repeatable results.

Applications

Aluminum torch brazing and TIG brazing
Radiators, heat exchangers and leak-tight vessels
Engine, transmission and pump housings
356 / A356 / 413 cast aluminum repair
Cladding and joining 1100, 3003 and 6XXX series aluminum

Technical Specifications

AWS Classification	ER4047 (AWS A5.10 / ASME SFA 5.10)
Alloy Type	Aluminum-Silicon, nominal 11-13% Si
Process	GTAW (TIG) / torch brazing
Rod Length	36 in (914 mm)
Diameters	1/16", 3/32", 1/8"
Pack Sizes	1 lb, 2 lb, 5 lb, 10 lb
Shielding Gas	100% Argon (Argon/Helium for heavy sections)
Current	AC (HF start) for aluminum
Melting Range	Approx. 1070-1080 F (577-582 C)
Country of Origin	USA

Sizes & Typical Amperage

Diameter	Typical AC Amperage	Base Metal Thickness
1/16" (1.6 mm)	70-110 A	1/16" - 1/8"
3/32" (2.4 mm)	100-160 A	1/8" - 3/16"
1/8" (3.2 mm)	140-220 A	3/16" and heavier

Storage & Handling

Store rods in a dry, clean area and keep them free of oil and moisture. Clean the base metal to bright with a dedicated stainless brush and degrease before welding for best results.

Please note: ER4047 welds finish slightly darker than the base metal and are not recommended where the part will be anodized for appearance. For structural welds requiring higher elongation, choose ER4043 or ER5356.

WARNING: This product can expose you to chemicals including nickel, chromium compounds and carbon monoxide, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov