They share identical chemical composition (AlSi12, 11.0–13.0% Silicon), only differing in form, production process, applicable equipment, working efficiency and price.
ER4047 TIG Rod (Straight Welding Rod) AWS designation: R4047; fixed-length straight bars, common length 1000mm, diameters 2.0/2.4/3.0/4.0mm
ER4047 Spool MIG Wire AWS designation: ER4047; wound on plastic spools/drums, regular diameters 0.8/1.0/1.2/1.6mm, 2.0mm available upon request
Item | ER4047 Straight TIG Rod | ER4047 Spool MIG Wire |
Matching Welder | GTAW/TIG welding machine (manual operation) | GMAW/MIG welder, robotic automatic welding equipment |
Feeding Method | Manual feeding, replace rod after each piece | Automatic continuous feeding, non-stop welding |
Production Process | Melting → wire drawing → straightening → cutting → polishing → packing | Melting → wire drawing → multi-stage annealing → spool winding → surface cleaning |
Common Sizes | Thick diameters: 2.0/2.4/3.0/4.0mm | Thin diameters: 0.8/1.0/1.2/1.6mm |
Welding Efficiency | Low, frequent rod replacement; for small parts & repair | High, continuous operation for mass production & assembly lines |
Typical Applications | Aluminum casting repair, radiator maintenance, on-site sporadic welding, flame brazing | Mass aluminum parts, automotive aluminum frames, automated production lines, long continuous welds |
Packaging | 5kg / 10kg moisture-proof cartons | 0.5kg / 1kg small spools, 5kg / 7kg industrial spools, 136kg bulk drums |
Unit Cost | Higher; extra straightening & cutting process cost | Lower; no cutting procedure, cost-effective for bulk orders |
Emergency on-site repair, aluminum radiator & air conditioner pipe mending, casting defect rework
No automatic wire feeding system, only portable TIG machines
Short weld seams, scattered workpieces, outdoor mobile operation
Flame brazing with brazing flux
Mass production assembly lines, robotic automatic welding
Long continuous welds, aluminum frames & aluminum box batch fabrication
Demand for fast welding speed & less downtime for rod replacement
For high-volume aluminum fabrication, an automated welding production line using ER4047 spool wire supports continuous feeding, robotic welding, and reduced production downtime.
Mechanical performance, weld fluidity and crack resistance are exactly the same for both forms. Only physical shape varies. 2.0mm size is available for both styles, yet straight rods cost much more than the same-diameter spool wire. Separate quotations are required for export offers.
