Chalco supplies ER4643/R4643 aluminum welding filler metal for selected aluminum alloy welding applications. ER4643 aluminum welding wire is an aluminum-silicon-magnesium filler material within our aluminum welding wire range, used where base alloy compatibility, weld performance, and post-weld mechanical properties require careful consideration.
Review ER4643 MIG welding wire and R4643 TIG filler rod requirements, available diameter references, AWS A5.10 and AMS 4189 specifications, and packaging options below. Share your welding process, base alloy, required form, and order quantity with Chalco to confirm suitable supply options.
Specification of Chalco R4643/ER4643 welding wire
ER4643/R4643 welding filler metal is identified under AWS A5.10 and ASME SFA-5.10 classifications, with AMS 4189 requirements also referenced for applicable orders. Buyers should specify the required standard and revision, filler classification, product form, diameter, and supporting documentation when submitting an RFQ. Compliance with individual specifications should be confirmed for the supplied material.
Chalco R4643/ER4643 welding wire chemical composition
| Chemical composition table | |
| Silicon | 3.6-4.6 |
| Iron | 0.8 |
| Copper | 0.1 |
| Beryllium | 0.0008 |
| Manganese | 0.05 |
| Magnesium | 0.10-0.30 |
| Zinc | 0.1 |
| Titanium | 0.15 |
| Each | 0.05 |
| Total Other | 0.15 |
| Aluminum | Remainder |
Chalco R4643/ER4643 welding wire performance parameter table
| Physical and mechanical properties | |
| Melting Range | 1065-1175°F (574-635°C) |
| Density at 68°F | 0.097 lbs./in³ |
| Resistance to Corrosion | B (Gen) A (SCC) |
| Anodize Color | Gray |
ER4643 MIG welding wire is used as a continuously fed electrode in suitable GMAW applications. For a broader overview of aluminum MIG welding wire and related filler material selection, see the product category guide. The following reference parameters cover wire diameter, current, voltage, travel speed, and shielding gas flow; actual welding settings depend on the base material and qualified procedure.
| Typical GMAW welding procedures; DCEP | ||||
| Wire Diameter | Amps | Volts | Travel speed (ipm) | Argon (cfh) |
| 0.030 | 60-175 | 15-24 | 25-45 | 25-30 |
| 0.035 | 70-185 | 15-27 | 25-40 | 30-35 |
| 3/64 | 125-260 | 20-29 | 24-35 | 35-45 |
| 1/16 | 170-300 | 24-30 | 28-38 | 45-55 |
| 3/32 | 275-400 | 26-31 | 14-20 | 60-75 |
R4643 TIG filler rod is selected according to rod diameter, base metal thickness, joint design, and the applicable GTAW procedure. The parameters below are reference values rather than universal welding settings.
| Typical GTAW welding procedures; ACHF with pure or zirconiated hemisphere shape tungsten tip | ||||||
| Filler Wire Size | Tungsten | Amps | Volts | Gas Cup Size | Argon (cfh) | Base thickness |
| 1/16" | 1/16" | 60-80 | 15 | 3/8" | 20 | 1/16" |
| 3/32" | 3/32" | 125-160 | 15 | 3/8" | 20 | 1/8" |
| 1/8" | 1/8" | 190-220 | 15 | 7/16" | 20 | 3/16" |
| 5/32" | 5/32" | 200-300 | 15 | 1/2" | 25 | 1/4" |
| 3/16" | 3/16" | 330-380 | 15-20 | 5/8 | 25 | 3/8" |
| 1/4" | 1/4" | 400-450 | 25 | 5/8 | 25 | 1/2" |
Chalco R4643/ER4643 welding wire standard wire diameter
| Diameter | .030; .035; 3/64; 1/16; 3/32; 1/8; 1/16; 3/32; 1/8; 5/32; 3/16; 1/4 |
| Package form reference | 4 & 12 in. Spools Straight lengths |
ER4643 welding filler metal is referenced in spool and straight-length forms. For a quotation, confirm the required wire or rod diameter, spool specification or cut length, packaging configuration, and order quantity. Listed dimensions and available supply options should be verified against the order requirements.
ER4643 welding wire and filler rods are available for specification review based on your welding process, required diameter, and order quantity. Contact Chalco to confirm suitable supply options and pricing.
Chalco R4643/ER4643 welding wire performance advantages
- Base alloy compatibility: ER4643 filler metal can be evaluated for selected heat-treatable aluminum alloy joints, including suitable 6xxx series applications. The required filler classification should be checked against the base alloy, temper, joint design, and service requirements.
- Welding characteristics: The aluminum-silicon-magnesium composition of ER4643 provides a filler option for applications where weldability and post-weld mechanical properties are important. Weld cracking susceptibility, joint strength, and appearance depend on the material combination and welding procedure.
- Corrosion considerations: The corrosion performance of a welded assembly depends on the base metal, filler metal, environment, and any surface treatment. For demanding service conditions, the complete joint and relevant testing requirements should be evaluated.
Chalco R4643/ER4643 welding wire application technical guide
ER4643 is an aluminum-silicon-magnesium filler alloy considered for selected heat-treatable aluminum alloy welding applications. For compatible 6061, 6063, and related 6xxx series joints, filler selection should account for the base metal, welding process, joint configuration, and required post-weld properties. Additional considerations for 6061 aluminum welding can help buyers evaluate the joining process and related technical requirements.
Selected aluminum sections: ER4643 may be evaluated for compatible aluminum joints, including certain thicker sections and multipass welding applications. Joint geometry, base metal dilution, and welding procedure qualification should be considered when assessing the required weld properties.
Welding process and handling: Wire feeding, filler condition, joint preparation, and process control can affect production consistency. The required wire or rod form should be selected to match the welding equipment and application.
Post-weld heat treatment: ER4643 filler metal may be considered for selected heat-treatable 6xxx series aluminum alloy joints where post-weld solution treatment and artificial aging are part of the manufacturing process. The resulting joint strength depends on the base alloy, temper, welding procedure, and heat treatment conditions. Required mechanical properties should be verified against the project specification.
Chalco ER4643 Aluminum Welding Wire Cooperation Field
ER4643 aluminum welding wire and TIG filler rod may be considered for selected heat-treatable 6xxx series aluminum structures, particularly where the welding procedure and post-weld heat treatment are designed around the required joint properties. Final filler-metal selection should be verified against the base alloy, temper, service conditions, and project specification.
Industrial Frames and Equipment
For selected 6061 and other compatible 6xxx aluminum frames, platforms, and equipment structures requiring controlled MIG or TIG welding.
Chalco supports alloy and diameter selection, batch documentation, and welding-procedure evaluation for industrial orders.
Heavy-Section Structural Joints
ER4643 may be evaluated for thick-section 6xxx aluminum joints where weld strength and subsequent heat treatment are considered in the manufacturing plan.
Controlled filler-metal chemistry and lot traceability help customers maintain consistent qualification and production records.
Rail Transit Structures
For selected rail components made from compatible heat-treatable 6xxx aluminum alloys, subject to the approved joint design and welding procedure.
Chalco can supply MIG wire or TIG straight lengths with specified dimensions, packaging, certification, and inspection documents.
Automotive Aluminum Structures
ER4643 may be considered for qualified automotive frames and structural assemblies fabricated from compatible 6xxx aluminum products.
Chalco provides specification review, stable batch supply, material certificates, and support for customer-defined quality requirements.
ER4643 Welding Wire Buying Guide
When sourcing ER4643/R4643 filler metal, confirm the base alloy, welding process, filler form, required standard, and joint performance requirements before ordering.
ER4643 Filler Metal Selection
ER4643 MIG wire is intended for GMAW applications, while R4643 TIG filler rod is used for GTAW. Selection should also consider any post-weld heat treatment requirements.
Customers comparing a wider range of aluminum filler alloys can review Chalco's 16 aluminum welding wire grades. For different welding requirements, related filler metals include:
- ER4043 aluminum welding wire: An aluminum-silicon filler for compatible aluminum alloy welding applications.
- ER4943 aluminum welding filler metal: A related filler alloy that may be evaluated for suitable aluminum welding applications where the specified weld properties and welding procedure require a different filler selection.
- ER5356: Aluminum-magnesium filler for selected structural and general fabrication requirements.
- ER5183: Aluminum-magnesium filler for selected structural welding applications.
- ER4047: Higher-silicon aluminum filler for suitable welding applications.
These filler metals are not direct substitutes; selection depends on the base alloy and required weld properties.
ER4643 Sizes, Packaging and Ordering
For MIG wire, confirm the diameter and spool specifications. For TIG filler rods, confirm the diameter and straight length. Packaging and available sizes should be verified before ordering.
For a quotation, please provide: ER4643/R4643 classification, applicable standard, MIG/TIG process, diameter, spool size or rod length, quantity, destination, and any special technical or documentation requirements.
Send your specifications or drawings to Chalco to confirm supply options and receive a quotation. Buyers with additional joining material requirements can also explore our aluminum welding and brazing materials product range.
ER4643 Aluminum Welding Wire FAQ
What is the difference between ER4643 MIG wire and R4643 TIG filler rod?
ER4643 wire is used as a continuously fed electrode in suitable MIG/GMAW applications, while R4643 filler rod is used in GTAW/TIG applications. Confirm the required classification, diameter, and product form according to your welding procedure.
Is ER4643 suitable for welding 6061 or 6063 aluminum?
ER4643/R4643 may be evaluated for selected 6061 and 6063 aluminum alloy joints, depending on the base material temper, required joint properties, and welding procedure. Any post-weld heat treatment requirements should also be considered during filler selection.
Can ER4643 be supplied to AWS A5.10 or AMS 4189 requirements?
Please specify the required standard, revision, product form, and documentation when sending your inquiry. Chalco can review the requested specification and confirm the applicable supply and documentation options before quotation.
Chalco can provide you the most comprehensive inventory of aluminum products and can also supply you customized products. Precise quotation will be provided within 24 hours.
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