Harris Silicon Bronze MIG GMAW Welding Wire 0.045 in, 30 lb Spool - 00SIBH8

Product Overview

What Is Harris Silicon Bronze MIG Wire 0.045 in (ERCuSi-A)?

The Harris 00SIBH8 is an ERCuSi-A classified silicon bronze MIG GMAW wire in 0.045 in (1.1 mm) diameter on a 30 lb production spool. This larger-diameter, higher-deposition version of Harris silicon bronze mig wire is designed for production and semi-production MIG brazing operations on thicker-gauge materials — structural steel sections, copper alloy fabrications, and cast iron — where the 0.035 in wire's deposition rate is too slow. Harris Products Group, a Lincoln Electric company, manufactures 00SIBH8 to AWS A5.7 ERCuSi-A specifications. WeldingMart is an authorized Harris distributor.

The 0.045 in diameter silicon bronze alloy (2.8–4.0% silicon) runs at higher amperage than fine-diameter silicon bronze, enabling faster fill of large-volume joints, multi-pass overlays, and dissimilar metal fabrications involving copper base metals and steel. The 30 lb spool reduces spool change frequency in production environments.

Specifications & AWS Classification

Best Applications

• Production braze welding: Semi-automatic MIG brazing of medium to heavy gauge steel assemblies, structural brackets, and copper-alloy fabrications at production speed.
• Copper pipe and fitting welding: High-deposition GMAW joining of copper base metals in plumbing, HVAC, and industrial piping.
• Cast iron repair: Larger bead, faster fill on cast iron pump casings, manifolds, and machine housings compared to 0.035 in wire.
• Dissimilar metal applications: Joining coated sheet steels, galvanized steel, and similar composition base metals in industrial fabrications requiring high throughput.
• Overlay and hardfacing: Depositing silicon bronze overlay on steel wearing surfaces for low-friction, corrosion-resistant bronze wearing surface applications.

How to Use — Settings and Process Parameters

Storage & Handling

Store in original sealed packaging at 40–120 °F. Use Teflon or nylon gun liners. U-groove or smooth drive rolls sized 0.040/0.045 in. Clean drive rolls regularly to remove bronze shavings that can accumulate and cause erratic wire feeding on long production runs.

Compatible Machines & Shielding Gas

Harris 00SIBH8 is compatible with any constant-voltage GMAW power source rated for 0.045 in wire. For production applications, Lincoln Electric Power MIG 256, Power Wave S350, or Lincoln 300MP are appropriate. See also Harris Silicon Bronze 0.035 in 2 lb, Harris Silicon Bronze 0.025 in 10 lb, and all welding wire.

FAQs — Harris Silicon Bronze MIG Wire 0.045 in

What diameter silicon bronze wire should I use for heavy-gauge steel MIG brazing?

For steel sections over 1/4 in or joints requiring fast fill, 0.045 in ERCuSi-A provides significantly higher deposition rates than 0.035 in wire at comparable amperage settings. The 0.045 in wire is the production choice for structural MIG brazing, pipe and fitting welding, and cast iron repair where throughput matters.

Can I use spray transfer with silicon bronze MIG wire?

Yes, spray transfer is achievable with 0.045 in ERCuSi-A silicon bronze at voltages above 24 V and wire feed speeds over 300 IPM. Spray transfer provides a higher deposition rate and a flatter, smoother bead. For thicker copper sections and production MIG brazing steel structures, spray transfer can increase productivity over short-circuit mode.

What shielding gas is required for 0.045 in silicon bronze?

100% Argon. Same requirement as all silicon bronze diameters. CO₂ or CO₂-containing blends (C25, C100) oxidize the silicon in the alloy, producing excessive slag and poor bead appearance. High-helium blends (50+ % He) are sometimes used for spray-transfer silicon bronze on heavy copper sections but are more expensive.

How does 0.045 in silicon bronze MIG wire compare to 0.035 in?

The 0.045 in wire runs at 150–220 A vs 80–150 A for 0.035 in. Deposition rate is roughly 2–3× higher per pass. This makes 0.045 in more efficient for thick sections and production work. For thin auto-body panels (18–24 gauge), use 0.025 or 0.035 in for better heat control.

Does silicon bronze MIG wire work on galvanized steel at 0.045 in?

Yes. Silicon bronze MIG brazing on galvanized steel works across all diameters. The 0.045 in wire produces more heat than 0.035 in, so ventilation for zinc vaporization is even more important. Ensure adequate airflow and PPE. The process still minimizes zinc burn-back compared to steel MIG wire at equivalent thicknesses.

Can I use silicon bronze 0.045 in to weld copper pipe?

Yes. ERCuSi-A MIG welding copper pipe follows the same process as ERCu (deoxidized copper), but with silicon bronze filler providing the weld deposit. For pure copper pipe where the deposit chemistry must closely match the base metal for corrosion resistance, ERCu is preferred. Silicon bronze deposits have 3–4% silicon which is fine for most plumbing and HVAC applications.

What contact tip size for 0.045 in silicon bronze MIG wire?

Use a 0.045 in contact tip. ERCuSi-A copper-silicon alloy is slightly softer than steel wire of the same diameter. A dedicated 0.045 in tip sized for soft wire is optimal; standard 0.045 in steel contact tips also work but may show accelerated wear from the softer alloy.

Product Selection and Ordering Guide — Silicon Bronze MIG Wire 0.045 in

When you find the right silicon bronze wire for production work, the 30 lb spool format offers the best value and the lowest spool-change downtime. The weight of 00SIBH8 is 30 lbs (13.6 kg) on a standard 12 in diameter spool — check your feeder's maximum spool capacity before ordering. We recommend this product for shops that regularly run 0.045 in silicon bronze on structural steel MIG brazing, copper welding production, and cast iron repair. If you cannot find a 0.045 in silicon bronze listed for your specific application, read the ERCuSi-A base specification for guidance. A common problem encountered with large-spool silicon bronze is drive roll buildup from soft alloy shavings — address this by choosing U-groove rolls and cleaning them every 4–8 hours of production use. Offer feedback to your welding supply representative if you need a custom spool size not shown here.

Silicon Bronze 0.045 in MIG Wire — Production Braze Welding Guide

Harris 00SIBH8 provides ERCuSi-A silicon bronze MIG wire at 0.045 in (1.2 mm) diameter in a 30 lb spool — the large-diameter, high-volume format for production MIG brazing of galvanized steel, thin structural sheet, and silicon bronze fabrication where deposition rate and spool economy matter. At 0.045 in, this wire deposits silicon bronze at 200–350 A, producing higher deposition rates than 0.035 in wire and significantly higher than 0.025 in — ideal for automotive frame braze welding lines, HVAC production, and marine fabrication shops that braze weld daily in volume.

0.045 in vs. 0.035 in Silicon Bronze Wire — Production Comparison

The 30 lb spool provides approximately 1,500–2,000 linear feet of 0.045 in silicon bronze wire, giving production MIG brazing stations significant run time between spool changes. For a shop running silicon bronze MIG brazing on automotive structural components or roof panels at 8 hours/day, one 30 lb spool supports multiple production shifts — improving throughput and reducing operator downtime for spool changes.

Production MIG Braze Welding with 0.045 in Silicon Bronze

Silicon bronze MIG brazing at 0.045 in diameter enables spray transfer at 200+ A, which provides a stable, high-deposition arc that short-circuit transfer at 0.035 in cannot match for production throughput. Spray transfer silicon bronze produces:

• Very low spatter compared to CO₂-shielded steel MIG spray transfer
• Excellent weld pool visibility through the clear 100% Ar shielding
• Smooth, flat bead profile requiring minimal post-weld grinding in assembly operations
• Consistent penetration profile on structural steel flanges and HSS rectangular sections

Configure the GMAW machine for spray transfer with 0.045 in ERCuSi-A: set voltage to 25–29 V and wire feed to 220–350 IPM. Listen for the characteristic frying/hissing sound of spray transfer (no detectable spatter sound). If short-circuit "snap" sounds are audible, increase voltage 1 V at a time until transition. 100% argon is mandatory — CO₂ prevents spray transition in silicon bronze, producing an unstable arc.

Automotive Structural Silicon Bronze Braze Welding

Modern automotive body assembly (particularly EV and hybrid platforms) uses silicon bronze MIG brazing for joining advanced high-strength steel (AHSS) roof rails, B-pillars, and structural stampings. The advantages over resistance spot welding and steel MIG in these applications:

• Maintains AHSS strength: Low heat input of MIG brazing avoids the HAZ softening that occurs in AHSS when welded with steel MIG wire at full fusion temperatures. AHSS strength is heat-treatment dependent — fusion welding destroys the heat treatment in the HAZ; brazing preserves it.
• Zinc coating preservation: Galvanized and galvannealed coatings remain largely intact adjacent to the braze joint, maintaining corrosion protection continuity across the vehicle's body structure.
• Reduced distortion: Lower heat input produces less thermal distortion on outer-visible panels, reducing straightening and grinding operations in the body shop.
• Visual weld quality: Silicon bronze braze welds produce smooth, low-profile beads that require minimal dressing before paint — reducing body prep labor.

Harris 00SIBH8 silicon bronze 0.045 in 30 lb spool is an authorized WeldingMart product. See also Harris Silicon Bronze 0.035 in 2 lb Spool and Harris Silicon Bronze 0.025 in 10 lb Spool for lighter-gauge applications.

Silicon Bronze 0.045 in MIG Wire — Production Braze Welding Guide

Harris 00SIBH8 provides ERCuSi-A silicon bronze MIG wire at 0.045 in (1.2 mm) diameter in a 30 lb spool — the large-diameter, high-volume format for production MIG brazing of galvanized steel, thin structural sheet, and silicon bronze fabrication where deposition rate and spool economy matter. At 0.045 in, this wire deposits silicon bronze at 200–350 A, producing higher deposition rates than 0.035 in wire and significantly higher than 0.025 in — ideal for automotive frame braze welding lines, HVAC production, and marine fabrication shops that braze weld daily in volume.

0.045 in vs. 0.035 in Silicon Bronze Wire — Production Comparison

The 30 lb spool provides approximately 1,500–2,000 linear feet of 0.045 in silicon bronze wire, giving production MIG brazing stations significant run time between spool changes. For a shop running silicon bronze MIG brazing on automotive structural components or roof panels at 8 hours/day, one 30 lb spool supports multiple production shifts — improving throughput and reducing operator downtime for spool changes.

Production MIG Braze Welding with 0.045 in Silicon Bronze

Silicon bronze MIG brazing at 0.045 in diameter enables spray transfer at 200+ A, which provides a stable, high-deposition arc that short-circuit transfer at 0.035 in cannot match for production throughput. Spray transfer silicon bronze produces:

• Very low spatter compared to CO₂-shielded steel MIG spray transfer
• Excellent weld pool visibility through the clear 100% Ar shielding
• Smooth, flat bead profile requiring minimal post-weld grinding in assembly operations
• Consistent penetration profile on structural steel flanges and HSS rectangular sections

Configure the GMAW machine for spray transfer with 0.045 in ERCuSi-A: set voltage to 25–29 V and wire feed to 220–350 IPM. Listen for the characteristic frying/hissing sound of spray transfer (no detectable spatter sound). If short-circuit "snap" sounds are audible, increase voltage 1 V at a time until transition. 100% argon is mandatory — CO₂ prevents spray transition in silicon bronze, producing an unstable arc.

Automotive Structural Silicon Bronze Braze Welding

Modern automotive body assembly (particularly EV and hybrid platforms) uses silicon bronze MIG brazing for joining advanced high-strength steel (AHSS) roof rails, B-pillars, and structural stampings. The advantages over resistance spot welding and steel MIG in these applications:

• Maintains AHSS strength: Low heat input of MIG brazing avoids the HAZ softening that occurs in AHSS when welded with steel MIG wire at full fusion temperatures. AHSS strength is heat-treatment dependent — fusion welding destroys the heat treatment in the HAZ; brazing preserves it.
• Zinc coating preservation: Galvanized and galvannealed coatings remain largely intact adjacent to the braze joint, maintaining corrosion protection continuity across the vehicle's body structure.
• Reduced distortion: Lower heat input produces less thermal distortion on outer-visible panels, reducing straightening and grinding operations in the body shop.
• Visual weld quality: Silicon bronze braze welds produce smooth, low-profile beads that require minimal dressing before paint — reducing body prep labor.

Harris 00SIBH8 silicon bronze 0.045 in 30 lb spool is an authorized WeldingMart product. See also Harris Silicon Bronze 0.035 in 2 lb Spool and Harris Silicon Bronze 0.025 in 10 lb Spool for lighter-gauge applications.

Silicon Bronze 0.045 MIG Wire — Coated Sheet Steels, Cast Iron, and Galvanized Steels Guide

Harris 00SIBH8 silicon bronze MIG wire 045 is formulated with silicon bronze alloy ERCuSi-A for MIG brazing galvanized steels, coated sheet steels, cast iron, and copper base metals at higher production rates than 0.035 in wire. The wire features silicon bronze alloy chemistry identical to the smaller diameter variants — the same ERCuSi-A classification means the same corrosion resistance, galvanic compatibility, and deoxidizing reaction that makes silicon bronze MIG suitable for joining dissimilar metals.

For coated sheet steels in structural and automotive applications, silicon bronze mig wire 045 operates at spray transfer settings that produce flat, smooth beads with minimal post-weld grinding. Weld galvanized steels frequently encountered in construction, HVAC, and agricultural equipment fabrication using 0.045 in silicon bronze MIG wire for production-rate brazing. Galvanized steels require adequate ventilation when MIG brazing — zinc vapor from the galvanized coating is released during the brazing process and requires local exhaust ventilation to maintain zinc fume exposure below ACGIH TLV.

For silicon bronze base metals and copper base metals, the 0.045 in wire produces matching-chemistry deposits that bond directly to copper silicon alloy, brass, and bronze base materials without galvanic incompatibility at the joint. The copper silicon alloy deposit from 00SIBH8 matches the base metal color and chemistry closely, making it suitable for visible decorative and architectural silicon bronze fabrication. Similar composition base metals including naval brass, red brass, and silicon bronze castings all join well with ERCuSi-A filler. For welding base metals of cast iron, silicon bronze mig brazing at 0.045 in is productive for cast iron repair of large sections — machine bases, automotive blocks, and agricultural implement housings where deposition rate matters. Mig welding wire 045 in the 30 lb spool format reduces per-pound cost and spool change frequency in production silicon bronze mig brazing operations.

Silicon Bronze 0.045 Wire — High-Volume Weld Applications, Brass, and Frequently Used Materials

Harris 00SIBH8 silicon bronze MIG wire 045 is frequently used in production MIG brazing operations that require higher metal deposition rates than 0.035 in wire. This wire is used to weld and braze weld coated sheet steel, copper brass fittings, cast iron components, and similar composition base metals in volumes where the 30 lb spool is the economical choice. Copper content (approximately 93–96% Cu in ERCuSi-A) in the welding wire provides the corrosion resistance and galvanic compatibility that makes silicon bronze the preferred welding alloy for galvanized steels, brass, and copper base materials.

Brass is frequently used as a base metal for silicon bronze MIG brazing in plumbing fittings, marine hardware, and architectural assemblies. Silicon bronze MIG wire wets brass well because the copper content similarity reduces galvanic potential difference at the joint. The welding alloy deposits a bronze metal layer that bonds to brass without the dezincification risk of oxygen-bearing torch brazing. Weld similar composition base metals including red brass (85% Cu), naval brass (60/40 Cu/Zn), and commercial bronze with 0.045 in ERCuSi-A at slightly higher amperage settings than used on steel — the brass base metal has lower melting point than steel and responds to lower voltage settings. Frequently used to weld galvanized steels in HVAC ductwork assembly, automotive structural components, and agricultural equipment, this welding wire 045 performs consistently in short-circuit and spray transfer modes. The metal deposition rate at 0.045 in is 5–9 lb/hr, meaning a 30 lb spool supports several shifts of high-volume production brazing before requiring a spool change. Used to weld cast iron for large section repairs in industrial maintenance, the 0.045 in wire provides productive fill at 150–250 A on sections where 0.035 in would require too many passes.

Silicon Bronze 0.045 Wire — Welding Coated Sheet, Copper Content, Gases, and Applications

Harris silicon bronze MIG wire 045 is used to weld similar composition base metals including silicon bronze base metals, bronze base metals generally, and copper base metals including brass or copper base materials. Bronze base metals generally do not require preheat for brazing with ERCuSi-A unless the section is over 1/4 in thick. The silicon bronze alloy deposits 100 argon for shielding is mandatory — gases like CO₂ or mixed blends are not suitable for silicon bronze MIG wire. Argon shielding gases protect the copper-silicon weld pool from oxidation. Use 100% argon for shielding on all silicon bronze MIG applications — no CO₂, no C25, no active gases.

For welding of coated sheet steel with silicon bronze 0.045 wire, the process is MIG brazing, not fusion welding. Copper content and thickness of the coated sheet determine voltage and current settings — copper content of the ERCuSi-A wire is approximately 93–96%, providing the wetting force needed to bond to galvanized steel. Depending on copper content and thickness of the base metal, voltage ranges from 22 V (thin coated sheet) to 28 V (heavier gauge structural). Used to weld similar composition base metals including bronze castings and copper fittings, silicon bronze MIG wire generally does not require flux. Copper base metals may require preheat depending on section thickness. Bronze base metals generally respond well to silicon bronze overlay without preheat on thin sections. The MIG wire 045 is used to weld galvanized steels frequently in construction, automotive, and HVAC assembly. Gases in the argon family provide the best arc stability and deposit quality for silicon bronze MIG applications — helium blends are acceptable for heavy copper base metals but are not required for coated sheet steel applications. Add 00SIBH8 to cart for secure checkout via the WeldingMart website.