Galvanized Steel Wire

Galvanized Steel Wire belongs to the metal wire group, supplied as filament, strip fill, roller fill and molded blade or foam pad as applicable, drawn in round, crimped round and flat sections and set in straight rows, helical, staggered, zoned and wavy fill patterns.

Galvanized Steel Wire is a custom brush contact material selected by filament or blade geometry, temperature, moisture, chemicals and surface risk.

Change material when temperature, chemicals, static, shedding or surface marking becomes limiting.

Galvanized Steel Wire is rockwell B 70–100 (Base-Material Condition); brush behavior follows Low to Medium Flexibility flexibility and Rockwell B 70–100 (Base-Material Condition) hardness.

The part people get wrong: stiffness is not a property of the material on its own. A 0.50 mm filament on a 15 mm trim is stiffer than a 0.30 mm filament on a 25 mm trim in the same grade. Fix diameter and trim first, then confirm the material.

Galvanized steel wire absorbs no water; the zinc layer, not the steel, is what decides how long it survives a wet duty.

The zinc coating improves corrosion resistance in many wet environments, but coating damage, chlorides, crevices and chemistry still matter.

What this means for your application: the contact band is unaffected by water, but every cut, crimp and worn tip is a place where the zinc is gone and the steel underneath is exposed.

A practical check: look at the tips, not the trim. Rust at the tips first means the coating has worn through and the wire is now behaving as bare steel.

Do not assign one universal finished-brush temperature from the steel substrate. Zinc coating condition, wire temper, anchoring, hub, atmosphere and contact load set the usable brush temperature.

The filament tables quote 150–200°C continuous and 250–300°C peak. The tighter number above is the one to build to, because a brush is loaded while it is hot.

Where it stops working: validate with a sample if the process sits near the top of that band. A permanent bend under load means the answer is a higher-temperature filament family, not a heavier trim.

Diameter, trim length and applied load all shift the real limit, so a thin filament touching lightly survives conditions that would flatten a thick one under pressure.

Galvanized wire is not a universal chemical-service material. Acids, strong alkalis and some chloride conditions can attack zinc; check cleaner chemistry, concentration, temperature and exposure time.

Compatibility is a function of concentration, temperature and contact time together. A short rinse in a dilute solution is a different exposure from an overnight soak in a concentrated one, even with the same chemical on the label.

Before you commit to a quantity: Use resin or alloy grade TDS, ISO/ASTM property method and lot traceability when specified.

The floor is roughly 0.10 mm; finer than that and the filament snaps rather than flexes. In practice you are choosing inside 0.10–2.00 mm.

Free trim runs 5–300 mm, and the two interact: a finer filament needs a shorter trim to keep useful stiffness, while a thicker one carries a longer trim and still lands pressure on the tip.

Split the range by duty: roughly 0.10–0.57 mm for light wiping, dusting and surfaces that mark easily, and 0.57–2.00 mm where residue is packed on and point pressure matters more than surface risk.

Tip treatments available on this filament: hot-dip galvanizing, electrogalvanizing, passivation and rust-preventive oil.

In practical brush terms: reaching deep into a bore or crevice is a diameter problem before it is a length problem. A thicker filament on a moderate trim pushes further in before the tips fold over.

Custom cleaning brushes requiring Galvanized Steel Wire for its mechanical, temperature, moisture or chemical behavior.

The applications that keep coming back to this grade:

• Chimney and Flue Soot Cleaning
• Tube & Pipe Cleaning
• Dust Removal

The constructions that usually carry it:

• Custom Tube & Pipe Bore Brushes

If the sample comes back rejected: Coating wear and chemical attack can expose the steel substrate; use stainless or another alloy where the environment exceeds galvanized-wire capability.

Send the brush type, filament diameter, free trim length, density, contact setting, wet or dry duty, working temperature and the actual cleaning chemistry together. Any one of them on its own leaves the stiffness undefined.

What usually goes wrong at this step:

• Selecting only by material name without defining diameter, trim, density, engagement and operating conditions

Reference standards behind the figures on this page: ISO 6892-1; ASTM E8/E8M; ASTM B117.

Source: Material manufacturer TDS / ISO / ASTM / industry reference — GALV-STEEL material property compilation. Structured values from update package; water absorption references ISO 62/ASTM D570 where applicable; UV references ASTM G154; remaining brush-process values marked.