Electro Galvanized Steel Strand 1x7 2.0-4.0mm Bright Smooth Messenger Wire

Electro galvanized steel strand, 1x7, 2.0mm to 4.0mm, for light messenger and tensioning work where a clean bright finish counts.

Electro galvanizing and hot dip galvanizing are different processes with different results, and confusing them causes most of the complaints we hear about thin coatings. Electro plating deposits a thin, very uniform zinc layer that leaves a bright surface and does not change the wire diameter appreciably. Hot dip gives a much thicker coating but a duller, slightly irregular surface.

For an indoor messenger, a display tension wire or a small telecom strand, the electro product is usually the right answer: dimensionally precise, bright, and clean in the hand. What it is not is a coating for coastal or buried service. We say that plainly, because a buyer who expects twenty years outdoors from a twenty gram coating will be disappointed whoever supplied it.

• Bright uniform finish: The plated surface is visually consistent from one end of the reel to the other, which is why this strand ends up in visible applications such as display tensioning and light architectural runs.
• Diameter held to a tight band: Because plating adds almost no thickness, the finished diameter matches the drawn wire closely. On a strand feeding a fixed pulley or a close tolerance ferrule, that matters more than coating mass.
• Clean handling, no zinc dust: Hot dip strand can shed loose zinc particles on the hands and on the product. Electro plated strand handles clean, which is a practical advantage on installation sites with finished goods nearby.
• Right for indoor and sheltered duty: Twenty to forty grams per square metre is a light coating. Under a roof, inside a duct or in a dry interior it performs perfectly well for many years if the ends are sealed.
• Small sizes down to 2.0mm: Fine strand is where 1x7 construction is at its best, and where hot dip coating thickness becomes a significant proportion of the wire diameter. The plated product avoids that problem entirely.
• Honest service expectation: We publish the coating mass and say where it should not be used. That is more useful to a buyer than a claim that the product is suitable for everything.

Typical use is indoor messenger and support strand for light cable, display and lighting tensioning where the wire is visible, and small tension lines in equipment and furniture where a clean finish is expected.

It is also used inside ducts and cabinets as a pull and support strand, and in sheltered telecom installations where the environment is dry and the priority is dimensional consistency rather than decades of weather resistance.

• Indoor messenger for light cable and wiring
• Display, signage and lighting tension wire
• Sheltered telecom support strand
• Equipment and furniture tension lines
• Duct and cabinet pull and support strand

Coating mass is verified by stripped weight per lot, and adhesion is checked by a wrap test around a mandrel of the specified diameter. A plated coating that flakes on wrapping will flake in service at every bend, so the wrap test is a practical production check rather than a formality.

Diameter is measured with a laser gauge on the finished strand at three points per reel, and breaking load is tested per lot. Bright plated strand shows handling marks easily, so reels are inspected for surface scuffing before packing.

Plywood reels or coils of 1000m to 5000m, wrapped in paper then VCI film to keep the bright finish from damp during shipment. Reels are marked with size, length, coating type and lot number, and we avoid metal strapping in direct contact with the strand.