Steel wire questions, answered.

Hot dip galvanizing passes the wire through molten zinc, which leaves a thick, metallurgically bonded coating — typically 25–70 GSM on the GI wire we trade. It is the choice wherever the wire lives outdoors: fencing, gabions, highway and agricultural use. Cold dip (electro) galvanizing deposits a thinner, very even layer electrolytically, giving a brighter, cleaner finish at lower coating weight. It suits indoor, sheltered or finish-critical work rather than long exposure. As a rule: hot dip for service life, cold dip for appearance and tighter dimensional tolerance.

SWG is the Standard Wire Gauge. The number counts down as the wire gets thicker — 8 SWG is a heavy 4.06 mm wire, 20 SWG a fine 0.91 mm one. Buyers outside India often work in millimetres, so send whichever you have and we will match it. The conversion table further down this page covers the gauges that appear in our product specifications.

GSM is grams of zinc per square metre of wire surface — the honest measure of how long a galvanized wire will last, far more telling than the word “galvanized” on its own. Higher GSM means more zinc and a longer life before red rust. Light-duty and sheltered work is often specified around 25–50 GSM; exposed fencing, coastal sites and anything expected to stand for years is usually specified at 70 GSM and upward. Tell us the environment and the service life you need and we will quote a coating weight against it.

We do not publish a fixed minimum. What is workable depends on the product, the gauge and where it is going — a domestic road consignment and a full export container are quoted very differently. Send the quantity you actually need and we will tell you straight away whether it is workable and what it costs.

Yes. SDI Steels arranges export consignments on enquiry, and has traded to the UAE, Sri Lanka, Kenya, Ghana, Oman and Nepal. Other destinations are quoted on enquiry. We are a registered MSME enterprise and a member of EEPC India, the Engineering Export Promotion Council.

Barbed wire is two line wires twisted together with barbs set at intervals — the standard, economical boundary for agriculture, highway and railway land. Concertina (razor) wire is a different class of product: sharpened blades crimped onto a high-tensile core wire and formed into coils that expand along a line or across a wall top. It is a deterrent rather than a boundary marker, and is what gets specified for installations, depots and high-security perimeters. Many sites use both — barbed wire for the run, concertina on top.

Chain link is woven into a diamond pattern, so it flexes, follows uneven ground and covers a long boundary at the lowest cost per square metre — the usual answer for plot, ground and compound fencing. Welded wire mesh is welded at every intersection into a rigid flat sheet or roll: it holds its shape, will not be pushed out of line, and is what you want for animal enclosures, gabion work, machine guarding and concrete reinforcement. Chain link for boundary length; welded mesh for rigidity.

Wire coils are packed in plastic film and woven cloth as standard. Coil weight varies by line — 70–150 kg for hot dip GI wire, 25–60 kg for MS binding wire, and 22–50 kg bundles for barbed wire, which can also go out as naked coils, in brand paper or boxed. Export consignments are packed for the voyage and palletised where the product and destination call for it. Specific coil weights are confirmed at the time of order.

Payment is by LC, TT, or as mutually agreed. Lead time depends on the product, the quantity and whether the specification is a standard range or a sourced one, so it is confirmed with the quote rather than promised in advance. An order runs enquiry → sourcing → docketing → delivery, with the order papers, packing detail and dispatch documents prepared and shared from our Raipur office.

Send the standard, the drawing or the specification sheet you are working from. The ranges published on this site are the standard industry figures for each line; grades, gauges and coating weights outside them are sourced on enquiry. Exact figures are always confirmed against your order rather than assumed from the website.

PVC coated wire is produced in a range of colours — green and black are the volume sellers for fencing and garden work, with other shades available. Tell us the colour, the core gauge and the finished diameter you need, and the quantity, and we will confirm what can be matched.

Both. SDI Steels trades — sourcing and supplying against your specification across our wire and fencing lines — and works as a contract manufacturer, producing to specification under our own SDI STEELS brand and under customers' own labels. What we are not is a single mill with one fixed output: production is placed where the gauge, the coating weight and the volume are best met. For a buyer that means a specification gets matched rather than approximated to whatever one plant happens to run.

Yes — that is contract manufacturing, and it runs across all product lines. Send the specification, the coating weight, the packing and the marks or label you need, along with the volume and where it is going. We come back with what is workable, the price and the lead time. Domestic and export both.