Steel Wire & Materials for Power, Energy and Infrastructure
Zhongbo manufactures galvanized steel cable-armour wire and steel strip used to armour and reinforce power transmission, distribution and control cables — from low-voltage building cables to high-voltage grid and submarine cables. This is our core manufacturing output.
Beyond armouring wire and strip, Zhongbo also supplies selected cable materials (conductor, insulation, shielding and sheathing compounds) and metal materials (steel, aluminium and copper in standard product forms) for power, energy and infrastructure projects, sourced from confirmed mills with grade, origin and documentation agreed per order.
The power and energy sector places demanding requirements on every component in a cable system. An under-specified armouring wire shortens cable life; a supplied material with wrong grade or certification gaps creates project risk. Zhongbo addresses both: manufacturing the armouring wire in-house to a controlled specification, and handling the supply chain discipline for the broader cable and metal materials so buyers have one point of contact with a clear account of what is made and what is sourced.
Challenges in power, energy & infrastructure
Power and energy projects require materials that perform for decades under mechanical, thermal and environmental stress. The recurring procurement challenges:
- Armouring wire that does not meet the coating weight or tensile class specified in the cable standard, shortening mechanical protection life.
- Steel strip for flat-wire armouring supplied without consistent width, thickness and coating tolerances, causing cable lay-up problems.
- Cable material supply (conductor, insulation, shielding, sheathing) where mill identity, grade and standard conformance are poorly documented — a certification gap that can hold up project acceptance.
- Metal material supply (structural steel, aluminium, copper) for substation, tower or infrastructure use where provenance and grade confirmation are required by the EPC or owner.
- Coordinating multiple suppliers for armouring wire, cable materials and structural metals, each with different lead times and documentation formats.
Manufactured: galvanized cable-armour wire and steel strip
Galvanized steel cable-armour wire is Zhongbo's primary manufacturing product for the power and energy sector. Drawn from low-carbon steel rod and hot-dip galvanized to a controlled coating weight, it provides the mechanical protection layer in round-wire armoured (RWA) power cables — from low-voltage distribution cables to high-voltage transmission and submarine cables.
Steel strip for flat-wire armouring (SWA and FSWA) is also manufactured in-house, in widths and thicknesses to the cable designer's specification. Coating, width, thickness and edge condition are controlled per batch and documented. Both armouring wire and strip are covered by mill test certificates on every order.
- Round-wire armouring wire — galvanized, 1.25–5.0 mm, various coating classes
- Steel strip for flat-wire armouring — widths and thicknesses to order
- Manufactured to ASTM A641, EN 10244-2, BS EN 10257 or buyer specification, subject to confirmation
- Mill test certificates covering diameter / dimensions and zinc-coating weight per batch
- Temper and tensile class to cable standard requirement
Also supplied for power & energy projects
Beyond the armouring wire and strip made in-house, Zhongbo supplies selected cable materials (conductor, insulation, shielding and sheathing) and metal materials (steel, aluminium and copper in standard product forms) for power cable manufacture, grid construction and infrastructure work. These are not manufactured by Zhongbo — they are sourced from identified mills, with grade, standard, origin and mill documentation confirmed per order. Zhongbo represents itself as the supply and documentation contact, not the manufacturer of these materials.
Each supplied category is a portfolio in its own right, with its own product range and enquiry checklist. Browse the full catalogue and the supply-and-documentation model on the dedicated pages:
Standards & compliance
Galvanized steel cable-armour wire is manufactured and tested to ASTM A641, EN 10244-2 or BS EN 10257 (or a buyer-specified cable standard), subject to confirmation of the applicable class and coating weight requirement. Steel strip for flat-wire armouring is produced to dimensional and coating tolerances confirmed against the cable specification. For supplied cable materials and metal materials, the applicable grade, standard and origin are confirmed per order; Zhongbo does not manufacture these materials but sources them from identified mills and provides the mill documentation the project requires.
Why power, energy & infrastructure buyers choose Zhongbo
Power cable makers, EPC contractors and infrastructure project teams work with Zhongbo because both sides of the portfolio — manufactured and supplied — come with clear documentation and a single accountable contact. What sets the offering apart:
- In-house manufacture of galvanized steel armouring wire and steel strip: coating weight, tensile class and dimensional tolerances controlled and documented per batch.
- Armouring wire available for round-wire armouring (RWA) and steel strip for flat-wire armouring (SWA / FSWA) to match the cable design.
- Supplied cable materials (conductor, insulation, shielding, sheathing) sourced from confirmed mills, with grade, standard and origin agreed and documented before shipment.
- Supplied metal materials (steel, aluminium, copper) in structural product forms — bar, plate, pipe, strip, profiles — for grid, substation and infrastructure applications, with provenance confirmation per order.
- A single point of contact covering both manufactured and supplied materials, reducing coordination effort and documentation risk on complex projects.
Specifications
| Armouring wire diameter | 1.25 – 5.0 mm (verify for cable design) |
| Armouring wire coating | Hot-dip galvanized, coating class to standard or order |
| Strip width / thickness | To cable specification, confirmed per order |
| Armouring wire standards | ASTM A641, EN 10244-2, BS EN 10257 — subject to confirmation |
| Supplied materials | Cable materials and metal materials — grade, standard and mill confirmed per order |
Frequently Asked Questions
Does Zhongbo manufacture the cable-armour wire or just supply it?
Zhongbo manufactures galvanized steel cable-armour wire and steel strip in-house. Cable materials (conductor, insulation, shielding, sheathing) and metal materials for infrastructure are supplied from confirmed mills — Zhongbo is the supply contact, not the manufacturer of those materials.
Which armouring wire standards do you work to?
We manufacture and test to ASTM A641, EN 10244-2 or BS EN 10257, or to a buyer-specified cable standard, subject to confirmation of the coating class and tensile requirement. Send your cable standard and we will confirm which class applies.
Can you supply both round-wire and flat-wire (strip) armouring?
Yes. We manufacture round-wire armouring in galvanized wire and steel strip for flat-wire armouring (SWA / FSWA), both with dimensional and coating documentation per batch.
What documentation comes with supplied cable materials?
For each supplied cable material, we confirm mill identity, grade, standard and origin before order placement and provide the mill test documentation — test report or certificate of compliance — that the project requires. Documentation scope is agreed at the enquiry stage.
Can you supply materials for renewable energy cable projects?
Yes. For wind, solar and battery-storage projects, we supply armouring wire manufactured in-house and source cable and structural metal materials from confirmed mills with full documentation, following the same model as grid and infrastructure orders.
How do I request armouring wire samples or a trial order?
Send your cable standard, armouring wire diameter, coating class and quantity and we will confirm the specification, lead time and sample availability. Mill test certificates are provided with every batch.