In industries where reliability and durability are non-negotiable, galvanised steel wire braid cables play a vital role. Often referred to as GSWB cables, these designs incorporate a braided layer of galvanised steel wire to provide enhanced mechanical protection, flexibility and resistance to demanding environments. From construction and manufacturing to automotive and offshore applications, their versatility makes them a dependable choice across a wide range of sectors.
This guide explores what galvanised steel is, how galvanised steel wire braid cables are constructed, and where they are best used, giving you a clear, practical understanding of their role in modern cable design.
What is galvanised steel?
Galvanised steel is steel that has been coated with a layer of zinc to protect it from corrosion. The most common method is hot-dip galvanising, where the steel is submerged in molten zinc to create a durable, bonded coating. This protective layer acts as a barrier against moisture and oxygen, significantly reducing the risk of rust. As a result, galvanised steel is widely used in environments where long-term exposure to the elements is expected.
Typical applications include:
- Cable reinforcement, including galvanised steel wire braid cables
- Structural components such as beams and supports
- Automotive parts including frames and underbody elements
- Fencing, gates and outdoor fixtures
- Pipework for water and gas systems
- Household and industrial appliances
Key benefits of galvanised steel
Galvanised steel remains a popular material choice for several reasons:
Corrosion resistance
The zinc coating protects the underlying steel from moisture and oxygen, significantly extending its lifespan.
Durability
It performs well in harsh conditions, including rain, humidity and coastal environments.
Self-healing properties
If the coating is scratched, the zinc continues to protect the exposed steel through cathodic protection.
Cost-effectiveness
Compared to alternative coatings, galvanising offers long-term protection with minimal maintenance.
What are galvanised steel wire braid cables?
Galvanised steel wire braid cables are electrical or mechanical cables that feature a braided outer layer of galvanised steel. This braid acts as a protective barrier, improving resistance to abrasion, impact and environmental exposure.
They are often used in applications where both flexibility and mechanical protection are required. This is something that’s not always achievable with more rigid armouring methods. In many designs, the braid works alongside internal wire insulation, ensuring both electrical performance and physical protection are maintained.
Benefits of galvanised steel wire braid cables
These cables are designed to perform in challenging conditions. Key advantages include:
Corrosion resistance
The galvanised braid protects against rust, making these cables suitable for outdoor, marine and chemically exposed environments.
Mechanical strength
The braided construction provides excellent resistance to abrasion, crushing and general wear.
Flexibility
Unlike more rigid cable designs, the braid allows for movement – ideal for dynamic applications or tight installation spaces.
Protection of internal components
The braid shields conductors and inner layers, including any custom wire insulation, from mechanical stress and environmental damage.
EMI shielding
The steel braid can help reduce electromagnetic interference, improving signal integrity in sensitive systems.
Temperature resistance
These cables can withstand elevated temperatures, making them suitable for use near heat-generating equipment.
Chemical resistance
They perform well in environments where exposure to oils, fuels or mild chemicals is expected.
Longevity
Their combined resistance to corrosion and damage reduces maintenance and replacement costs over time.
Versatility
Suitable for both static and dynamic applications across a wide range of industries.
Improved safety
The braid can provide a grounding path and reduce the risk of electrical faults in certain installations.
UV resistance
Well-suited for prolonged outdoor use where UV exposure is a concern.
Common applications
Thanks to their robust yet flexible design, galvanised steel wire braid cables are used across many sectors:
Industrial machinery
Protecting power and control cables in environments with vibration, movement and mechanical wear.
Automotive and aerospace
Used where resistance to heat, movement and physical damage is essential.
Construction and infrastructure
Common in lifts, cranes and outdoor installations exposed to the elements.
Marine and offshore
Ideal for saltwater environments where corrosion resistance is critical.
Energy and utilities
Used in wind farms, refineries and power generation systems.
Telecommunications
Providing shielding and protection for sensitive data and signal cables.
Mining and tunnelling
Withstanding abrasive, high-impact conditions underground.
Defence applications
Offering durability and reliability in extreme environments.
Fire and emergency systems
Maintaining performance under elevated temperatures.
Agricultural machinery
Protecting wiring in harsh, outdoor working conditions.
Robotics and automation
Balancing flexibility with mechanical protection in moving systems.
GSWB vs SWA cables: What’s the difference?
Galvanised steel wire braid (GSWB) and steel wire armoured (SWA) cables are often compared, but they serve different purposes. GSWB cables use a braided construction, which makes them lighter and more flexible. This makes them well suited to applications involving movement or tight routing. SWA cables, on the other hand, use a layer of steel wires arranged in a rigid formation around the cable. This provides superior mechanical protection, but at the expense of flexibility. As a result, SWA cables are typically used for fixed installations such as underground power distribution.
In simple terms:
- Choose GSWB for flexibility and movement
- Choose SWA for maximum mechanical protection in static installations
How are galvanised steel wire braid cables made?
The manufacturing process involves several key stages:
1. Wire drawing
Steel rods are drawn into fine wires to the required diameter, ensuring consistency and strength.
2. Galvanisation
The wire is cleaned and coated in zinc, typically through hot-dip galvanising, to provide corrosion resistance.
3. Braiding
Multiple wires are interwoven using specialised machinery to form the braid. The pattern and tension are carefully controlled to balance strength and flexibility.
4. Cable assembly
The braid is applied over the cable core, which may include conductors and layers of wire insulation tailored to the application.
5. Testing and inspection
Finished cables undergo checks for strength, flexibility, and where applicable, electrical performance.
6. Customisation
Additional coatings or bespoke insulation solutions can be applied depending on environmental or technical requirements.
Choosing the Right Cable for the Job
Galvanised steel wire braid cables offer a practical balance between strength, flexibility and environmental resistance. Their ability to perform reliably in demanding conditions makes them a trusted choice across industries. Whether you’re specifying cables for industrial machinery, infrastructure or specialist equipment, understanding how these cables are constructed and where they perform best can help ensure long-term reliability and performance.When it comes to cables, we’re the experts. To learn more about all the different types of cables, their benefits and uses, you can find more resources and information on our blog, or get in touch with our helpful team today for expert advice.