Metal Tubes

Metal tubes are hollow cylindrical or structural sections widely used across construction, fabrication, and engineering applications. Available in round, square, and rectangular profiles, they offer exceptional structural strength, support, and versatility for both industrial and DIY projects.

Steel tubing and mild steel tubes are among the most popular choices, valued for their durability and load-bearing capability. Beyond that, options in stainless steel and aluminium cater to a broad range of technical and aesthetic requirements.

RS New Zealand offers a comprehensive selection of metal tubing for sale in NZ, ideal for projects of every scale, from home improvements to large commercial fabrications.

Types of Metal Tubes

Metal tubes are available in a wide variety of shapes and materials, with each factor directly influencing performance.

By Shape

The cross-sectional shape of a metal tube determines how it distributes load, interfaces with other components, and performs across structural or mechanical applications.

Round tubes: The most widely used profile, round tubes suit fluid transport. Also, their uniform cross-section distributes stress evenly, making them a dependable choice for load-bearing roles.
Square tubes: With four equal sides and flat surfaces that simplify welding and joining, square tubes are well-suited to constructing frames, supports, and load-bearing structures across fabrication and construction projects.
Rectangular tubes: Offering strength and a broad, flat face, rectangular tubes are commonly used in structural builds and fabrications that require a stable surface for mounting, spanning, or fixing.

By Material

Material choice in metal tubes is equally important, as it governs strength, weight, and corrosion resistance across different environments.

Mild steel tubes: Easy to cut, weld, and shape, mild steel tubes are a cost-effective option widely used for structural frames, general fabrication, and construction projects that demand reliable strength.
Stainless steel tubes: Offering strong resistance to corrosion, stainless steel tubes perform well in food processing, marine, and chemical environments where durability and a clean, hygienic finish are essential.
Aluminium tubes: Considerably lighter than steel while still corrosion-resistant, aluminium tubes are well-suited to aerospace, vehicle, and structural projects where keeping overall weight to a minimum is a priority. Aluminium sheets are also a companion material, offering the same lightweight and corrosion-resistant properties in a flat profile.

Key Benefits of Metal Tubes

Metal tubes offer a compelling combination of strength, adaptability, and value, making them a preferred material across a broad range of industries and projects.

High strength-to-weight ratio: Steel tubing delivers impressive structural efficiency, supporting significant loads without excessive material bulk, which is particularly valuable in construction and fabrication.
Exceptional versatility: Metal tubes perform reliably across construction, manufacturing, engineering, and DIY applications, adapting to simple and highly complex project requirements.
Easy to work with: Metal tubes can be readily cut, welded, bent, and customised on-site, allowing fabricators and tradespeople to achieve precise results with minimal specialist equipment.
Wide range of sizes and finishes: Available in multiple dimensions, wall thicknesses, and surface finishes, there is a suitable option for virtually every technical specification.
Indoor and outdoor suitability: Depending on the material selected, metal tubes can withstand both sheltered and exposed environments, including harsh outdoor conditions.
Cost-effective solutions: Options like mild steel tubes remain some of the most economical structural materials available, offering excellent performance at a competitive price point for general use.

How to Choose the Right Metal Tube

Selecting the right metal tube requires careful consideration of several factors, as the wrong choice can compromise structural integrity, longevity, or project compliance.

Material type: The material you choose governs strength, weight, and resistance to corrosion. For example, mild steel suits general fabrication, while aluminium would be preferable where weight savings matter.
Shape and profile: The cross section of the tubes depend on structural or design needs. For instance, round tubes work well for mechanical and fluid applications, while square and rectangular profiles are better suited to structural frames and load-bearing assemblies.
Dimensions: Outer diameter, wall thickness, and length should all be matched to the load requirements and spatial constraints of your application to ensure safe and efficient performance.
Finish and coating: Galvanised tubes offer greater protection in outdoor or moisture-prone environments, whereas untreated options are sufficient for sheltered, indoor applications.
Grades and standards: Material grades classify a metal's composition and mechanical properties. Confirming that your chosen tube meets the relevant engineering or safety standards helps ensure it performs as required for the job.
Intended application: Consider whether the tube is needed for structural support, decorative purposes, mechanical assemblies, or general fabrication, as each use case carries different performance demands.

Applications of Metal Tubes

Metal tubes are a foundational material across a wide range of industries, valued for their structural reliability, adaptability, and availability in multiple materials and profiles.

Structural frameworks: Steel tubing forms the backbone of buildings, industrial structures, and infrastructure projects, providing the load-bearing capacity and rigidity required for safe, long-term construction.
Furniture and shopfitting: Square and rectangular metal tubes are widely used in the manufacture of shelving, display units, and commercial furniture, combining strength with a clean, modern aesthetic.
Automotive and transport: Metal tubes play a critical role in roll cages, exhaust systems, chassis components, and vehicle frames, where reliable performance under stress and vibration is essential.
Handrails, gates, and fencing: Round and square tubes are the preferred choice for fabricating handrails, security gates, and perimeter fencing, offering structural dependability and a professionally finished appearance.
Industrial fabrication: Across manufacturing and engineering environments, mild steel tubes are used to construct machinery guards, support structures, conveyors, and bespoke fabricated components.
DIY and general repairs: Metal tubes are a practical and cost-effective choice for home improvement tasks and general repairs in NZ, such as building garden frames, reinforcing structures, and creating custom fixtures.

Buy Metal Tubing Online from RS New Zealand

RS New Zealand is a trusted supplier and distributor of metal materials, including a comprehensive range of metal tubes for sale. Products are sourced from reputable brands, such as Rose Krieger and RS PRO, ensuring reliable quality across every order.

For broader material requirements, complementary options like steel rods and metal sheets are also available to cover all structural and fabrication needs.

Browse the full range of metal and aluminium tubing our online store and have your order delivered directly to your door in NZ. With flexible and swift delivery options, we ensure you receive your items when you need them.

For more information on delivery times and fees, please visit our delivery information page.