AS/NZS 1163 C350L0 Structural Steel Tube | Galvanized RHS & SHS Steel Pipe Manufacturer
Royal Steel Group supplies AS/NZS 1163 C350L0 structural steel tubes designed for high-strength construction, infrastructure, and industrial applications. Manufactured according to Australian and New Zealand structural steel standards, C350L0 grade steel tubes offer excellent strength, durability, and weldability for demanding engineering projects.
With a minimum yield strength of 350 MPa and minimum tensile strength of 430 MPa, AS/NZS 1163 C350L0 is one of the most widely specified structural tube grades in Australia and international markets.
Available in black steel and hot-dip galvanized finishes, including DuraGal-style galvanized solutions, our structural tubes provide enhanced corrosion resistance for outdoor and exposed environments.
| Item | Specification |
| Product Name | AS/NZS 1163 C350L0 Structural Steel Tube |
| Standard | AS/NZS 1163 |
| Steel Grade | C350L0 |
| Yield Strength | ≥350 MPa |
| Tensile Strength | ≥430 MPa |
| Product Type | RHS / SHS / Structural Hollow Section |
| Surface Finish | Black, Hot-Dip Galvanized |
| Manufacturing Process | Cold Formed / Welded Steel Tube |
| Application | Structural Engineering, Construction, Infrastructure |
High Strength Structural Performance
AS/NZS 1163 C350L0 steel tube provides excellent mechanical properties for load-bearing structures. The high yield strength allows engineers to design strong and lightweight structures while maintaining safety and reliability.
Excellent Weldability
Designed for structural fabrication, C350L0 tubes offer good welding performance and are suitable for various fabrication methods, including:
MIG welding
Structural welding
Cutting and drilling
Custom fabrication
Superior Corrosion Protection with Galvanized Finish
For projects exposed to moisture, humidity, or coastal environments, galvanized C350L0 steel tubes provide additional protection against corrosion.
Hot-dip galvanized finishes are widely used for:
Outdoor steel structures
Solar mounting systems
Agricultural buildings
Infrastructure projects
Industrial applications
Galvanized structural tube is one of the most popular choices for Australian and Southeast Asian construction markets due to its excellent corrosion resistance and long service life.
Royal Steel Group supplies galvanized structural tubes suitable for applications requiring:
Long-term outdoor exposure
Low maintenance requirements
High structural strength
Better corrosion resistance
Cost-effective lifecycle performance
Our galvanized tubes can be supplied with customized zinc coating thickness according to project requirements.
Royal Steel Group provides AS/NZS 1163 C350L0 tubes in various structural profiles:
Square Hollow Section (SHS)
Suitable for:
Building columns
Structural frames
Machinery supports
Rectangular Hollow Section (RHS)
Suitable for:
Beams
Trusses
Industrial structures
Heavy-duty frameworks
Circular Hollow Section (CHS)
Suitable for:
Pipe structures
Columns
Architectural applications
C350L0 structural tubes are widely used across Australia, Southeast Asia, North America, and global construction markets.
Common Applications Include:
Steel Building Structures
Warehouse frames
Industrial buildings
Commercial construction
Steel workshops
Infrastructure Projects
Bridges
Road structures
Support frames
Public facilities
Solar & Renewable Energy Structures
Solar panel mounting systems
Solar farm structures
Outdoor support frameworks
Mechanical & Fabrication Projects
Equipment frames
Structural supports
Custom fabricated components
OEM LSAW & HSS Steel Tube Manufacturer
Royal Steel Group manufactures welded LSAW pipe and ASTM A500 HSS tubing—square, rectangular, and custom profiles—built to your drawings and specifications. From material sourcing to final container loading, we handle the full supply chain in-house.
Fabrication services:
Cut-to-length · precision drilling · end beveling · custom welding · hot-dip galvanizing · industrial painting · powder coating
One-stop sourcing for overseas buyers:
HSS square and rectangular tubing (ASTM A500 Grade B/C)
LSAW welded steel pipe (large-diameter, thick-wall)
Custom carbon steel profiles and OEM fabricated assemblies
Every order includes mill test reports (MTR), pre-shipment inspection, and export packaging with container loading plans. Standard orders ship in 15–25 days; custom fabrication runs quoted per project.
Send your drawings or specs—we'll return a detailed quote within 24 hours.
As a professional steel manufacturer and global supplier, Royal Steel Group provides reliable structural steel solutions for international construction projects.
Our Advantages:
Manufactured according to international standards
AS/NZS 1163 C350L0 steel tube supply
Hot-dip galvanized options available
Customized dimensions and specifications
Strict quality inspection before shipment
Competitive factory-direct pricing
Global export experience
We support customers from Australia, Southeast Asia, North America, and worldwide markets with high-quality structural steel products.
Packing:
Bundled with steel straps, waterproof protection, and clear labeling. Customized packing is available for galvanized and structural steel tubes.
Delivery:
Professional container loading, export documentation support, and worldwide shipping services ensure safe and efficient delivery to your project location.
1. What is AS/NZS 1163 C350L0 steel tube?
C350L0 is the grade most often specified for structural tube in Australia and New Zealand. It's a hollow section (round, square or rectangular) made to AS/NZS 1163, with a guaranteed minimum yield strength of 350 MPa and a tensile strength of 430 MPa. If you're building anything load-bearing from steel tube, this is what engineers usually write into the spec.
2. Is C350L0 suitable for outdoor applications?
On its own, no. Bare steel rusts. Hot-dip galvanize it (per AS/NZS 4680) and C350L0 is a common sight outdoors across Australia and New Zealand: fence posts, solar mounting frames, handrails. The zinc coat handles the weather; the grade handles the load.
3. What is the difference between C350L0 and standard carbon steel pipes?
The difference is what the standard guarantees. C350L0 is a structural grade: yield strength specified at 350 MPa minimum, and the L0 suffix adds a 0°C Charpy impact test requirement. A general-purpose pipe (say AS 1074) is specified for moving water or gas, not for being welded into a frame. You wouldn't build a column out of a water line, and you wouldn't run gas through a structural tube.
4. Can Royal Steel Group supply galvanized C350L0 tubes?
Yes. We supply C350L0 in black and hot-dip galvanized, in round, square and rectangular sections, and in the lengths and wall thicknesses your project calls for. Every order ships with the mill test certificate, traceable to AS/NZS 1163. Send us your sizes and we'll come back with a quote.
5. What industries use C350L0 structural tubes?
Broadly, any project that gets built from steel tube in Australia or New Zealand. The ones that come up most in our enquiries: steel construction, infrastructure, solar mounting systems, industrial fabrication, agricultural structures. If you're welding a frame, there's probably a C350L0 in it.
ROYAL STEEL GROUP
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