AS 1163 Specifications

erw carbon steel pipe

AS 1163 is the Australian/New Zealand Standard for Cold-formed structural steel hollow sections. This Standard specifies the requirements for the production and supply of cold-formed, electric resistance-welded, steel hollow sections used for structural purposes.

The standard AS 1163 classifies steel pipes into several levels, and each level is distinguished according to its mechanical properties and chemical composition. These grades cover C250, C350, C450, etc., where values are used to indicate that the material meets or exceeds its minimum yield strength (expressed in megapascals).

AS 1163 Products

List of Manufacturer-Steel Pipe/Tube

AS 1163 C250

AS1163 C250 represents cold-formed structural steel hollow sections with 250 MPa minimum yield strength, and no impact test required.

AS 1163 C250L0

AS 1163 C250L0

C250L0 hollow sections are frequently used in construction, as they offer good strength and resistance to impact forces. But not suitable for use in high-stress applications.

AS 1163 C350

AS 1163 C350

AS1163 C350 means cold-formed structural steel hollow sections with 350 MPa minimum yield strength. It is an essential material in today’s construction industry.

AS 1163 C350L0

AS 1163 C350L0

their superior strength and durability make them ideal for use in construction, especially in areas where high winds or seismic activity are a concern.

AS 1163 C450

AS 1163 C450

Thanks to its 450 MPa minimum yield strength high strength and formability, AS1163 C450 is a versatile material that can be used in a wide range of projects.


AS 1163 C450L0

AS1163 C450L0 assures that it is a high-quality steel grade that can be used in various structural applications.

Each grade of steel pipe is carefully designed to meet specific engineering requirements and load standards, ensuring the stability and robustness of the building structure.

AS 1163 Specifications

1.AS1163 Hollow Section Description

Type: Welded
Length: 5.8~12m; Can be customized according to customer needs.
Wall thickness: 4.5~16 mm
Rectangular Hollow Section: 50 * 20 * 1.6 mm – 250 * 150 * 9.0 mm
Square Hollow Section: 20 * 20 * 1.6 mm – 250 * 250 * 9.0 mm
Circular Hollow Section: 13.5 * 2.3 mm – 610 * 12.7 mm
Surface Treatment:
1. Oiled;
2. Color painted;
3. Powder painted.
End Treatment:
1.Plain end;
3.Threaded. It is usually double-threaded, with a coupling at one end and a plastic cap at the other end.
Package: Standard export, bulk/bundled/nylon bag, suitable for Marine packing.
Application: Construction steel structure; bridge construction; road paving; building pile foundation, furniture, etc.

2.Mechanical Properties

Tensile test, impact test and flattening test are particularly important tests for the mechanical properties of AS1163 materials. These tests help determine the resistance of the material to forces that can cause it to break or deform.

Tensile testing measures a material’s ability to withstand tension, while impact testing measures its ability to resist crushing forces. At the same time, the crushing resistance of the material was evaluated by flattening test.

Steel grade C250 C250L0 C350 C350L0 C450 C450L0
Yield strength min. (MPa) 250 250 350 350 450 450
Tensile strength (MPa) 320 320 430 430 500 500
Elongation A % min. 22 22 20 20 16 16
Impact energy 0 ℃ KV J min.
Individual test 20 20 20 20 20 20
Average of three tests 27 27 27 27 27 27

Manufacturing Process of AS 1163 Steel Pipe

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The journey of AS 1163-compliant steel pipes involves a meticulous manufacturing process.

Material Selection:

The process begins with the selection of high-quality steel that adheres to the specific requirements of AS 1163, ensuring optimal chemical properties and mechanical strength.

As per the AS 1163 standard, sampling methods for chemical analysis must be in accordance with AS/NZS 1050.1 or ISO 14284. 

For chemical composition, please

The product AS 1163 analysis tolerances are shown in the table below:

Element Tolerance over maximum limit
Carbon 0.02
Silicon 0.05
Manganese 0.1
Phosphorous 0.005
Sulphur 0.005
Chromium 0.05
Nickel 0.05
Molybdenum 0.03
Copper 0.04
Aluminium (total) -0.005
Micro-alloying elements (niobium and vanadium only) for Grades C250, C250L0 0.06 with niobium no greater than 0.020
Micro-alloying elements (niobium, vanadium and titanium only) for Grades C350, C350L0,C450, C450L0 0.19 with vanadium no greater than 0.12
as 1163

Forming and Welding:

AS 1163 advanced manufacturing techniques are employed for forming and welding, guaranteeing precise shapes and robust weld integrity. This is fundamental to meeting the AS 1163 structural requirements outlined in the specifications.

AS 1163 finished hollow profiles should be manufactured using a cold forming process and joined at the strip edges using resistance welding techniques. The welds should be longitudinal and the external liner should be removed. There should be no subsequent integral heat treatment of the AS 1163 finished product.

AS 1163 Heat Treatment:

AS 1163 may necessitate heat treatment processes based on application and specifications. This enhances the mechanical properties of the steel, ensuring optimal performance under various conditions.

Prior to the tensile or impact test, the AS 1163 specimens shall be heated to between 150°C and 200°C and aged for not less than 15 minutes.

If it is intended to reheat these grades above 620°C, the buyer should discuss the application and proposed reheating treatment with the manufacturer.

AS/NZS1163 Pipe Surface Treatment

To enhance the corrosion resistance of the steel pipe and extend its service life, the surface treatment of the steel pipe is also clearly specified in the AS 1163 standard. This may involve coating, plating, or other surface treatment in order to protect the steel pipe from the external environment.

Inspection and Testing of AS 1163

AS 1163, the production of steel pipes must be subject to a full range of quality checks, including but not limited to dimensional accuracy, testing of mechanical properties, analysis of chemical composition, quality of welded joints and surface conditions.

 In addition, in order to ensure that there are no defects inside the product, it is necessary to carry out regular non-destructive testing, such as ultrasonic testing, X-ray or magnetic particle testing.

AS1163 Certification and Marking

Finally, the steel pipe that has passed the corresponding certification AS 1163 standard needs to be marked on the product with information such as the manufacturer, standard number, material type and batch number for traceability and identification.

The AS 1163 specification is a core standard in the Australian steel pipe and structural steel industry, which ensures the expected quality and function of the product by setting strict production and inspection criteria. Whether you are an engineer, architect or contractor, understanding and adhering to this code is always an important step in ensuring the successful execution of a project.

Technology continues to advance and the market continues to evolve, the AS 1163 specification is expected to continue to play a key role in ensuring structural safety and improving engineering quality.

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