AS1163 C350L0


AS1163 C350L0

AS1163 C350L0 is a steel grade of hollow section steels specified in the AS/NZS 1163 standard. The nominal minimum yield strength of hollow sections is used to determine the grade classification (in MPa). The prefix “C” is used before the value of the nominal yield strength of the steel to indicate that the section is cold-formed. Only cold-formed structural steel hollow sections are covered by AS1163. Also, if the number is followed by a suffix “L0”, this steel grade must meet the impact test requirements. As a result, AS1163 C350L0 means cold-formed structural steel hollow sections with 350 MPa minimum yield strength, and it must meet the impact test requirements. To achieve such high yield strength in such thin-walled structures, special manufacturing processes are required, which makes them more expensive than other grades of steel. However, their superior strength and durability make them ideal for use in construction, especially in areas where high winds or seismic activity are a concern.

AS1163 is an Australian/New Zealand Standard that covers the requirements for cold-formed, electric resistance-welded, steel hollow sections used for structural purposes. It applies to structural hollow sections formed cold without subsequent heat treatment. The Standard considers three strength grades, with or without impact properties, that are suitable for welding. This Standard is important because it ensures that steel hollow sections used for structural purposes meet minimum requirements for strength, ductility, elongation, weldability, and fracture toughness. This Standard is essential for anyone who produces or uses steel hollow sections in structural applications. By ensuring that steel hollow sections used in construction meet these minimum requirements, AS1163 helps to ensure the safety and durability of buildings and other structures. As a result, this Standard plays an essential role in protecting the public from the potentially devastating consequences of construction failures.

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Since 1998, Tianjin United Steel Pipe Co., Ltd (TUSPIPE) has been committed to supplying high-quality steel pipes.

With over 500,000 tons annual production capacity, the company serves various fields and industries, such as oil & gas exploitation and transmission, ship & auto-building, water & electricity, environmental protection, mechanical engineering, infrastructure construction and etc.

TUSPIPE places a premium on product quality and rigorous product quality control. In order to maintain good product quality,  the company has established a Test & Inspection Center since 2004. With a series of state-of-the-art tests and inspection equipment, the test & inspection center is able to perform the tensile tests, hydro tests, impact tests, DWTT, etc.

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Dimensions and Sizes of AS1163 C350L0 Pipe


Chemical Composition of AS1163 C350L0 Pipes

The method of sampling from AS1163 C350L0 for chemical analysis of metals and alloys is critical to obtaining accurate and precise results. AS/NZS 1050.1 and ISO 14284 are the two most widely used methods for sampling metals and alloys, and both provide a high degree of accuracy. However, there are some key differences between the two methods. AS/NZS 1050.1 is a bulk method that involves taking a sample from the entire batch of material, while ISO 14284 is a selective method that involves taking a small number of samples from specific locations within the batch. Both methods have their advantages and disadvantages, but in general, AS/NZS 1050.1 is better suited for large batches of material, while ISO 14284 is better suited for small batches or when a more detailed analysis is required.

GradesChemical Composition of AS1163 C250L0 materials
(Cast or product analysis)            % max.
CSiMnPSCrMoAlTiMicro-alloying elementsCE

Mechanical Properties of AS1163 C350L0 Materials

AS1163 C350L0 materials are used in a variety of construction applications, from building structures to bridges. In order to ensure that these materials are up to the task, engineers subject them to a variety of tests. Tensile tests, impact tests, and flattening tests are all essential for measuring the mechanical properties of AS1163 C350L0 materials. These tests help determine the material’s ability to resist forces that can cause it to break or deform. The tensile test measures a material’s ability to withstand pulling forces, while the impact test measures its resistance to shattering forces. The flattening test, meanwhile, assesses a material’s ability to resist crushing forces. Each of these tests is essential for understanding the overall strength and durability of AS1163 C350L0 materials. By assessing the results of these tests, engineers can ensure that these materials will be able to perform as intended in a variety of applications.

- AS1163 C350L0 Tensile Test Requirements

AS1163 Tensile Test Requirements

- AS1163 C350L0 Charpy V-Notch Impact Test Requirements


The tolerances of AS1163 C350L0 Standard

AS1163 C350L0 cold-formed hollow sections are used in a variety of load-bearing applications. In order to ensure that they perform as intended, it is important to ensure that they meet the dimensional and mass tolerances given in the tables below. As can be seen, the tolerances are relatively tight, especially for mass. This is due to the fact that even small deviations from the nominal dimensions can lead to significant changes in performance. As a result, it is essential to verify that cold-formed hollow sections meet the tolerances given in the tables before using them in any load-bearing application. Doing so will help to ensure that they perform as intended and do not fail prematurely.

- AS1163 C350L0 Tolerance for Shape and Mass


- AS1163 C350L0 Tolerance on Length


AS1163 C350L0 and API 5L X42 Dual Specs Pipes

There is a large demand for dual spec pipes, such as materials in AS1163 C350L0 / API 5L X42 standards. We perform a variety of mechanical/chemical testing to show compliance with all two materials standards. API 5L and AS/NZS 1163 both require different test procedures to confirm compliance with tensile and fracture toughness parameters. Hydrostatic pressure tests and non-destructive weld inspection are also performed to demonstrate structural and pressure integrity.

– Properties Comparison

StandardAPI 5LAS/NZS 1163
Yield Strength (MPa)290350
Tensile Strength (MPa)414430
CommentsLongitudinal Test Direction < 219.1mm O.D.
Transverse Test Direction ≥ 219.1mm O.D.
Longitudinal Test Direction Aged for 15 mins at 150~200℃

– Tolerances Comparison

SpecificationsAPI 5LAS/NZS 1163
Thickness≤ 5.0mm ± 0.5mm± 10%
5.0 ~ 15.0mm ± 10%
≥ 15.0mm ± 1.5mm
Bevel Angle30°(+5°, -0°)Not Specified
Bevel Root Face1.6mm ± 0.8mm
End Squareness16.0mm max
Linear Mass0.02466t(D-t)
Piling Pipe
Hollow Section
show various kind of galvanized pipes
Galvanized Pipe
Steel Fabrication
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