AS1163 C450 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 C450 means cold-formed structural steel hollow sections with 450 MPa minimum yield strength, and no impact test required. This makes it an ideal choice for a variety of applications, such as beams, columns, trusses, and piping. Thanks to its high strength and formability, AS1163 C450 is a versatile material that can be used in a wide range of projects.
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 these products meet minimum standards, AS1163 helps to protect both consumers and producers from sub-standard products. In addition, the Standard helps to ensure that steel hollow sections are safe and fit for their intended purpose. As a result, AS/NZS 1163 is an important document that should be consulted by anyone involved in the production or use of steel hollow sections.
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Dimensions and Sizes of AS1163 C450 Pipe
|Outside Diameter||Thickness||Mass per Unit Length||Outside Diameter||Thickness||Mass per Unit Length|
|O . D .||W . T .||Weight||O . D .||W . T .||Weight|
|mm||mm||kg / m||mm||mm||kg / m|
Chemical Composition of AS1163 C450 Pipes
When conducting a chemical analysis of AS1163 C450 materials, it is important to use a reliable method of sampling in order to get accurate results. The method of sampling should be in accordance with AS/NZS 1050.1 or ISO 14284 in order to ensure that the results are accurate. The chemical composition should be determined in accordance with AS/NZS 1050 series Standards or other procedures that have the same, or better, degree of accuracy. This will ensure that the results of the chemical analysis are accurate and can be used to make decisions about the composition of the material being tested.
|Grades||Chemical Composition of AS/NZS 1163 C450 materials (Cast or product analysis) % max.|
|AS/NZS 1163 C450||0.2||0.25||1.7||0.03||0.03||0.3||0.35||0.1||0.04||0.15||0.43|
Mechanical Properties of AS1163 C450 Materials
AS1163 C450 materials are used in a variety of construction applications, and it is important to understand their mechanical properties to ensure that they will be able to perform as intended. Tensile tests, impact tests, and flattening tests are all essential for assessing the strength and durability of these materials. 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.
- AS/NZS 1163 C450 Tensile Test Requirements
|Grade||Minimum yield strength MPa||Minimum tensile strength MPa||Minimum elongation as a proportion of the gauge length of 5.65√S。( see Note )%|
|Circular hollow sections d0 / t||Rectangular hollow sections b / t , d / t|
|NOTE : These limits apply to the face from which the tensile test is taken . That is , for RHS , the use of b / t or d / t ratio is dependent on which face the test specimen is cut from . For SHS , there is only one ratio ( as b = d ).|
- AS/NZS 1163 C450 Charpy V-Notch Impact Test Requirements
|CHARPY V – NOTCH IMPACT TEST REQUIREMENTS|
|Grade||Test temperature ℃||Minimum absorbed energy , J|
|Size of test piece|
|10 mm x10 mm||10 mm x 7.5 mm||10mmx5mm|
|Average of 3 tests||Individual test||Average of 3 tests||Individual test||Average of 3 tests||Individual test|
|C250LO C350L0 C450LO||0||27||20||22||16||18||13|
The tolerances of AS1163 C450 Standard
AS1163 C450 is a set of standards for cold-formed hollow sections. The standards cover two main aspects: shape and mass tolerances, and length tolerances. As can be seen from the tables below, the tolerances are relatively tight, especially for mass. This is due to the fact that hollow sections are often used in load-bearing applications, and even small deviations from the nominal dimensions can lead to significant changes in performance. As a result, it is important to ensure that cold-formed hollow sections meet the tolerances given in the tables below. Doing so will help to ensure that they perform as intended and do not fail prematurely.
- AS/NZS 1163 C450 Tolerance for Shape and Mass
|Characteristic||Circular hollow sections||Square and rectangular hollow sections|
|External dimensions ( do , d and b )||±1%, with a minimum of ±0.5 mm and a maximum of ±10 mm||±1%, with minimum of ±0.5 mm|
|Thickness ( t )||For do ≤406.4 mm :±10% For do >406.4 mm :±10% with a max of ±2 mm||±10%|
|Out – of – roundness ( o )||±2% for hollow sections having a diameter to thickness ratio not exceeding 100( see Note 1)||–|
|Concavity / convexity ( see Note 2)||–||Max .0.8% or 0.5 mm , whichever is greater|
|Squareness of sides||–||90°±1°|
|External corner profile||–||See Table 5|
|Twist ( v )||–||2 mm +0.5 mm / m length|
|Straightness ( see Note 3)||0.20% of total length||0.15% of total length|
|Mass ( m ) per unit length||Not less than 0.96 times the specified mass ( Note 4) on individual lengths|
|NOTES : 1 Where the diameter to thickness ratio exceeds 100, the tolerance on out – of – roundness becomes the subject of agreement between the manufacturer and purchaser . 2 The tolerance on convexity and concavity is independent of the tolerance on external dimensions . 3 The straightness tolerance applies to straightness in any one plane . 4 In lieu of any other requirement , the specified mass is considered to be the nominal mass as noted in Clause 15.|
- AS/NZS 1163 C450 Tolerance on Length
|Type of length||Range mm||Tolerance|
|Random length||4000 to 16000 with a range of 2000 per order item||10% of sections supplied may be below the minimum for the ordered range but not less than 75% of the minimum|
|Mill ( or ‘ unspecified ‘) length||All||+100 mm -0|
|Precision length||<6000||+5 mm -0|
|≥6000≤10000||+15 mm -0|
|>10000||+5 mm +1 mm / m -0|
|NOTE : The enquiry and order shall indicate the type of length required and the length or length range , as appropriate . Alternatively , length tolerances shall be specified at the time of order .|
AS1163 C450 / API 5L X52 Dual Specs Pipes
There is a lot of demand for dual-spec pipes, like AS1163 C450 and API 5L X52 materials, which are in short supply. Mechanic and chemical tests are done to show that these materials meet these standards. API 5L and AS1163 each have their own set of tests that must be done to make sure they meet their own tensile and fracture toughness standards. Hydrostatic pressure testing and non-destructive weld inspection are also done to find out how strong and safe the structure is.