As per the AS1163 standard, sampling methods for chemical analysis must be in accordance with AS/NZS 1050.1 or ISO 14284. This is to ensure that the results of the analysis are accurate. The accuracy of the results is essential in order to make decisions about the quality of the product. AS/NZS 1050 series Standards or other procedures that achieve the same, or better, degree of accuracy must be used in order to determine the chemical composition. This is because it is important to have reliable information about the chemical composition in order to make decisions about the safety and quality of the product.
| Grades ( see Note 1) | Chemical composition ( cast or product analysis )( see Note 2)% max . | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Mo | Al ( see Note 3) | Ti | Micro – alloying elements | CE ( see Note 4) | |
| C250,C250L0 | 0.12 | 0.05 | 0.5 | 0.03 | 0.03 | 0.15 | 0.1 | 0.1 | 0.04 | 0.03( see Note 5) | 0.25 |
| C350,C350L0 | 0.2 | 0.25 | 1.6 | 0.03 | 0.03 | 0.3 | 0.1 | 0.1 | 0.04 | 0.15( see Note 6) | 0.43 |
| C450,C450L0 | 0.2 | 0.25( see Note 7) | 1.7 | 0.03 | 0.03 | 0.3 | 0.35 | 0.1 | 0.04 | 0.15( see Note 6) | 0.43 |
| NOTES : 1 The use of sulphide modification manufacturing techniques for these grades is permitted . 2 The following elements may be present to the limits stated : ( a ) Copper 0.25%. ( b ) Nickel 0.25%. 3 Limits specified are for soluble or total aluminium . 4 Carbon equivalent ( CE ) is calculated from the following equation : | |||||||||||
5 Applies to niobium and vanadium only . However , niobium greater than 0.010% is not permitted .
6 Applies to niobium , vanadium and titanium only . However , vanadium greater than 0.10% is not permitted .
7 For circular hollow sections ( CHS ), the silicon limit shall be 0.45.
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