AS/NZS 1594:2002 pdf – Hot-rolled steel flat products

AS/NZS 1594:2002 pdf – Hot-rolled steel flat products.
2.2 STEEL-MAKING PROCESS
The steel shall be made by the basic oxygen process or an electric process. at the manufacturer’s option. Where lest certificates are supplied, they shall identify the steel- making process.
If analysis grades are required to he fine-grained, the steel-making practice shall ensure that the steel has a minimum soluble aluminium content of 0.010% or a minimum total aluminium content of 0.015%.
2.3 CHENIICAL COMPOSITION
2.3.1 General
The method of sampling for chemical analysis shall be in accordance with AS/NZS 1050.1. Chemical composition shall be determined by any procedures that are at least as accurate as those given in AS/NZS 1050 (all parts).
2.3.2 Cast analysis
Wherever possible a chemical analysis of the steel from each cast shall be made to determine the proportions of the specified elements. In cases where it is impracticable to obtain samples from liquid steel, analysis on test samples taken in accordance with AS/NZS 1050.1 maybe reported as cast analysis.
The reported cast analysis of the steel shall conform to the limits given in Tables 2.1 to 2.3 for the appropriate grade.
2.3.3 Product analysis (for analysis grades only)
For steels supplied in accordance with the cast analysis requirements of Table 2.1. the results of individual determinations carried out on the product shall be within the product analysis tolerance limits specified in Table 2.4. Where several determinations of a single element are carried out on products from any one cast, the spread of individual results shall not extend both above and below the range specified in Table 2.1.
2.3.4 11W carbon equivalent
The eqUation used for calculating 11W carbon equivalent shall he as follows:
11W CEQ = C + Mn/6 + (Cr + Mo + V)/5 + (Cu + Ni)/15
2.4 FREEI)ONI FRONI I)EFEC’I’S
The steel shall be free from pipe, harmful segregation, surface flaws and other defects detrimental to its use.
If, after acceptance of the steel and provided that it has been properly treated after delivery, subsequent processing reveals that it contains defects found to he detrimental, the steel shall he deemed not to comply with this Standard.
2.5 DIMENSIONAL TOLERANCES
Steel shall he supplied to the dimensional tolerances specified in AS/NZS 1365.
3.5 BFN[)TEST
MI steel shall be capable of meeting the bend test requirements of this Clause regardless of whether or not bend testing is specified. When a bend test is specified. the test piece shall he bent in accordance with AS 2505.1. at room temperature. through l80 around a mandrel of the appropriate diameter specified in Tables 3.3 and 3.4. The outer surface of the test piece shall not show any evidence of cracks.
NOTES:
I Small cracks at the edges of rectangular test pieces, and cracks which require magnification to be visible. may be disregarded.
2 Information on the recommended minimum bend radii to be used in the cold forming of hot- rolled flat products is given in Appendix C.
3.6 STRAIN-AGI IFNSILE i’IST (applicable to non-ageing grades only)
The susceptibility of the steel to strain ageing shall be determined in accordance with Appendix D. The material shall be deemed to pass the test if the increase in force required to re-initiate plastic strain after agcing is not more than 5% of the maximum force applied prior to ageing.