ISO 15208 pdf download – Continuous hot-dip zinc-coated twin-roll cast steel sheet of commercial quality

ISO 15208 pdf download – Continuous hot-dip zinc-coated twin-roll cast steel sheet of commercial quality.
5.10 Dimensional and shape tolerances
5.10.1 Dimensional and shape tolerances applicable to zinc-coated twin-roll cast steel sheet shall be as given in ISO 16163. The tolerances for thickness apply to products whose thickness is a combination of base-metal and coating thickness.
5.10.2 When the base-metal thickness is specified, the thickness tolerances of ISO 16163 shall apply to the product thickness, as calculated in accordance with AnnexA6 Sampling
6,1 TensIle test
When required, one representative transverse sample from each lot of SO t or less for shipment shall he taken for the tensile test to verify conformance with the requirements of 54. fransverse test pieces shall be taken mid-way between the centre and the edge of the sheet as-rolled.
6.2 Coating tests
6,2.1 Coating mass
6.2.1.1 The producer/manufacturer shall develop a testing plan with a frequency sufficient to adequately characterize the lot of material and ensure conformance with specification requirements.
6.2.1.2 The purchaser may conduct verification tests by securing a sample piece of approximately
300 mm in length by the as-coated width and cutting three test specimens, one from the mid-width position and one from each side not closer than 25 mm from the side edge. The minimum area of each specimen shall be 1 200 mm2.
6.2,2 Triple-spot test
The triple-spot test result shall be the average coating mass found on the three specimens taken in accordance with 6.2.1
6.2.3 Single-spot test
The single-spot test result shall be the minimum coating mass found on any one of the three specimens used br the triple-spot test. Material, which has been slit from wide coil, shall be subjected to a single- spot test only.
9 Retests
9.1 Machining and flaws
If any tensile test piece shows defective machining or develops [laws, It shall be discarded and another test piece shalt be substituted.
9.2 Elongation
On any tensile test, if any part of the fracture is outside the middle half of the gauge length as scribed before the test, the test shall be discarded and a retest carried out.
9.3 Additional tests
II any test does not give the specified results, two additional tests shall be conducted on samples selected at random from the same tot. Both retests shall conform to the requirements of this document; otherwise, the lot shall be rejected.
10 Resubmission
10.1 The manufacturer may resubmit, for acceptance, the products that have been rejected during earlier inspection because of unsatisfactory properties, after the rejected products have been subjected to a suitable treatment (e.g. selection, heat treatment), which on request, will be indicated to the purchaser. In this case, tests shall be carried out as if they applied to a new lot.
10.2 The manufacturer may present the rejected products to a new examination for contormity with the requirenlents for another quality.
11 Workmanship
1 1.1 The surface condition shall be that normally obtained for a zinc-coated twin-roll cast steel sheet product.
11.2 The steel sheet in cut lengths shall be free from quantities of laminations, surface flaws and other imperfections that arc detrimental Lu the final product or to subsequent appropriate processing.
11.3 Processing for shipment in coils does not afford the manufacturer the opportunity to observe readily or to remove non-conforming portions, as can be carried out on the cut length product. However, this does not relieve the manufacturer of responsibility to provide a product that meets the requirement for surface condition that is normally obtained on zinccoated twin-roll cast steel sheet products.
12 Inspection and acceptance
12,1 Although not usually required for products covered by this document, when the purchaser specifies that inspection and tests for acceptance shall be observed prior to shipment from the manufacturer’s works, the manufacturer shall afford the purchaser’s Inspector all reasonable facilities to determine that the steel is being Furnished in accordance with this document.
12.2 Steel that is reported to be non-conforming after arrival at the user’s works shall be set aside. properly and correctly identified and adequately protected. The manufacturer shall be notified so that the reported non-conforming material Is properly Investigated.