BS EN ISO 9443:2018 pdf download

08-31-2020 comment

BS EN ISO 9443:2018,Surface quality classes for hot-rolled bars and wire rod.BS EN ISO 9443:2018 pdf free download.
BS EN ISO 9443:2018 specifies technical delivery requirements for the surface quality of round bars, squares, hexagons and wire rod in the hot rolled condition with nominal dimensions dN from 5 mm to 200 mm. This document is applicable to bright products and tool steels, if agreed at the time of enquiry and order between manufacturer and purchaser.
By agreement between manufacturer and purchaser, this document can also be applied to other special profiles.
This document is particularly applicable to steels for engineering and structural applications.
BS EN ISO 9443:2018 does not include any requirements for the permissible depth of surface decarburization.
4.1 Ordering
If the appropriate International Standard specifying the quality requirements for the material does not contain exact specifications for the required surface quality class and the admissible portion of defective material, the following details shall be given in the following order.
a)The surface quality class (see Table 1) unless class A or default class.
b) The maximum admissible portion z of defective material in the total delivery lot (for the default value see Table 1, other values can be agreed at the time of enquiry and order).
c)The type of verification, which is left to the producer if not specified at the time of enquiry and order.
NOTE: A guideline for applying surface quality classes is given in Annex A.
Production tests on trial batches
When receiving inspection reveals questionable quality, the processing of a trial batch may be ag upon in order to reveal whether the material is acceptable for the intended application. In this case the size of the trial batch has to be agreed upon.

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