Regarding the stainless steel material standard GB24511

This post was last edited by Xie Yi Yunduan on 2022-1-11 at 19:14. I’m a technical personnel working for a stainless steel manufacturing company. I’ll provide a brief explanation regarding the question raised above; feel free to send me a private message if you have any questions. 1. Is there an interpretation for this provision? Clause 6.8 of GB24511-2017 serves as a supplement to the standard; certain applications require steel plates with different specifications. For example, stainless steel plates used in nuclear power applications need to meet specific requirements regarding chemical composition, levels of non-metallic inclusions, non-destructive testing, and on-site verification. Such special requirements can be specified in detail within the contract ； For some other projects or equipment manufacturing, intergranular corrosion testing is required; whether to use method C or method E depends on the specific needs. All of these special requirements necessitate technical discussions between the customer and the steel manufacturer. Otherwise, although steel mills can produce them, how many of them can actually be used? 2 Can the three aspects of chemical composition, mechanical properties, and non-metallic inclusions be understood as allowing the buyer to propose requirements that are higher than the standards? Or specify a value within the standard range? As stated in response 1, the customer can request requirements that are higher than the standard or within a range lower than the standard; many of the stainless steel coil products manufactured by our company are also customized according to the customer’s specifications. Communication is needed based on specific requirements. 3 Can corrosion resistance testing and non-destructive testing be understood as tests or inspections that can be commissioned to the sheet metal manufacturer, with the results included in the material certificate? If no commission is given, the buyer can carry out the tests themselves once the materials arrive at the factory. But if the tests or inspections conducted by the buyer turn out to be unsuccessful, can that batch of sheets then be considered defective? In other words: does this regulation imply issues related to the content or cost of inspections and tests, or does it mean that if no such inspection or testing requirements are specified, the sheets might fail the tests? Non-destructive testing and corrosion resistance testing require specific qualifications; not everyone is qualified to carry them out. If the tests conducted by the customer on the materials fail, the two parties can agree to have the testing done by a third-party testing agency ； Furthermore, the stainless steel products manufactured by our company must meet the requirements of the GB24511-2017 standard in order to be deemed qualified for release from production. In state-owned enterprises, the inspection department and the production department are separate entities, which ensures the independence and objectivity of inspections and tests.