I would like to ask whether every stainless steel plate must have a factory marking, and what kind of marking should be used (can it be handwritten)?

The supervisor here says there are no markings, so approval cannot be given； There is a factory quality guarantee certificate

Coiled sheets leaving the steel mill usually have spray markings, but once they are cut into flat sheets by smaller companies, those markings are no longer present. Theoretically, each board should be marked, and the markings in the factory are sometimes handwritten.

Regardless of the unit, material acceptance must be carried out in accordance with the relevant material acceptance regulations! ! !

In addition to spraying (rather than using paint), stainless steel materials can also be marked manually with a marker pen.

It seems that all the ones we bought have markings; some have spray-painted marks while others have hand-written marks

It depends on whether it is flat steel or coiled steel; generally, coiled steel comes with markings, while for flat steel it depends on the place of origin – some sources provide markings and others do not. In particular, steel plates processed by trading companies do not have any markings

Everything is available in our factory, and it seems that handwritten entries aren’t allowed

Yes, markings are required; handwriting is not acceptable; usually stamps or printed markings are used

“All must be marked; handwriting is not acceptable; usually stamps or printing is used. 1) Stainless steel cannot be stamped with a stamp； 2) The reasons and criteria why handwriting is not acceptable (how to write when using a tablet instead of handwriting). Thank you!

There should be requirements in the steel plate standards; according to these standards, austenitic steel plates cannot be marked using pigments that contain chloride ions

It seems that each board we buy comes with a mark, usually applied by spraying or stamping. Marking and transplantation in the factory are usually done by hand.

We use spray painting here, and it is required that there be a grade, specifications, and furnace number (matching those on the warranty certificate)

If it is an original tablet, then it usually has a spray-painted label； If it is a flat sheet, then the stainless steel coils (cold-rolled and hot-rolled) produced by China’s major stainless steel manufacturers do not have any marking, but imported stainless steel coils (hot-rolled) generally have markings. Domestic stainless steel machining centers can generally apply surface marking to the plates when they are being cut to size, according to the customer’s requirements. But unless the customer requests it, marking is generally not done, as the ink, cleaning solutions, and diluents used in automatic marking machines are quite expensive.

When stainless steel sheets leave the factory, each sheet is marked. Coiled sheets have two types of markings: 1) ones located in the middle of the sheet, which appear to be spray-painted marks, with various texts composed of many dots； 2 Template spraying, to apply markings ； There is no handwriting on the factory label. In some cases, the outer packaging of the coils bears markings, while there is only one marking on the sheet metal; after cutting, only one sheet has a marking. The supervisor will not approve such a situation. The information indicated includes: material, specification model, execution standard, key number, and furnace batch number. The latter two items are usually only present on a single board. As for handwriting, it is limited to marking transplantation within the manufacturing plant. This post was last edited by 910954679 on 2009-3-16 10:56.]

The original plates all have spray coding (some also have stamped steel codes). For the rolled sheets that have been flattened, most do not have any coding; if there is any, it was added later (that is, as mentioned by the original poster, using handwritten markings).