Regarding stainless steel seamless pipes: the choice between old and new grades of welded pipes
Thread Content
Hello, friends from HaiChuan. I am a stainless steel pipe manufacturer from Wenzhou, Zhejiang. I have a question I’d like to ask those who use pipes: namely, the choice between old and new grades of stainless steel materials. New stainless steel grades have long been available, such as 06Cr19Ni10 and 06Cr18Ni11Ti; the chemical compositions of these new grades have undergone changes. Then why do many dealers and customers still use old grades like 0Cr18Ni9 and 1Cr18Ni9Ti in large quantities? In terms of cost, the older grades have relatively lower smelting costs; I guess this is the reason. As for whether there are any other reasons, I would appreciate it if you could share your insights.
We need to listen to what end-users have to say. Sometimes it seems that dealers also try to deceive end-users; one dealer fabricated information for end-users, and the owner was even arrested and forced to pay a large amount of money as compensation.
I think it uses previous design materials, and the standards in them haven’t been updated. Some design institutes these days still refer to the standards in technical specifications from the 1980s; it’s really unacceptable.
Because the manufacturers consider that after all, only a few people read the specifications; it’s possible that not everyone is aware of the new grades, while the old grades are well-known to everyone, which makes business easier! Moreover, their ingredients are not very different. . .
For this, ask them to write down the purchase standard number and the year clearly. . . Then you manufacture it according to the new standards. Coding is done according to procurement requirements. .
This situation happens often: different costs represent the sources of profit for businesses, and they are quite careful about that. The problem is that it has already been purchased; the cost aspect is less important now. They’re asking whether the standard 304 grade can be used You need to tell them the advantages and disadvantages, right? You say it can’t be the ones that others need to repurchase; oh, the general contractor will go bankrupt. There are many nuances to this.
As users, at least on our end, there isn’t a clear distinction between old and new grades; sometimes we use Japanese grade designations, other times older domestic grades, and yet again American standard designations. I think no matter how they are written, it’s important to specify clearly which grading system should be used for selecting the material.
Yes, various grade specifications are listed for users. After all, whether it’s American standards, Chinese standards, or Japanese standards, there isn’t much difference in the chemical composition; so it seems to not matter whether old or new grade specifications are used
In fact, the chemical composition of some grades differs by very little, with only minor changes. For buyers, it’s obvious that they would choose the cheaper option, as both can be used anyway. Honest businesses will state the actual material used; those that are more deceitful use older product codes as if they were new ones, and simply change the labeling to make it appear legitimate
Hehe, some national standards are used as if they were Russian standards; I said it’s missing a nickel, and he said it’s fine – I’m worried on their behalf
What the original poster means is that both new and existing brands are being produced and sold these days, right? In that case, just give the user whatever they want. If production is already being carried out using the new grade, then that proves it. The problem with the world these days is that many people resort to petty tricks. One nickel short, and it’s hard to say how many lives and families will be affected.