Materials for coiled tube heat exchangers
Thread Content
I saw that the material of the coiled tube heat exchanger is marked as “SS”. What is this material? What country’s standard is it? What material does it correspond to in terms of national standards?
stainless steel stainless steel
This is a notation method that originated in Japan; the first ‘s’ stands for Steel, the second one stands for Structure, and there are usually corresponding numbers following it to indicate the tensile force.
The coil heat exchangers in low-temperature methanol washing systems are generally made of 0Cr18Ni10Ti material, that is, they are fabricated from low-temperature alloy steel!
The original poster didn’t specify what type of material it is
Replying to the two people above: there are no numbers indicated after SS; what materials are used for your coiled tube heat exchangers?
Approximate comparison of commonly used stainless steel grades in China and Japan 1. Comparison table: Japan (JIS) China (GB) SUS304 0Cr18Ni9(0Cr19Ni9) SUS 304L 00Cr19Ni10(00Cr18Ni10) SUS 309S 0Cr23Ni13 SUS 310S 0Cr25Ni20(1Cr25Ni20Si2) SUS 316 0Cr17Ni12Mo2(0Cr18Ni12Mo2Ti) SUS 316L 00Cr17Ni14Mo2 SUS 321 1Cr18Ni9Ti(0Cr18Ni9Ti) SUS 430 1Cr17 SUS 403 1Cr12 SUS 410 1Cr13 SUS 420J1 2Cr13 SUS 420J2 3Cr13 SUS 431 1Cr17Ni2 2. The number “NO.1” appended to the grade indicates that heat treatment, pickling, or similar treatments are carried out after hot rolling； NO.2 indicates heat treatment, pickling, or corresponding treatments after cold rolling ； NO.2B indicates that after cold rolling, heat treatment, pickling, or similar treatments are carried out, and finally cold rolling is used to achieve the desired level of smoothness. For example, 304NO.1 stainless steel plate refers to a hot-rolled stainless steel plate with grade 304. For example, 321-2B denotes a cold-rolled stainless steel sheet with grade 321; the surface is required to undergo heat treatment after cold rolling, as well as pickling or similar treatments, before finally being cold-rolled to achieve the desired level of smoothness.