Aluminum A356 is made by gravity casting followed with T6 heat treatment. Die casting is cost efficient, yet lower in mechanical strength. Sealant or sealing groove is NOT available per AA59326.
2：
Brass 57 sized 1/2" to 3" are produced by forging, bigger ones by casting process. Sealant or sealing groove is NOT available per AA59326. DIN version with additional FPM/PU/PTFE seals.
3：
Stainless steel AISI316 and 304 are made by investment casting. Other grades, like Hastalloy, are possible. Sealant or sealing groove is NOT available per AA59326. DIN version with additional FPM/PU/PTFE seals.
4：
Polypropylene and nylon are process by material injection, PP with a recipe of ~30% glassfiber compound. Sealant or sealing groove is NOT available per AA59326.
