Malaysia buyers often ask the same question first: should the access structure be hot-dip galvanized, stainless steel 304, or stainless steel 316? There is no one universal answer, because inland industrial sites, rooftop service routes, wastewater areas, and coastal projects behave differently.
Hot-dip galvanized steel is usually the best default for general outdoor use because it balances durability and cost. SS304 becomes more attractive when the environment is cleaner or the buyer prefers stainless appearance. SS316 is the material to evaluate when chloride exposure, coastal air, or aggressive chemicals are part of the brief.
The most useful RFQ is the one that describes the environment clearly. Once humidity, wash-down, salt exposure, and maintenance cycle are known, the finish decision becomes much easier and much more defensible.