![]() While 300-series stainless steels are very popular, they aren’t universally appropriate for all process piping applications. Cosmetics and food and beverage processing are examples. The smooth, corrosion-resistant 316L stainless steel piping ensures the purity of the gas traveling through it is maintained while eliminating entrapment areas for particulates to collect.ģ04 and 316 steels are specified in applications where corrosion resistance and product purity are still important but which lack the stringent requirements found in pharmaceutical, semiconductor or aerospace manufacturing. Rather, these systems remain closed for extended periods of time to protect the purity of the production process. Electropolishing produces a much smoother surface with reduced risk of trapping remnant materials from prior batches during cleaning.Įlectropolished 316L is also preferred in semiconductor manufacturing, but for a different reason. Electropolished 316L stainless steel is preferred in this setting. In pharmaceutical settings, process piping must be thoroughly cleaned after each batch is made. Such is the case in sanitary high-purity pharmaceutical processes or semiconductor manufacturing. Some manufacturing processes feature strict cleanliness and purity requirements that dictate the kind of piping that can be used. 316L does not require post-weld annealing.ĭownload eBook 300-series stainless steel selection in process piping 316L’s lower carbon content imparts even better corrosion resistance than 316. The only difference is the carbon content. Like 304, the 316 formula does not require post-weld annealing.ģ16L stainless steel is almost identical to 316. That addition makes it much more corrosion resistant. It’s also popular in a wide range of applications because no post-weld anneal (a reheating and slow cooling process that relieves stress in metals after exposure to high heat) is required.ģ16 stainless steel is similar in chemistry to 304 but also includes molybdenum. With chromium and nickel alloys, 304 is resistant to many corrosion attacks. Ferritic steels are magnetic, have a low carbon content and are less corrosion-resistant.ģ04 stainless steel is the most common stainless formula across industrial and consumer applications. Austenitic formulas are stronger than martensitic or ferritic steels. This structure is achieved via heat treatment at very high temperatures followed by quenching-a rapid cooling process locking the structural characteristics in place. 316L stainless steel propertiesģ04, 316 and 316L stainless steel formulas are austenitic, a term classifying the steel’s crystalline structure. They feature the right mix of strength, weldability, corrosion resistance and economical cost.īut which of these is the right choice for your application? As we describe below, piping systems perform best when the materials they’re made of match the processes they support. The 304, 316 and 316L stainless steel formulas are the most commonly specified. Stainless steel-and particularly 300-series formulas-are a popular choice for a wide variety of piping applications. When manufacturers build or expand process piping systems, they have a universe of material options to choose from. ![]()
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