What is the difference between stainless steel tube 904l and 304
 
That difference can be too big, one at the front of the austenitic stainless steel brand and the other at the end of the austenitic stainless steel, the price and performance of several times.
 
The composition of these two stainless steels is as follows:
 
904 l: C0.02, Mn2.00 P0.04, S0.03, Si1.00, Cr23.0-28.0, Ni19.0-23.0, Mo4.0-5.0. Cu1.0-2.0.
 
304: C0.08, Mn2.00, P0.045, S0.03, Si1.00, cr18.0-20.0, ni8.0-11.0,
 
20cr-24ni-4.3 mo-1.5cu, brand and standard: UNSN08904, DIN1.4539, ASTMA240 (new standard classified as stainless steel series, original standard asmesb-625 classified as nickel base alloy series), SUS890L.
 
904L is completely austenitic and is not sensitive to the precipitation of ferrite and alpha phases as compared to ordinary austenitic stainless steel with high molybdenum content.
 
904L super austenitic stainless steel is a low carbon high nickel, molybdenum austenitic stainless steel rust resistant acid, for the introduction of France H·S company's proprietary materials. It has a good activation-passivation transformation ability and excellent corrosion resistance. It has a good corrosion resistance in
 
non-oxidizing acids such as sulfuric acid, acetic acid, formic acid and phosphoric acid. It also has a good resistance to pitting corrosion in neutral chlorine-containing media. Suitable for various concentrations of sulfuric acid below 70℃, under atmospheric pressure resistance to any concentration, any temperature of
 
acetic acid and formic acid and acetic acid mixed acid corrosion resistance is also very good.
 
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