AISI/ASTM 304L stainless steel pipes/tubes Manufacturers&suppliers



What are 304L stainless steel pipes/tubes?


304L stainless steel pipe/tube belongs to the international stainless steel labeling method. 304L stainless steel pipe - S30403 (American AISI, ASTM). Characteristics and uses: lower carbon content than 0Cr19Ni9 steel, intergranular corrosion resistance is superior, for welding without heat treatment parts class.


International stainless steel labeling methods


The American Iron and Steel Institute is using three digits to label various standard grades of malleable. Among them.

① austenitic stainless steels are marked with 200 and 300 series of numbers.

② ferritic and martensitic stainless steel with the 400 series of numbers. For example, some of the more common austenitic stainless steel
is marked with 201, 304L, 316, and 310.

③ ferritic stainless steel is marked by 430 and 446, martensitic stainless steel is marked by 410, 420, as well as 440C, marked, duplex (austenitic-ferritic), and

④ stainless steels, precipitation hardening stainless steels and high alloys containing less than 50% iron are usually patented names or trademarked names.


304L stainless steel round pipes/tubes weight


304L stainless steel pipe weight per meter = outside diameter - wall thickness X wall thickness X 0.02491


Chemical composition


304L stainless steel pipe elemental content









304L stainless steel pipe/tube 18Cr-8Ni-low carbon As a low C 304 steel, in the general state, its corrosion resistance is similar to 304 steel, but after welding or stress relief, its excellent resistance to grain boundary corrosion;

In the absence of heat treatment, can also maintain good corrosion resistance, the use of temperature -196 ℃ ~ 800 ℃. It is applied to field open-air machines in chemical, coal, and petroleum industries with high requirements for resistance to grain boundary corrosion, heat-resistant parts of building materials, and parts with difficulties in heat treatment.



Tube for heat exchanger

Thin-walled stainless steel tubes

Food sanitation tube

Fluid tube stainless steel tube


Heat exchanger tube

Performance characteristics: smooth inner wall, low resistance to water transmission, can withstand high water velocity erosion, solid solution treatment, the mechanical properties of the welding channel and the substrate, anti-corrosion properties are basically the same, deep processing performance is excellent.

Thin-walled stainless steel pipe

Use: Mainly used for direct drinking water projects, other demanding fluid transportation

Main features: long service life; failure rate, low leakage rate; good water quality, will not precipitate harmful objects into the water; tube wall is not Ì, smooth, low resistance to water transmission; cost-effective, up to 100 years of service life, no maintenance, low cost; can withstand up to 30m / s above the high water velocity erosion; open pipe laying, beautiful appearance.


Food sanitation pipe

Applications: milk and food industry, pharmaceutical industry, industries with special internal surface requirements.

Process characteristics: inner weld channel leveling treatment, solution treatment, inner surface electrolytic polishing

Performance characteristics: inner surface roughness Ra above 0.2, wall hanging residue less, easy to clean, prevent the growth of bacteria, electrolytic polishing has a passivation effect, good defensive performance of the inner wall.

Testing methods: transverse, longitudinal flattening, reverse spreading, hydraulic test or eddy current flaw detection, mechanical properties testing, internal surface roughness testing.


Fluid pipe stainless steel pipe

Carefully manufactured stainless steel inner flat welded pipe, widely used in dairy products, beer, beverage, pharmaceutical, biological, cosmetic, fine chemical industry compared to ordinary sanitary steel pipe, its surface finish and smooth and flat inner wall, steel plate flexibility is more excellent, wide-coverage, uniform wall thickness, higher precision, no pockmarks, good quality features.


Mechanical properties


YS(MPA) >=175 TS(MPA) >=480 EL(%) >=40 HV <=200




18Cr-8Ni As a widely used steel, it has good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties; good hot workability such as stamping and bending, no heat treatment hardening phenomenon (non-magnetic, use temperature -196℃~800℃).




Household goods (1, 2 types of tableware, cabinets, indoor plumbing, water heaters, boilers, bathtubs), automotive parts (windshield wipers, molded products), medical appliances, building materials, chemicals, food industry, agriculture, ship parts.




AISI/ASTM 304L stainless steel pipes/tubes price $510-1000/ton