304L stainless steel pipe belongs to the international stainless steel marking method. 304L stainless steel tube–S30403 (American AISI, ASTM) 304L corresponding Chinese brand is 00Cr19Ni10, characteristics and uses: steel with lower carbon content than 0Cr19Ni9, excellent resistance to intergranular corrosion, no heat treatment parts after welding.304L stainless steel pipes supplier
International stainless steel marking method:
The American Iron and Steel Institute uses three digits to mark various standard grades of malleable. among them:
1 Austenitic stainless steel is marked with numbers in the 200 and 300 series.
2 Ferritic and martensitic stainless steels are represented by numbers in the 400 series. For example, some of the more common austenitic stainless steels,marked by 201, 304L, 316 and 310,
3 ferritic stainless steel is marked with 430 and 446, martensitic stainless steel is marked with 410, 420 and 440C, two-phase (austenitic-ferritic),
4 Stainless steel, precipitation hardened stainless steel and high alloys containing less than 50% iron are usually given a patent or trade name.
304L stainless steel tube chemical composition:
Element content of 304L stainless steel tube C≤0.03 Ni8.00～12.00 Cr18.00～20.00, Mn<=2.0 Si<=1.0 S<=0.030 P<=0.035.
304L stainless steel tube 18Cr-8Ni-low carbon is used as low C 304 steel. Under normal conditions, its corrosion resistance is similar to that of 304 steel, but its resistance to intergranular corrosion is excellent after welding or after stress relief; In the case of heat treatment, good corrosion resistance can also be maintained, and the use temperature is -196 ° C to 800 ° C. It is used in field open-air machines for chemical, coal, and petroleum industries with high resistance to intergranular corrosion, heat-resistant parts for building materials, and parts with difficult heat treatment.
304L stainless steel tube type:
1.304L stainless steel tube heat exchanger tube
Condenser, thermal solution treatment, pickling performance characteristics: smooth inner wall of the pipe, low water resistance, erosion and solid solution treatment, the mechanical properties and corrosion resistance of the weld bead are basically the same. Excellent deep processing performance.
2.304L stainless steel tube thin wall stainless steel tube
Uses: Mainly used for direct drinking water projects, other highly demanding fluid transport
Main features: long service life; low failure rate and water leakage rate; good water quality, no harmful objects will be precipitated into the water; the inner wall of the pipe is not crusted, smooth, low water resistance; high cost performance, long service life of 100 years, no Maintenance, low cost; can withstand high water flow erosion up to 30m / s; clear tube laying, beautiful appearance.
3.304L stainless steel tube food hygiene tube
Uses: Milk and food industry, pharmaceutical industry, special inner surface requirements of the industry. ?
Process characteristics: inner bead leveling treatment, solution treatment, inner surface electropolishing
Performance characteristics: the internal surface roughness Ra is more than 0.2, the wall hanging residue is small, easy to clean, prevent bacterial growth, electrolytic polishing has a passivation effect, and the inner wall has good defense performance.
Testing methods: lateral, longitudinal flattening, reverse flattening, hydrostatic testing or eddy current testing, mechanical properties testing, internal surface roughness testing.
4.304L stainless steel tube fluid tube stainless steel tube
Carefully manufactured stainless steel inner flat welded pipe, widely used in dairy products, beer, beverage, pharmaceutical, biological, cosmetic, fine chemical compared to ordinary sanitary steel pipe, its surface finish and smooth inner wall, steel plate flexibility is better, coverage Wide, uniform wall thickness, higher precision, no pitting, good quality.square steel tubing for sale
304L stainless steel tube characteristics
As a widely used steel, 18Cr-8Ni has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; good hot workability such as stamping and bending, no heat treatment hardening (non-magnetic, use temperature -196 ° C ~800 ° C).
304L stainless steel tube use
Household items (1, 2 types of tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, molded products), medical equipment, building materials, chemicals, food industry, agriculture, ship parts;
Stainless steel, alloy tool steel (representing C content in parts per thousand), such as: 1Cr18Ni9 one thousandth (ie 0.1% C), stainless C≤0.08% such as 0Cr18Ni9, ultra low carbon C≤0.03% such as 0Cr17Ni13Mo.