STAINLESS STEEL SEAMLESS TUBE
LEADING SUPPLIER OF PRECISION STAINLESS STEEL SEAMLESS TUBE
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Stainless Steel Seamless Tube Specification:
ASTM A268, ASTM A269, ASTM A213, ASTM A312, ASTM B677
Request a QuoteGrade: 304, 304L, 316L, 309/309S, 310/310S, 904L
Duplex 2205, Duplex2507
Outer Diameter: 2.0mm to 114mm
Wall thickness: 0.3mm to 8.0mm
Length: Standard 6000mm, but we can adjust based on customer’s requirement.
Condition: AP, BA, EP
Surface Roughness: RA0.8, RA0.4, RA0.2, RA0.1 etc.
Surface Roughness: RA0.8, RA0.4, RA0.2, RA0.1 etc.
Seamless Tube Manufacturing Processes and Surface Treatments
Seamless Tube Production: Cold Drawing & Cold Rolling
Seamless pipes are manufactured through two primary methods: cold drawing and cold rolling. Both processes begin with a mother pipe, but each has unique features and applications.
Cold Drawing:
This process involves pulling the mother pipe through a series of dies to gradually reduce its diameter and wall thickness.
Key Features:
●High precision in size and thickness.
●Excellent surface finish.
●Ideal for producing small-diameter and thin-walled pipes.
●Commonly used for applications like instrumentation tubes, medical devices, and heat exchanger tubes.
Cold Rolling:
Cold rolling uses a pair of rotating rolls to compress and shape the mother pipe.
Key Features:
●Suitable for producing larger-diameter or thicker-walled seamless pipes.
●Achieves high strength and uniform mechanical properties.
●Offers a more efficient production process compared to cold drawing.
●Widely used in industries requiring structural components and heavy-duty applications.
●Both methods ensure the seamless pipes are free of welded joints, making them suitable for high-pressure and critical environments.
Surface Treatment Methods:
1, AP (Annealing and Pickling):
After the manufacturing process, pipes undergo annealing to relieve internal stresses and pickling to remove surface oxide scales. This ensures a clean, corrosion-resistant finish suitable for general industrial applications.
2, BA (Bright Annealed Finish):
This advanced treatment involves heat-treating the pipes in a controlled hydrogen atmosphere to prevent oxidation. The result is a bright, smooth, scale-free surface that is ideal for industries with stringent surface quality requirements.
3, EP (Electro Polishing):
This electrolytic process further enhances the pipe's surface quality by improving uniformity, corrosion resistance, and smoothness. Electropolished tubes are critical in high-purity applications, such as semiconductor manufacturing and ultra-clean environments.
These processes enable seamless pipes to meet diverse industry requirements, from high-pressure systems to ultra-precision applications.
APPLICATIONS OF STAINLESS STEEL SEAMLESS TUBE
1. Instrumentation Tubes
Request a Quote2. Thermocouple Protection Tubes
3. Medical Device Tubes
4. Automotive Tubing
5. Semiconductor Tubes
6. Fluid Transportation Tubes
7. Food and Beverage Industry Tubes
8. Precision Mechanical Components
9. Capillary Tubing
FEATURES OF STAINLESS
304: 304 stainless steel is resistant to corrosion and high temperature, and has good processing performance, so it is widely used in industry, furniture decoration industry and food and medical industry.
316L: Compared with conventional chromium-nickel austenitic stainless steel such as 304 stainless steel, 316L has better resistance to general corrosion, pitting corrosion and crevice corrosion. 316L has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance.
309/309S: 309/309S stainless steel can withstand repeated heating below 980 °C, it has high high-temperature strength, oxidation resistance, and carburization resistance.
310/310S: 310/310S stainless steel is an austenitic chromium-nickel stainless steel, which has good oxidation resistance, corrosion resistance, high temperature resistance, and because of the higher percentage of chromium and nickel, it has much better creep strength and can continue to work at high temperatures,
310/310S: 310/310S stainless steel is an austenitic chromium-nickel stainless steel, which has good oxidation resistance, corrosion resistance, high temperature resistance, and because of the higher percentage of chromium and nickel, it has much better creep strength and can continue to work at high temperatures,
it also has good high temperature resistance. Due to the high content of Ni and Cr, it has good oxidation resistance, corrosion resistance, acid and alkali resistance, and high temperature resistance. The high temperature resistant steel pipe is specially used in the manufacture of electric furnace tubes and other occasions.
Duplex 2205: The yield strength of Duplex 2205 stainless steel is more than double that of ordinary austenitic stainless steel. This feature allows designers to reduce weight when designing products, making this alloy more price-competitive than 316, 317L. This alloy is especially suitable for use in the -50°F/+600°F temperature range.
Duplex 2507: Duplex 2507 is a ferritic-austenitic (duplex) stainless steel, which combines the most beneficial properties of many ferritic steels and austenitic steels. Due to the high content of chromium and molybdenum in this steel, it has extremely Good resistance to pitting corrosion, crevice corrosion and uniform corrosion. The dual-phase microstructure ensures that the steel has a high resistance to stress corrosion cracking, and its mechanical strength is also high.
Duplex 2205: The yield strength of Duplex 2205 stainless steel is more than double that of ordinary austenitic stainless steel. This feature allows designers to reduce weight when designing products, making this alloy more price-competitive than 316, 317L. This alloy is especially suitable for use in the -50°F/+600°F temperature range.
Duplex 2507: Duplex 2507 is a ferritic-austenitic (duplex) stainless steel, which combines the most beneficial properties of many ferritic steels and austenitic steels. Due to the high content of chromium and molybdenum in this steel, it has extremely Good resistance to pitting corrosion, crevice corrosion and uniform corrosion. The dual-phase microstructure ensures that the steel has a high resistance to stress corrosion cracking, and its mechanical strength is also high.
Stainless Steel Seamless Tube Standards:
ASTM A268, ASTM A269, ASTM A213, ASTM A312
Stainless Density:
0.286 lb/in3 (7.93g/cm3), 0.29 lb/in3 (7.98g/cm3)