Affordable stainless steel 304 coil tubes
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201, 304, 316, 321 Seamless Stainless Steel Tubing for Heat Exchanger
Material
The seamless stainless steel tubing for heat exchangers is manufactured from austenitic stainless steels including 201, 304, 316, and 321 grades. These materials provide excellent corrosion resistance, thermal conductivity, and mechanical strength, making them ideal for heat exchanger applications in chemical, petrochemical, food, and power industries.
Specification
| Form | Seamless stainless steel tubing |
| Outer diameter | 6 mm – 101.6 mm |
| Wall thickness | 0.5 mm – 6 mm |
| Surface finish | Pickled, bright annealed (BA), or polished |
| End condition | Plain, beveled, or threaded as required |
| Testing | Dimensional, hydrostatic pressure, eddy current, and surface inspection |
Key Features
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Excellent corrosion resistance in water, steam, and chemical environments
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High thermal conductivity for efficient heat transfer
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Seamless construction → no welding defects, improved strength and leak resistance
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Durable under high pressure and temperature conditions
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Smooth internal surface → reduces scaling and fouling
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Long service life in demanding industrial applications
Chemical Composition
| Grade | C (max) | Mn (%) | P (max) | S (max) | Si (%) | Cr (%) | Ni (%) | Mo (%) | Ti/Nb (%) |
| 201 | 0.15 | 5.5–7.5 | 0.045 | 0.03 | 1.00 | 16–18 | 3.5–5.5 | – | – |
| 304 | 0.08 | 2.0 | 0.045 | 0.03 | 1.00 | 18–20 | 8–11 | – | – |
| 316 | 0.08 | 2.0 | 0.045 | 0.03 | 1.00 | 16–18 | 10–14 | 2–3 | – |
| 321 | 0.08 | 2.0 | 0.045 | 0.03 | 1.00 | 17–19 | 9–12 | – | Ti ≥5×C |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength(MPa) | Elongation (%) | Hardness (HRB, max) |
| 201 | 520 | 205 | 35 | 95 |
| 304 | 515 | 205 | 40 | 92 |
| 316 | 515 | 205 | 40 | 95 |
| 321 | 515 | 205 | 35 | 95 |
Steel Grade
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201 – Economical, general-purpose austenitic stainless steel with moderate corrosion resistance
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304 – Most commonly used stainless steel with excellent corrosion resistance and weldability
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316 – Enhanced corrosion resistance due to molybdenum, suitable for chloride environments
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321 – Titanium stabilized for high-temperature service, resistant to intergranular corrosion
Application
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Heat exchangers in chemical, petrochemical, and food industries
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Condensers and evaporators in power generation and refrigeration
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Sanitary process equipment for food, dairy, and beverage applications
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High-temperature service equipment in boilers, superheaters, and hot water lines
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Marine and offshore heat exchanger tubing in corrosive environments
Possible Alternative Grades
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EN 10216-5 – Seamless stainless steel tubes for pressure purposes
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ASTM A213 / A269 – Seamless stainless tubing for heat exchangers and boilers
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ASTM A312 – High-temperature stainless steel seamless tubes
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Duplex grades (2205, 2507) – For higher strength and superior corrosion resistance in aggressive environments
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
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