🟧 Product Overview
304 Stainless Steel Pipe is the most widely used austenitic stainless steel tube, containing 18% chromium and 8% nickel. It offers excellent corrosion resistance, high ductility, and outstanding weldability, making it suitable for a wide range of industrial, architectural, and sanitary applications.
Available in both seamless and welded forms, 304 stainless steel pipe supports multiple surface finishes and precision tolerances.
Key Advantages:
Excellent corrosion and oxidation resistance
Suitable for food-grade and sanitary applications
Good weldability without cracking
Stable mechanical properties across temperatures
Cost-effective compared to higher alloy grades
🟧 Standards
ASTM A312 / A312M
ASTM A213
EN 10216-5
JIS G3463
GB/T 14976
🟧 Grade
🟧 Product Specifications & Available Sizes
Outer Diameter (OD)
Seamless: 6–530 mm
Welded: 12–630 mm
Wall Thickness (WT) Length Type
Seamless (Cold Drawn / Hot Rolled)
Welded (ERW / TIG / Laser Welded)
Surface Finish
2B
BA
180 / 240 / 320 / 400 / 600 Grit Polish
8K Mirror
Pickled
🟧 Chemical Composition (ASTM A312 TP304)
Element Content (%) C ≤ 0.08 Si ≤ 1.00 Mn ≤ 2.00 P ≤ 0.045 S ≤ 0.030 Cr 18.0–20.0 Ni 8.0–11.0 N ≤ 0.10
🟧 Mechanical Properties
Property Requirement Tensile Strength ≥ 515 MPa Yield Strength ≥ 205 MPa Elongation ≥ 40% Hardness ≤ 201 HB
🟧 Physical Properties
Property Value Density 7.93 g/cm³ Melting Point 1400–1450°C Thermal Conductivity 16.2 W/m·K Electrical Resistivity 0.72 μΩ·m
🟧 Manufacturing Processes
Hot Rolling
Cold Drawing
TIG Welding
Laser Welding
Annealing
Pickling
Polishing
Eddy Current Testing
Hydrostatic Testing
🟧 Primary Industry Usage
Food processing equipment
Chemical pipelines
Heat exchangers
Water treatment systems
Architectural decoration
Automotive components
Pharmaceutical equipment
🟧 Why Use 304 Stainless Steel Pipe
Excellent general corrosion resistance
Suitable for welding, bending, forming
Compatible with food, water, and chemicals
Balanced performance and cost
Most widely used stainless steel grade globally
🟧 Why Choose WelSteels
Full MTC 3.1 certification
Seamless & welded production capability
Global shipping with loading photos
Competitive pricing for bulk orders
Technical support for projects
Custom sizes, tolerances, finishes available
International Standard of Stainless Steel
NO China Japan America Korea Germany India Australia GB JIS ASTM UNS KS DIN BIS AS CNS Austenitic Stainless Steel 1 12Cr17Mn6Ni5N SUS201 201 S20100 STS201 1.4372 10Cr17Mn6Ni4N20 201-2 201 2 12Cr18Mn9Ni5N SUS202 202 S20200 STS202 1.4373 – – 202 3 12Cr17Ni7 SUS301 301 S20200 STS301 1.4319 10Cr17Ni7 301 301 4 06Cr19Ni10 SUS304 304 S30400 STS304 1.4301 07Cr18Ni9 304 304 5 022Cr19Ni10 SUS304L 304L S30403 STS304L 1.4306 02Cr18Ni11 304L 304L 6 06Cr19Ni10N SUS304N1 304N S30451 STS304N1 1.4315 – 304N1 304N1 7 06Cr19Ni9NbN SUS304N2 XM21 S30452 STS304N2 – – 304N2 304N2 8 022Cr19Ni10N SUS304LN 304LN S30453 STS304LN – – 304LN 304LN 9 10Cr18Ni12 SUS305 305 S30500 STS305 1.4303 – 305 305 10 06Cr23Ni13 SUS309S 309S S30908 STS309S 1.4833 – 309S 309S 11 06Cr25Ni20 SUS310S 310S S31008 STS310S 1.4845 – 310S 310S 12 06Cr17Ni12Mo2 SUS316 316 S31600 STS316 1.4401 04Cr17Ni12Mo2 316 316 13 06Cr17Ni12Mo2Ti SUS316Ti 316Ti S31635 – 1.4571 04Cr17Ni12MoTi20 316Ti 316Ti 14 022Cr17Ni12Mo2 SUS316L 316L S31603 STS316L 1.4404 ~02Cr17Ni12Mo2 316L 316L 15 06Cr17Ni12Mo2N SUS316N 316N S31651 STS316N – – 316N 316N 16 022Cr17Ni13Mo2N SUS316LN 316LN S31653 STS316LN 1.4429 – 316LN 316LN 17 06Cr18Ni12Mo2Cu2 SUS316J1 – – STS316J1 – – 316J1 316J1 18 022Cr18Ni14Mo2Cu2 SUS316J1L – – STS316J1L – – – 316J1L 19 06Cr19Ni13Mo3 SUS317 317 S31700 STS317 – – 317 317 20 022Cr19Ni13Mo3 SUS317L 317L S31703 STS317L 1.4438 – 317L 317L 21 06Cr18Ni11Ti S SUS321 321 S32100 STS321 1.4541 04Cr18Ni10Ti20 321 321 22 06Cr18Ni11Nb SUS347 347 S34700 STS347 1.4550 04Cr18Ni10Nb40 347 347 Duplex Stainless Steel 1 – SUS329J1 329 S32900 STS329J1 1.4477 – 329J1 – 2 022Cr23Ni5Mo3N – S32205 F60 – 1.4462 – 2205 2205 3 022Cr25Ni7Mo4N – S32750 F53 – 1.4410 – 2507 2507 Ferrite stainless steel 1 06Crl3Al SUS405 405 S40500 STS405 1.4002 04Cr13 405 405 2 022Cr11Ti SUH409 409 S40900 STS409 1.4512 – 409L 409L 3 022Cr12 SUS410L – – STS410L – – 410L 410L 4 10Cr17 SUS430 430 S43000 STS430 1.4016 05Cr17 430 430 5 10Cr17Mo SUS434 434 S43400 STS434 1.4113 – 434 434 6 022Cr18NbTi – – S43940 – 1.4509 – 439 439 7 019Cr19Mo2NbTi SUS444 444 S44400 STS444 1.4521 – 444 444 Martensitic Stainless Steel 1 12Cr12 SUS403 403 S40300 STS403 – – 403 403 2 12Cr13 SUS410 410 S41000 STS410 1.4006 12Cr13 410 410 3 20Cr13 SUS420J1 410 S42000 STS420J1 1.4021 20Cr13 420 420J1 4 30Cr13 SUS420J2 – – STS420J2 1.4028 30 Cr13 420J2 420J2 5 68Cr17 SUS440A 440A S44002 STS440A – – 440A 440A
