TP304 stainless steel pipe (18-8 austenitic stainless steel), tailored for B2B trade, specification confirmation, and project sourcing, including Chinese GB equivalent, global standards, properties, types, applications and quality documentation requirements.
1. Material & Chemical Composition
Metallurgical structure: fully austenitic, non-magnetic (after solution annealing); good ductility, weldability, and formability
Chemical Composition (GB/T 06Cr19Ni10)
| Element |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Fe |
| % |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.045 |
≤0.030 |
18.0-20.0 |
8.0-11.0 |
Balance |
2. Key Mechanical Properties
| Property |
Value |
| Tensile Strength |
≥ 520 MPa |
| Yield Strength |
≥ 205 MPa |
| Elongation |
≥ 40% |
| Hardness |
≤ 187 HBW, ≤ 90 HRB |
| Density |
7.93 g/cm³ |
| Max Working Temp. |
870°C (continuous) |
3. Equivalent Grades
USA: AISI 304 / UNS S30400
Japan: SUS304
Germany/Europe: 1.4301 / X5CrNi18-10
China: 06Cr19Ni10 (old: 0Cr18Ni9)
4. Size & Specification
Outer Diameter (OD): 6 mm - 630 mm (up to 3000mm custom)
Wall Thickness (WT): 0.15 mm - 50 mm
Common dimensional systems: OD × Wall Thickness (mm); NPS/DN+Schedule (SCH 10S, SCH 40S, SCH 80S, etc.). Standard lengths are 6m, 12m; custom lengths available. Surface finishes: pickled (industrial), 2B (mill finish), BA (bright annealed), polished (No.4, mirror).
Standard Length: 6m (customizable 1-12m)
Types: Seamless , Welded
Surface: 2B , BA, Polished
5. Production Types & Common Standards
ASTM A312 (Seamless/Welded)
ASTM A213 (Boiler/Heat Exchanger)
GB/T 14976 (Fluid Pipe)
EN 10216, JIS G3459
| Type |
Production Process |
Common Standards |
Typical Uses |
| Seamless Pipe |
Hot piercing+cold drawing/rolling |
ASTM A312, GB/T 14975, EN 10216-5 |
High pressure, high temp, chemical, boiler |
| Welded Pipe (ERW/SAW) |
Strip forming+fusion welding |
ASTM A312, GB/T 12771, EN 10217-7 |
General fluid, architecture, low/medium pressure |
| Decorative Pipe |
Thin-wall welded, polished surface |
GB/T 18705 |
Railings, handrails, curtain walls |
6. Core Advantages & Limitations vs. Alternatives
Advantages: Excellent resistance to atmospheric corrosion, weak acids/alkalis, and oxidation; food-grade compliant (3-A, FDA); easy to weld (TIG/MIG) and fabricate; high impact toughness at low temps
Limitations: Poor resistance to chloride pitting/crevice corrosion (not recommended for seawater; use 316/316L instead); susceptible to intergranular corrosion if improperly heat-treated after welding (use 304L for critical welded systems)
vs. 200-series: Better corrosion & heat resistance.
vs. 316: Lower cost; 316 is better for chloride (seawater) environments.
vs. 304L: 304L (extra-low carbon) is better for heavy welding to avoid intergranular corrosion.
7. Key Application Sectors
Food & Beverage: dairy, brewery, juice processing, clean water lines
Chemical & Petrochemical: general corrosive fluid transfer, heat exchangers, reactor coils
Building & Infrastructure: potable water piping, HVAC, architectural railings, facade structures
Pharmaceutical & Medical: sterile fluid systems, cleanroom piping
Energy & Power: boiler feedwater, condenser tubes, desalination pre-treatment
Automotive & General Machinery: hydraulic lines, instrumentation tubes
8 Quality & Certification for Global Trade
Mandatory tests: dimensional check, visual inspection, pressure/leak test, chemical analysis (spectrometry), mechanical testing, grain size, intergranular corrosion test (if specified)
Documentation: MTC (Mill Test Certificate) per EN 10204 3.1/3.2; third-party lab report (e.g., SGS, BV); market-specific certifications (INMETRO for Brazil, GOST-R for Russia, etc.)
Inspection methods: positive material identification (PMI) via XRF/optical emission spectrometry; ultrasonic testing (UT) for wall thickness/inclusions; eddy current (ET) for surface defects
9. Sourcing & Specification Tips for Exports
Clearly state the standard+grade (e.g., ASTM A312 TP304, GB/T 14975 06Cr19Ni10)
Define OD, wall thickness, schedule, length, surface finish, and test requirements upfront
For chloride-rich environments, consider upgrading to 316L; for welded systems requiring resistance to intergranular corrosion, specify 304L (C ≤ 0.03%)
Verify the supplier's capability to provide EN 10204 3.2 certificates and PMI reports for each batch, especially for high-value or critical projects
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based", since the establishment of the company and always to do our best to satisfy potential needs of our customers. Our company is sincerely to willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with irresistible force.
Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details.
Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q5: Can you provide sample?
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.
Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.
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