EN 10216-5 1.4307 (X2CrNi18-9) Seamless Stainless Steel Tube | 304L Pressure Pipe
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EN 1.4307 (X2CrNi18-9) is a low-carbon austenitic stainless steel equivalent to ASTM A312 TP304L / UNS S30403, designed for pressure service and welded equipment requiring enhanced corrosion resistance.
What Is EN 10216-5?
EN 10216-5 is the European standard for seamless stainless steel tubes for pressure purposes.
It specifies:
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Chemical composition
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Mechanical properties
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Heat treatment condition
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Dimensional tolerances
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Inspection and testing
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Delivery requirements
These tubes are widely used in PED 2014/68/EU regulated pressure systems across Europe and international EPC projects.
Material Overview – X2CrNi18-9 (1.4307)
1.4307 is a chromium-nickel austenitic stainless steel with reduced carbon content (≤0.03%), offering improved resistance to intergranular corrosion compared to 1.4301 (304).
Key Features
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Carbon ≤ 0.03%
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Excellent weldability
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Fully austenitic microstructure
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Good corrosion resistance
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High ductility and formability
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Reliable performance in pressure applications
Equivalent Grades
| Standard | Grade |
|---|---|
| EN | 1.4307 / X2CrNi18-9 |
| ASTM | A312 TP304L |
| UNS | S30403 |
| AISI | 304L |
| DIN | X2CrNi18-9 |
Equivalent grades are for reference only; compliance should be confirmed per project specification.
1.4307 vs 304L – Key Differences
Although EN 1.4307 and ASTM 304L are equivalent materials, they follow different standards.
Chemical Composition Comparison
| Element | EN 1.4307 | ASTM 304L |
|---|---|---|
| Carbon | ≤ 0.03% | ≤ 0.03% |
| Chromium | 17.5 – 19.5% | 18.0 – 20.0% |
| Nickel | 8.0 – 10.0% | 8.0 – 12.0% |
Mechanical Properties Comparison
| Property | EN 1.4307 | ASTM 304L |
|---|---|---|
| Yield Strength | ≥ 200 MPa | ≥ 170 MPa |
| Tensile Strength | 500 – 700 MPa | ≥ 485 MPa |
| Elongation | ≥ 45% | ≥ 35% |
Practical Application Difference
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1.4307 is typically specified for European PED projects
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304L is common in ASME / ASTM and oil & gas markets
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Performance and corrosion resistance are essentially equivalent
EN 1.4307 Chemical Composition (%)
| Element | Content |
|---|---|
| C | ≤ 0.03 |
| Si | ≤ 1.00 |
| Mn | ≤ 2.00 |
| P | ≤ 0.040 |
| S | ≤ 0.015 |
| Cr | 17.5 – 19.5 |
| Ni | 8.0 – 10.0 |
| N | ≤ 0.11 |
Mechanical Properties (Room Temperature)
| Property | Value |
|---|---|
| Yield Strength (0.2%) | ≥ 200 MPa |
| Tensile Strength | 500 – 700 MPa |
| Elongation | ≥ 45% |
Manufacturing & Delivery Condition
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Manufacturing: Seamless (Hot Finished / Cold Drawn)
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Heat Treatment: Solution Annealed
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Surface Finish: Pickled or Bright Annealed
Solution annealing ensures:
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Fully austenitic structure
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Stable corrosion resistance
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Consistent mechanical performance
Size Range
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Outside Diameter: 6 mm – 813 mm
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Wall Thickness: 1.0 mm – 40 mm
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Length: Random / Fixed / Cut to size
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Custom sizes available
Corrosion Resistance
EN 1.4307 seamless stainless steel tubes provide:
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Good atmospheric corrosion resistance
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Resistance to organic acids
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Suitable performance in water and mild chemical environments
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Reliable service in hygienic systems
For chloride-rich environments, EN 1.4404 (316L) is recommended.
Inspection & Certification
All tubes are tested according to EN 10216-5:
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Chemical analysis
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Mechanical testing
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Hydrostatic or NDT testing
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Eddy current or ultrasonic inspection
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Dimensional inspection
Available certifications:
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EN 10204 3.1
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PED 2014/68/EU
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Third-party inspection (TÜV, BV, SGS)
Applications
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Pressure piping systems
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Heat exchangers and condensers
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Chemical and petrochemical equipment
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Food and pharmaceutical processing
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Water treatment plants
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Industrial process pipelines
FAQ
What is EN 1.4307 equivalent to?
It is equivalent to ASTM A312 TP304L and UNS S30403.
Is 1.4307 suitable for pressure applications?
Yes, it is specified under EN 10216-5 for seamless tubes used in pressure service.
What is the difference between 1.4307 and 1.4301?
1.4307 has lower carbon content, offering better weld corrosion resistance.
Related Products
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EN 10216-5 1.4301 Seamless Stainless Steel Tube
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EN 10216-5 1.4404 Stainless Steel Tube
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ASTM A312 TP304L Stainless Steel Pipe
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ASTM A312 TP316L Stainless Steel Pipe
