ASTM A213 TP304L Stainless Steel Seamless Pipe
Jan 26, 2026
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What is ASTM A213 TP304L?
ASTM A213 TP304L is the low-carbon variant of TP304, designed to eliminate post-weld intergranular corrosion, used in welding-intensive heat exchanger and process tubing.
Equivalent Grades (Horizontal)UNS: S30403 | JIS: SUS304L | GB: 022Cr19Ni10 | EN: X2CrNi18-10 | W.Nr.: 1.4306
Chemical Composition (wt%, Horizontal)C: ≤0.03 | Si: ≤1.00 | Mn: ≤2.00 | P: ≤0.045 | S: ≤0.030 | Cr: 18.00-20.00 | Ni: 8.00-12.00 | N: ≤0.10 | Fe: Balance
Key Properties (20°C, Annealed, Horizontal)Density: 7.93g/cm³ | Melting Point: 1400-1450°C | Tensile Strength: 485-650N/mm² | Yield Strength: ≥170N/mm² | Elongation: ≥40% | Hardness: ≤201HB
Core Characteristics
Excellent post-weld intergranular corrosion resistance (no annealing needed)
Good ductility and weldability
Slightly lower strength than TP304
Ideal for welding-intensive, medium-corrosion tubing
TP304 vs TP304L (Horizontal)Carbon: 304 (≤0.08%) | 304L (≤0.03%) | Tensile: 304 (515-690) | 304L (485-650N/mm²) | Annealing: 304 (May need) | 304L (No need)
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
| 304L | min. | - | - | - | - | - | 18.0 | - | 8.0 | - |
| max. | 0.030 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 12.0 | 0.10 | ||
| 304H | min. | 0.04 | - | - | -0.045 | - | 18.0 | - | 8.0 | - |
| max. | 0.10 | 2.0 | 0.75 | 0.030 | 20.0 | 10.5 | ||||
304 Stainless Steel Suppliers
If you have project requirements for 304 stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com
Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
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