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Application Areas:
Due to the excellent performance of ASTM A269 Stainless Steel 304/304L Multi-Core Tubes, they are widely used in a number of applications, including but not limited to:
Chemical and petroleum industries: piping systems for the transportation of corrosive fluids.
Marine engineering: for piping and heat exchangers in seawater environments.
Food and beverage processing: hygienic piping systems for conveying a wide range of food-grade fluids.
Pharmaceutical industry: for use in drug manufacturing processes where strict hygienic conditions are required.
Heat exchangers and condensers: in these installations, multi-core tubes are effective in increasing heat exchange efficiency while reducing the size of the equipment.
Aviation and aerospace industry: Due to their excellent mechanical properties and corrosion resistance, these tubes are also used in critical structures and systems in aircraft and spacecraft.
Chemical Composition:
| Material | Chemical Composition % Max | ||||||||||
| C | Mn | P | S | Si | Cr | Ni | Mo | N B | Nb | Ti | |
| TP304 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18.0-20.0 | 8.0-11.0 | - | - | - | - |
| TP304L | 0.035 | 2 | 0.045 | 0.03 | 1 | 18.0-20.0 | 8.0-12.0 | - | - | - | - |
| TP316 | 0.08 | 2 | 0.045 | 0.03 | 1 | 16.0-18.0 | 10.0-14.0 | 2.00-3.00 | - | - | - |
| TP316L | 0.035 | 2 | 0.045 | 0.03 | 1 | 16.0-18.0 | 10.0-15.0 | 2.00-3.00 | - | - | - |
| TP321 | 0.08 | 2 | 0.045 | 0.03 | 1 | 17.0-19.0 | 9.0-12.0 | - | - | - | 5C -0.70 |
| TP347 | 0.08 | 2 | 0.045 | 0.03 | 1 | 17.0-19.0 | 9.0-12.0 | - | - | 10C -1.10 | - |
Physical Property:
| Steel grade | Physical Property | |||
| Y.S | T.S | EL. | HRB | |
| 304 | ≥205 | ≥515-1035 | ≥40 | ≤92 |
| 304L | ≥205 | ≥520 | ≥40 | ≤90 |
| 316 | ≥620 | ≥310 | ≥30 | ≤95 |
| 316L | ≥480 | ≥177 | ≥40 | ≤90 |
| 321 | ≥205 | ≥515 | ≥40 | ≤95 |
| 347 | ≥205 | ≥515 | ≥40 | ≤92 |
With the continuous emergence of new materials and technologies, the processing and application technologies of ASTM A269 Stainless Steel 304/304L Multi-core Tubes will also be further developed and improved. For example, through the surface treatment technology to improve the corrosion and abrasion resistance of the pipe surface, or the development of new alloy element ratios to improve the overall performance of the material.