Jiaxing MT stainless steel co.,ltd.
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ASTM A213 / ASTM A269 Small Diameter TP304L Stainless Steel Heat Exchanger Tube For Fluid and Gas
Our heat exchanger tube with pickling and annealing surface is very popular in boilers and heat exchangers industry , water heater industry , air-conditioning industry etc . This kind of seamless tubes are have a very important position in our all products .
Chemical Composition :
| Material | ASTM A269 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 D | 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 | ^ | ||
| ASTM A213 / A213 M | ||
| Elements | 304L(wt%) | 316L (wt%) |
| (C) Carbon, max | 0.035 | 0.035 |
| (Mn) Manganese, max | 2 | 2 |
| (P) Phosphorus, max | 0.045 | 0.045 |
| (S) Sulfur, max | 0.03 | 0.03 |
| (Si) Silicon, max | 1 | 1 |
| (Ni) Nickel | 8.0 - 12.0 | 10.0 - 14.0 |
| (Cr) Chromium | 18.0 - 20.0 | 16.0 - 18.0 |
| (Mo) Molybdenum | N/A | 2.0 - 3.0 |
| (Fe) Iron | Bal. | Bal. |
| (Cu) Copper | N/A | N/A |
| (N) Nitrogen | N/A | N/A |
Process :
1 . We use Cold Drawn techonology to produce U bend tube
2 . U bend tubes produce will accordance to customer's drawings
3 . To avoid oxidation , inert gas (Argon) is passed through tubes ID at the required flow rate
4 . The radius is checked for its OD and wall thinning with the recommended specification
5 . We'll choose three different position or as customer's require to make sure tubes quality . We'll do physical properties and micro-structure test
6 . Visual inspection for waviness and cracks is done with Dye Penetrant Test
7 . Each tube is then hydro tested at the recommended pressure to check for leakage
