YUHONG HOLDING GROUP CO., LTD
YUHONG HOLDING GROUP CO., LTD
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High Frequency Welding Fin Tube , U bend Type (U bend Fin Tube),SA213 T9 and SS409, Evaporator Application
Yuhong Group's Welded Helical Solid Finned Tubes are manufactured with by helically wrapping fin strip on edge around the tube circumference and continuously welding the fin strip to the tube. The fin strip is held under tension and confined laterally as it is formed around the tube, thereby ensuring that the strip is in forceful contact with the tube surface. A continuous weld is applied at the point where the fin strip first begins to bend around the tube diameter using Yuhong Group's unique gas metal arc welding (GMAW) process. This weld process creates the strongest fin to tube attachment in the industry, excellent heat transfer characteristics, low fin-side pressure drop and little to no change in grain microstructure and physical characteristics even when 3%-9% chromium tubes are used.
| Carbon | Chromiun | Low Temperature | Stainless Steel | Duplex | Copper& Bronze | Titanium | Ni-Alloy | ||
| SA178-A | SA213-T1 | SA333-Gr.1 | SA213 | TP316L | A789-S31803 | SB111-C70600 | SB338-GR.1 | SB163 | NO2200 |
| SA178-C | SA213-T11 | SA333-Gr.3 | SA249 | TP316H | A789-S32205 | SB111-C71500 | SB338-GR.2 | SB167 | NO2201 |
| SA179 | SA213-T12 | SA333-Gr.6 | SA268 | TP316Ti | A789-S32750 | SB111-C71640 | SB338-GR.5 | SB444 | NO8020 |
| SA192 | SA213-T22 | SA333-Gr.7 | SA269 | TP316LN | A789-S32760 | SB111-C68700 | SB338-GR.7 | SB514 | NO6022 |
| SA209-T1 | SA213-T5 | SA333-Gr.8 | SA376 | TP321 | A789-S32707 | SB111-C44300 | SB338-GR.9 | SB619 | N10276 |
| SA209-T1a | SA213-T9 | SA334-Gr.1 | TP304 | TP321H | A789-S32304 | SB338-GR.12 | SB622 | NO4400 | |
| SA209-T1b | SA213-T91 | SA334-Gr.3 | TP304L | TP347 | A789-S31500 | SB626 | NO6600 | ||
| SA210-A1 | SA334-Gr.6 | TP304H | TP347H | S31254 | SB674 | NO6601 | |||
| SA210-C | SA334-Gr.7 | TP304N | TP405 | 254MA | SB677 | NO6625 | |||
| SA214 | SA334-Gr.8 | TP310H | TP409 | 17-4PH | SB704 | NO690 | |||
| SA513 MT 1010 | TP310S | TP410 | 17-7PH | SB705 | NO8800 | ||||
| SA513 MT 1015 | TP309S | TP430 | 15-7PH | N1001 | NO8810 | ||||
| SA513 MT 1020 | TP317 | TP439 | N10665 | NO8811 | |||||
| TP317L | TP444 | N10675 | NO8825 | ||||||
| TP348 | TP446 | TP904L | |||||||
| TP347HFG | |||||||||
ASTM A213/ASME SA213 T2, T11, T12, T22, T91, T92 Chemical Composition and Mechanical Properties
| Grade | Chemical Composition% | ||||||||
| C | Si | Mn | P, S Max | Cr | Mo | Ni Max | V | Al Max | |
| T2 | 0.10~0.20 | 0.10~0.30 | 0.30~0.61 | 0.025 | 0.50~0.81 | 0.44~0.65 | – | – | – |
| T11 | 0.05~0.15 | 0.50~1.00 | 0.30~0.60 | 0.025 | 1.00~1.50 | 0.44~0.65 | – | – | – |
| T12 | 0.05~0.15 | Max 0.5 | 0.30~0.61 | 0.025 | 0.80~1.25 | 0.44~0.65 | – | – | – |
| T22 | 0.05~0.15 | Max 0.5 | 0.30~0.60 | 0.025 | 1.90~2.60 | 0.87~1.13 | – | – | – |
| T91 | 0.07~0.14 | 0.20~0.50 | 0.30~0.60 | 0.02 | 8.0~9.5 | 0.85~1.05 | 0.4 | 0.18~0.25 | 0.015 |
| T92 | 0.07~0.13 | Max 0.5 | 0.30~0.60 | 0.02 | 8.5~9.5 | 0.30~0.60 | 0.4 | 0.15~0.25 | 0.015 |
| Grade | Chemical Composition% | Mechanical Properties | |||||||
| W | B | Nb | N | T. S | Y. P | Elongation | Hardness | ||
| T2 | – | – | – | – | ≥ 415MPa | ≥ 205MPa | ≥ 30% | 163HBW(85HRB) | |
| T11 | – | – | – | – | ≥ 415MPa | ≥ 205MPa | ≥ 30% | 163HBW(85HRB) | |
| T12 | – | – | – | – | ≥ 415MPa | ≥ 220MPa | ≥ 30% | 163HBW(85HRB) | |
| T22 | – | – | – | – | ≥ 415MPa | ≥ 205MPa | ≥ 30% | 163HBW(85HRB) | |
| T91 | – | – | 0.06~0.10 | 0.03~0.07 | ≥ 585MPa | ≥ 415MPa | ≥ 20% | 250HBW(25HRB) | |
| T92 | 1.50~2.00 | 0.001~0.006 | 0.04~0.09 | 0.03~0.07 | ≥ 620MPa | ≥ 440MPa | ≥ 20% | 250HBW(25HRB) | |
| Outside Diameter | OD Tolerance | WT Tolerance | Ovality Tolerance | Cut Length Tolerance |
| OD≤ 12, 7 mm | ± 0, 13 mm | ± 15 % | – | + 3, 18 mm, – 0 mm |
| 12, 7 mm < OD ≤ 38, 1 mm | ± 0, 13 mm | ± 10 % | max, 1, 65 mm | + 3, 18 mm, – 0 mm |
| 38, 1 mm < OD ≤ 88, 9 mm | ± 0, 25 mm | ± 10 % | max, 2, 41 mm | + 4, 76 mm, – 0 mm |
High Frequency Welding Solid Fin Tube Applications:
