- OCTG
Specialty product_connection
1. Austenitic Stainless Steel
Austenitic stainless steel is used widely for various usages in general corrosion environment.
| Grade | Chemical Composition | Applicable Standard (ASTM/ASME) |
EN, etc. | Characteristics | Example of applications | |
| 304 | 18Cr-8Ni | S30400 | 1.4301 | Basic stainless steel grade | General purpose for numerous applications | |
| 304H | 18Cr-8Ni-High C | S30409 | 1.4948 | Basic stainless steel grade | General purpose for numerous applications | |
| 304L | 18Cr-8Ni-Low C | S30403 | 1.4307 | Intergranular corroison resistance | General purpose for numerous applications | |
| 304N | 18Cr-8Ni-N | S30451 | 1.4315 | High Strength | ||
| 304LN | 18Cr-8Ni-Low C-N | S30453 | 1.4311 | Intergranular corroison resistance, high strength | ||
| 309H | 22Cr-12Ni | S30909 | 1.4829 | Oxidation resistance | Radiant tubes | |
| 309S | 22Cr-12Ni | S30908 | Oxidation resistance | Radiant tubes | ||
| 310H | 25Cr-20Ni | S31009 | 1.4842 | Oxidation resistancece | Radiant tubes, boiler heater tubes | |
| 310S | 25Cr-20Ni | S31008 | Oxidation resistancece | Radiant tubes, boiler heater tubes | ||
| 316 | 18Cr-12Ni-2Mo | S31600 | 1.4401 | Corrosion resistance | LNG plant pipes, boilers and chemical industry tubes and pipes | |
| 316H | 18Cr-12Ni-2Mo-High C | S31609 | 1.4918 | Corrosion resistance | LNG plant pipes, boilers and chemical industry tubes and pipes | |
| 316L | 18Cr-12Ni-2Mo-Low C | S31603 | 1.4404 | Corrosion resistance | LNG plant pipes, boilers and chemical industry tubes and pipes | |
| 316Ti | 18Cr-12Ni-Mo-Ti | S31635 | 1.4571 | Intergranular corrosion resistance | ||
| 317 | 18Cr-12Ni-3Mo | S31700 | Pitting corrosion resistance | Chemical tanler pipes | ||
| 317L | 18Cr-12Ni-3Mo-Low C | S31703 | 1.4438 | Pitting corrosion resistance | Chemical tanler pipes | |
| NEXAGE™317CU | 18Cr-16Ni-3.5Mo-4Cu | S31730 | Sulfuric and hydrochloric acid dew point corrosion resistance | Exhaust gas pipes and heat exchanger tubes for sulfur fuel and boimass boilers | ||
| NEXAGE™317AP | 17Cr-14Ni-3Mo-0.3Nb-N | S31740 (ASME CC3038) |
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Petroleum refining plant furnace tubes | ||
| 321 | 18Cr-9Ni-Ti | S32100 | 1.4541 | Intergranular corrosion resistance | Chemical plant pipes | |
| 321H | 18Cr-9Ni-Ti-High C | S32109 | 1.4940 | High-temperature strength | Boiler heater tubes and reheater tubes | |
| 347 | 18Cr-9Ni-Nb | S34700 | 1.4550 | Intergranular corrosion resistance | Chemical plant pipes and tubes | |
| 347H | 18Cr-9Ni-Nb-High C | S34709 | 1.4942 | High-temperature strength | Boiler heater tubes and reheater tubes | |
| 347AP | 18Cr-10Ni-0.3Nb-Extra low C | S34751 |
Polythionic acid stress corrosion crack resistance, weld crack resistance and stress relaxation crack resistance |
Petroleum refining plant furnace tubes | ||
| NEXAGE™347AlPha | 18Cr-11Ni-3Cu-Mo-Nb-B-N-Extra low C | S34752 (ASME CC2984) |
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Petroleum refining plant furnace tubes | ||
| YUS™270 | 20Cr-18Ni-6Mo-0.7Cu-0.2N- Low C | S31254 | 1.4547 | High pitting corrosion resistance |
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| 254SMO | 20Cr-18Ni-6Mo-Cu-N | S31254 | 1.4547 | High pitting corrosion resistance | Seawater heat exchanger tubes | |
| HYDREXELTM | 22Cr-13Ni-5Mn-2Mo-0.3N | TPXM-19 | Hydrogen embrittlement resistance and high strength | High pressure gaseous hydrogen supply tubes for hydrogen stations | ||
| HYDLIQUIDTM | 22Cr-13Ni-5Mn^2Mo-0.3N | TPXM-19 | Hydrogen embrittlement resistance and high low-temperature toughness | Liquefied hydrogen, LNG plant pipes | ||
| 310MoLN | 25Cr-22Ni-2Mo-N | S31050 | 1.4466 | Intergranular corrosion resistance | Urea reactor tubes |
2. Ferritic, Maritensitic Stainless Steel
Ferritic Stainless Steel has higher Stress Corrosion Cracking resistance than Type 304, widely used for heat exchanger tubes.
| Grade | Chemical Composition | Applicable Standard (ASTM/ASME) |
EN, etc. | Characteristics | Example of applicatoins |
| 430 | 18Cr | S43000 | 1.016 | Chloride corrosion resistance and stress corrosion crack resistance | Water heater pipes |
| 444 | 19Cr-2Mo-Ti/Nb | S44400 | 1.4521 | Chloride corrosion resistance and stress corrosion crack resistance | Water heater pipes |
| YUS™190 | 19Cr-2Mo-Ti-Nb-Extra Low C-Low N | S44400 | 1.4521 | Stress corrosion crack resistance (general corroison resistance at SUS304 or higher) |
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| 446 | 25Cr-N | S44600 | Chloride corrosion resistance and stress corrosion crack resistance | Water heater pipes |
3. Duplex Stainless Steel
Duplex stainless steel has higher strength, corrosion resistance (pitting ) than conventional austenitic stainless steels.
| Grade | Chemical Composition | Applicable Standard (ASTM/ASME) |
EN, etc. | Characteristics | Example of applications |
| YUS™2120 | 21Cr-2Ni-3Mn-Cu-N | JIS G3459 SUS821L1TP |
High corrosion resistance(stress corrosion crack general corosion and crevice corrosion resistance) | Heat exchanger for various chemical plants | |
| YUS™2351 | 23Cr-5Ni-1Mo-N | JIS G3459 SUS329J1TP |
High corrosion resistance(stress corrosion crack general corosion and crevice corrosion resistance) | Heat exchanger for various chemical plants | |
| YUSTMDX1 | 22Cr-5Ni-3Mo-0.13Cu-Low C | S31803 | JIS G3463 SUS329J3LTB |
High corrosion resistance(stress corrosion crack general corosion and crevice corrosion resistance) | Heat exchanger for various chemical plants |
| 329J3L | 22Cr-5Ni-3Mo-0.15N | S31803 | 1.4462 NORSOK M-630/M-650 |
High strength, and High corrosion resistance | Various heat exchanger tubes |
| DP11A | 24Cr-4Ni-Mo-Cu-N | High corrosion resistance(stress corrosion crack general corosion and crevice corrosion resistance) | Heat exchanger for various chemical plants | ||
| 329J4L | 25Cr-7Ni-3Mo-0.2N | S31260 | High strength, and High corrosion resistance | Various heat exchanger tubes | |
| S31500 | 18.5Cr-5Ni-2.7Mo | S31500 | High strength, and High corrosion resistance | Various heat exchanger tubes | |
| S32205 | 22.5Cr-6Ni-3Mo-0.2N | S32205 | 1.4462 NORSOK M-630/M-650 |
High strength, and High corrosion resistance | Various heat exchanger tubes |
| S32750 | 25Cr-7Ni4Mo-0.3N | S32750 | 1.4410 NORSOK M-630/M-650 |
High strength, and High corrosion resistance | Seawater desalination plant pipes |
| DP12 | 25Cr-7Ni-2.7Mo-W-N | S31260 | High corrosion resistance (Urea corrosion and stress corrosion crack resistance) | Urea reactor tubes | |
| DP3 DP3N |
25Cr-7Ni-3.3Mo-W-N | S31260 | High corrosion resistance (Pitting corrosion, seawater and crevice corrosion resistance) | Seawater heat exchanger tubes for various chemical plants | |
| DP3W | 25Cr-7Ni-3.2Mo-2W-N | S39274 ASME CC2427 |
NORSOK M-630/M-650 |
High corrosion resistance (Pitting corrosion, seawater and crevice corrosion resistance) | Umbilical tubes and seawater heat exchanger tubes |
| DP28W™ | 27.5Cr-7.7Ni-2.2W-Mo-N | S32808 ASME CC2496 |
High corrosion resistance (Urea corrosion and stress corrosion crack resistance) | Urea reactor tubes |
4. High-Ni, Ni-based Alloy
- High-Ni alloy like Alloy 825 has higher corrosion and strength in high temperature.
- Ni-based alloy is applied to pipes and tubes for chemical plants where corrosion is particularly severe.
| Grade | Chemical Composition | Applicable Standard (ASTM/ASME) |
EN, etc. | Characteristics | Example of applications |
| 800 | 20Cr-30Ni-Ti | N08800 | 1.4558 | High corrosion resistance | |
| 800H | 20Cr-30Ni-Ti-High C | N08810 | 1.4876 | High strength, high corrosion resistance | Chemical plant heater and reheater tubes |
| 904L | 20Cr-25Ni-4.5Mo-Cu | N08904 | 1.4539 | High corrosion resistance | Various heat exchanger tubes |
| 28 | 27Cr-31Ni-3.5Mo-Cu | N08028 | 1.4563 | High corrosion resistance | Various heat exchanger tubes |
| 20 | 20Cr-35Ni-2Mo-3Cu-Nb | N08020 | 2.4660 | High corrosion resistance | |
| 825 | 20Cr-42Ni-3Mo-2Cu-Ti | N08825 | 2.4858 | High corrosion resistance and stress corrosion crack resistanece | Heat exchanger tubes fo petroleum refining |
| NEXAGE™HR24 | 25Cr-38Ni-Mo-Si | Oxidation resistance, carburization resistance, and high temperature strength (700 to 1100 deg. C) | Cracking tubes for ethylene plants | ||
| NEXAGE™845 | 22.5Cr-47Ni-3Cu-6Mo-3.5W | N06845 (ASME CC2794) |
Pitting corrosion resistance and acid resistance (sulfuric acid, hydrochliric acid, nitric acid, fomic acid etc.) | Highly corrosion resistant pipes nad heat exchanger tubes for chemical industry | |
| 600 | 15Cr-8Fe-Ni base | N06600 | 2.4816 | Oxidation resistance | Thermocouple protection tubes |
| 601 | 23Cr-1.4Al-Ni base | N06601 | 2.4581 | Oxidation resistance and carburization resistance | |
| 625 | 22Cr-9Mo-Ni base | N06625 | 2.4856 | High corrosion resistance and stress corrosion crack resistance | |
| 690 | 29Cr-9Fe-Ni base | N06690 | 2.4642 | High corrosion resistance | Steam generator tubes for PWR power plants |
| NEXAGE™696 | 30Cr-60Ni-2Cu-1.5Si | N06696 (ASME CC2652) |
Metal dusting corrosion resistance, caburization resistance, and high-temperature strength |
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| C22 | 21Cr-13Mo-3W-Ni base | N06022 | 2.4602 | High acid resistance | Heat exchanger tubes for chemical plants |
| 276 | 15.5Cr-16Mo-5Fe-Ni base | N10276 | 2.4819 | High acid resistance | Heat exchanger tubes for chemical plants |
| 200 | Ni (Annealed) | N02200 | 2.4066 | High corrosion resistance | Heat exchanger tubes for caustic soda and hydrogen chloride plants |
| 201 | Ni-Low C | N02201 | 2.4068 | High corrosion resistance | Heat exchanger tubes for caustic soda and hydrogen chloride plants |
| NEXAGE™201 | Ni-Low C-Nb | N02201 | 2.4068 | High strength (Easy handling) | Heat exchanger tubes for caustic soda and hydrogen chloride plants |