Зэвэрдэггүй ган, аустенит төрөл
S34700 (347) Stainless Steel Sheet
Columbium stabilizes this alloy making it immune to chromium carbide precipitation.
Alloy 347 is recommended for welded applications that can not tolerate a post anneal. The alloy can operate between 800-1600°F.
347 stainless steel is a high-performance austenitic stainless steel тэж niobium stabilization that ensures excellent corrosion resistance, mechanical strength, and high-temperature stability. Энэ нь өргөн хэрэглэгддэг chemical, industrial, aerospace, food processing, and high-temperature applications.
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347 Stainless Steel Related Specifications
| Систем / Стандарт | Улс / Бүс нутаг | Ангилал / Албан тушаал |
| AISI | АНУ | 347 |
| АНУ-ын Нэгдсэн Улсууд | Олон улсын | S34700 |
| EN / W.Nr. | Европ | 1.4550 |
| Нэр (англи хэл дээр) | Европ | X6CrNiNb18-10 |
| ASTM A240 | АНУ | 347 (plate, sheet, strip) |
| ASTM A182 | АНУ | F347 (forgings, flanges, fittings) |
| ASTM A213 | АНУ | TP347 (boiler / HX tubes) |
| ASTM A312 | АНУ | TP347 (seamless pipe) |
| ГБ | Хятад | 06Cr18Ni11Nb |
| JIS | Япон | SUS347 |
| BS | Их Британи | 347S31 |
| АФНОР | Франц | Z6CNb18-10 |
Хувийн шинж чанарууд
Химийн найрлага
S34700 Sheet
ASTM A240
| Химийн элемент | % Одоо |
| Нүүрстөрөгч (C) | 0.00 - 0.08 |
| Хромын (Cr) | 17.00 - 19.00 |
| Никель (Ni) | 9.00 - 13.00 |
| Манган (Mn) | 0.00 - 2.00 |
| Фосфор (P) | 0.00 - 0.04 |
| Үлэмж (S) | 0.00 - 0.03 |
| Кремний (Si) | 0.00 - 0.75 |
| Ниобиум (Коломбиум) (Nb) | 0.00 - 1.00 |
| Төмөр (Fe) | Тэнцвэр |
Механик шинж чанарууд
Sheet
ASTM A240
| Механик шинж чанар | Үнэ цэнэ |
| Баталгаажуулах стресс | 205 хамгийн бага MPa |
| Суналтын бат бэх | 515 Min МПа |
| Уртлалт A50 мм | 40 мин % |
Ерөнхий физик шинж чанарууд
| Физик шинж чанар | Үнэ цэнэ |
| Шигшүүр | 7.96 g/cm³ |
Applications of 347 Stainless Steel
347 stainless steel is a stabilized austenitic stainless steel containing niobium (columbium), which improves resistance to бөөм хоорондын зэврэлт after exposure to high temperatures. Its excellent mechanical properties and corrosion resistance make it suitable for a wide range of high-temperature and industrial applications.
1. High-Temperature Applications
Furnace components and heat exchangers
Boiler parts, superheater and evaporator tubes
Exhaust stacks and high-temperature ducting
Industrial ovens and kilns
2. Chemical and Petrochemical Industry
Processing equipment and piping in moderately corrosive environments
Pressure vessels and tanks for chemical storage
Heat-resistant piping carrying steam or hot liquids
3. Food and Beverage Processing
Equipment exposed to elevated temperatures
Heat exchangers and evaporators
Components requiring good corrosion resistance and stability at high temperature
4. Aerospace and Automotive
Exhaust systems and turbochargers
High-temperature components in engines and power plants
5. Industrial Equipment
Springs, fasteners, and structural components for high-temperature service
Mechanical equipment exposed to heat and corrosion simultaneously
6. Architectural Applications
Structures and components exposed to outdoor weather and moderate corrosive conditions
Decorative elements requiring durability and stability at elevated temperatures
Товч агуулга
347 stainless steel is ideal for high-temperature and industrial applications, хаана intergranular corrosion resistance, mechanical strength, and stability at elevated temperatures are critical. Common industries include chemical processing, food and beverage, aerospace, automotive, and industrial equipment.
Characteristics of 347 Stainless Steel
347 stainless steel is a stabilized austenitic stainless steel containing niobium (columbium), which enhances resistance to бөөм хоорондын зэврэлт after exposure to high temperatures. It offers good mechanical properties, excellent corrosion resistance, and high-temperature stability, making it suitable for demanding applications.
1. High-Temperature Stability
Маш сайн тэсвэрлэх чадвар бөөм хоорондын зэврэлт after exposure to temperatures of 425–870°C (800–1600°F)
Niobium stabilization prevents хромын карбидын шингэлэлт during welding and heat exposure
Suitable for furnace parts, heat exchangers, and boiler components
2. Хортон үйлдэлд тэсвэрлэх чадвар
Сайн тэсвэрлэх чадвартай oxidation, atmospheric corrosion, and mild chemical attack
Performs better than 304 and similar to 321 in high-temperature corrosive environments
Low susceptibility to pitting and crevice corrosion in moderately aggressive media
3. Механик шинж чанарууд
High strength and toughness, even at elevated temperatures
Can be cold-worked to improve strength
Excellent ductility for forming, bending, and shaping
4. Гандах чадвар
Easily welded using conventional methods: TIG, MIG, SMAW, or resistance welding
Niobium stabilization reduces risk of эмзэгжүүлэх in the heat-affected zone
Suitable for welded components in chemical, food, and high-temperature applications
5. Formability and Fabrication
Good cold and hot workability
Can be rolled, drawn, or pressed into complex shapes
Suitable for sheets, plates, tubes, and structural components
6. Heat Resistance
Дааж чадна continuous service up to 870°C (1600°F)
Resistant to scaling and oxidation in oxidizing atmospheres
Товч агуулга
347 stainless steel combines high-temperature stability, excellent corrosion resistance, and strong mechanical properties. Түүний niobium stabilization prevents intergranular corrosion, making it ideal for high-temperature industrial equipment, chemical processing, aerospace, and food processing applications.
Нэмэлт мэдээлэл
Бэлтгэл
Fabrication of 347 Stainless Steel
347 stainless steel is a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган designed to resist intergranular corrosion during welding and high-temperature service. It combines excellent corrosion resistance, good weldability, and mechanical strength, making it suitable for a wide range of fabrication processes in industrial and high-temperature applications.
1. Бүтээх
347 stainless steel has сайн хүйтэн хэлбэржих чадвар энэалласан нөхцөлд.
Can be bent, deep-drawn, stamped, and roll-formed.
Because of work-hardening, дунд зэргийн аннелинг may be required during extensive forming operations to restore ductility.
2. Таслах ба хайчлах
Can be cut with standard techniques such as shearing, sawing, and laser cutting.
Tools must be sharp to minimize work-hardening at the cut edges.
3. Машин боловсруулалт
347 is машин боловсруулахад дунд зэргийн хэцүү due to austenitic toughness and work-hardening tendency.
Ашиглах карбид багаж for better performance, proper feed rates, and cooling lubricants to control heat and tool wear.
4. Ганхалга
Excellent weldability with conventional processes: TIG, MIG, SMAW.
Титаны тогтворжуулалт сэргийлдэг бөөм хоорондын зэврэлт near the weld.
Дүүргэгч металлууд, жишээ нь 347 or 308L are commonly used.
Post-weld annealing is typically шаардлагагүй for corrosion resistance, but stress relief may be applied in high-temperature applications.
5. Хүйтэн боловсруулалт
Cold working increases strength significantly due to work-hardening.
Extensive cold work reduces ductility; дулааны боловсруулалт may be required to restore formability for further fabrication.
6. Hot Working
Hot working is typically performed between 1010–1175°C (1850–2150°F).
Proper temperature control ensures uniform mechanical properties and prevents grain growth.
7. Гадаргууг дуусгах
Can be supplied in a range of finishes (2B, BA, or polished).
Work-hardened areas may require additional finishing for aesthetics or corrosion resistance.
Товч агуулга
347 stainless steel is versatile and easily fabricated, offering excellent weldability, corrosion resistance, and strength. Its титанийн тогтворжуулалт makes it particularly suitable for welding and high-temperature applications, while its workability allows for forming, machining, and finishing across a wide range of industrial uses.
Гандах чадвар
Weldability of 347 Stainless Steel
347 stainless steel is a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган санал болгодог маш сайн гагнагддаг чанар. Its titanium content prevents the formation of chromium carbides during welding, reducing the risk of бөөм хоорондын зэврэлт in the heat-affected zone (HAZ). This makes 347 highly suitable for welded structures and components exposed to elevated temperatures.
1. Холимог гагналын процессууд
ТИГ (GTAW) – Preferred for precision welding and thin sections.
MIG (GMAW) – Common for thicker sections and high-productivity applications.
Хаалттай металлын цахилгаан дулаан гагнуур (SMAW) – Suitable for field and maintenance welding.
Цахилгаан эсэргүүцлийн гагнуур – Spot and seam welding can be used effectively.
2. Титаны тогтворжуулалтын давуу талууд
Titanium reacts with carbon to form stable titanium carbides.
Сэргийлнэ хромын карбидын шингэлэлт, avoiding sensitization in the HAZ.
Ensures corrosion resistance is maintained after welding, even without post-weld annealing.
3. Дүүргэгч материалын сонголт
Filler metals matching 347 are commonly used for optimum corrosion resistance.
ER347 or 308L filler rods are suitable depending on base material thickness and application.
Low-carbon fillers reduce carbide precipitation risk in general austenitic stainless steel applications.
4. Халаалтын оролт ба гажилт
347 has өндөр дулааны өргөжилт, which can lead to distortion if not controlled.
Ашиглах low to moderate heat input to reduce warping and maintain dimensional stability.
Adequate fixturing and sequence planning help minimize residual stresses.
5. Ганхалсны дараах боловсруулалт
Usually, post-weld annealing is шаардлагагүй because titanium stabilization protects against intergranular corrosion.
Stress relief may be applied for high-temperature service or when dimensional stability is critical.
6. Ганхах чадвартай холбоотой хэрэглээ
High-temperature boilers and furnace components
Химийн болон нефтийн боловсруулалтын тоног төхөөрөмж
Дулааны солилцогчид
Pressure vessels and piping systems requiring welded assemblies
Товч агуулга
347 stainless steel exhibits маш сайн гагнагддаг чанар due to its titanium stabilization, allowing it to maintain corrosion resistance in welded areas without the need for extensive post-weld heat treatment. Proper filler selection, heat control, and welding technique ensure strong, durable, and corrosion-resistant welds suitable for high-temperature and industrial applications.
Машинлах боломжтой байдал
Machinability of 347 Stainless Steel
347 stainless steel, a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган, has дунд зэргийн боловсруулах боломжтой байдал similar to other austenitic grades such as 304 and 321. While it is tougher and more work-hardening than carbon steels, careful tooling and machining practices allow for efficient processing and good surface finishes.
1. Ажлын хатуужилтын зан байдал
347 stainless steel exhibits work-hardening during cutting, which increases tool wear if not properly managed.
Continuous, consistent cutting helps prevent excessive hardening on the surface.
2. Тоног төхөөрөмжийн зөвлөмжүүд
Карбид багаж is preferred for higher productivity and tool life.
Өндөр хурдны ган (HSS) tools can be used at slower cutting speeds with careful feed control.
Positive rake angles reduce cutting forces and heat generation.
3. Зүсэх хурд ба тэжээх хурд
Slower cutting speeds than those used for carbon steels are recommended.
Ашиглах moderate to heavy feeds Хэрэгслийг тасралтгүй ажиллуулж, ажлын хатуужил үүсэхийг багасгах.
4. Хөргөлт ба тослолт
Австенит төрлийн зэвэрдэггүй гангууд нь дулааны дамжуулалт багатай, so heat control is critical.
Flood coolant or high-performance cutting oils help reduce heat, improve surface finish, and extend tool life.
5. Чипний үүсэл
Chips are typically хатуу ба урт нарийн ширхэгтэй, making them difficult to evacuate.
Use chip breakers or insert geometries designed for stainless steel to manage chips effectively.
6. Гадаргуугийн өнгөлгөө
Good surface finishes can be achieved with proper tool geometry, cutting parameters, and cooling.
Avoid dwell or pauses on the workpiece, as these can create hardened spots and reduce finish quality.
Товч агуулга
347 stainless steel has дунд зэргийн боловсруулах боломжтой байдал compared with other austenitic grades. Success in machining relies on sharp tools, controlled cutting parameters, proper cooling, and feed rates to counteract work-hardening and achieve high-quality finished components.
Зэврэлт тэсвэр
Corrosion Resistance of 347 Stainless Steel
347 stainless steel is a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган with excellent corrosion resistance. The titanium stabilization prevents chromium carbide precipitation during welding, reducing the risk of бөөм хоорондын зэврэлт, particularly in the heat-affected zone (HAZ). This makes 347 ideal for welded assemblies and high-temperature applications.
1. Ерөнхий зэврэлт тэсвэрлэх чадвар
Сайн ажилладаг atmospheric, industrial, and mildly corrosive environments.
Resistant to oxidation at moderate elevated temperatures.
Suitable for general chemical, petrochemical, and process equipment.
2. Intergranular Corrosion Resistance
Titanium binds with carbon to form stable titanium carbides.
Prevents chromium depletion at grain boundaries, which avoids эмзэгжүүлэх.
Especially beneficial in welded areas where intergranular corrosion is a concern.
3. Хлоридын эсэргүүцэл
Exhibits moderate resistance to chloride-induced нүхжилт ба цууралтын зэврэлт.
Not as resistant as Mo-bearing grades like 316, but better than carbon steels or unstabilized austenitic grades in welded components.
4. Өндөр температурын зэврэлт
Suitable for use in continuous service up to ~870°C (1600°F) in oxidizing atmospheres.
Titanium stabilization provides good resistance to карбидийн шингэлт and oxidation during high-temperature service.
5. Comparison to Other Austenitic Grades
Better corrosion resistance than 304 in welded conditions due to titanium stabilization.
Slightly less corrosion-resistant than 316 Хлоридын агууламж өндөр орчинд.
Superior intergranular corrosion resistance compared to unstabilized 321 or 304 stainless steels.
6. Applications Leveraging Corrosion Resistance
Дулааны солилцогчид болон зуухны бүрэлдэхүүн хэсгүүд
Химийн болон нефтийн химийн тоног төхөөрөмж
Шахалтын сав ба хоолойн системүүд
Components exposed to elevated temperatures or welding
Товч агуулга
347 stainless steel combines excellent general corrosion resistance with superior resistance to intergranular corrosion, making it highly suitable for welded and high-temperature applications. Titanium stabilization ensures reliable long-term performance, especially in industrial and chemical environments.
Хүйтэн боловсруулалт
Cold Working of 347 Stainless Steel
347 stainless steel is an austenitic, titanium-stabilized stainless steel with good cold-working properties. Cold working increases the material’s бат бэх, хатуулаг while reducing ductility. The titanium stabilization helps maintain corrosion resistance, even in heavily worked conditions.
1. Ажлын хатуужилтын зан байдал
347 stainless steel ажиллахад хатууждаг during cold deformation, although slightly less aggressively than 301 or 304.
Strength increases significantly with deformation, but ductility decreases.
2. Ерөнхий ханиадны ажиллах процессүүд
Гүйлгэх: For sheets, strips, and plates.
Зураг: For wires, tubes, and rods.
Мөчирч, хэлбэржүүлэх: For clips, springs, and structural components.
Штамплах ба гүн татах: For complex parts.
3. Механик шинж чанарын хяналт
Cold working allows precise adjustment of Суналтын бат бэх, хөнгөлтийн бат бэх, хатуулаг.
Extensive cold working may require дунд зэргийн аннелинг to restore ductility for further forming.
4. Хортон үйлчилгээнд тэсвэрлэх чадварт үзүүлэх нөлөө
Титаны тогтворжуулалт сэргийлдэг хромын карбидын шингэлэлт, Их хэмжээний хүйтэн боловсруулалт хийгдсэний дараа ч зэврэлтэнд тэсвэртэй хэвээр байна.
Unlike unstabilized austenitic grades, 347 maintains resistance to intergranular corrosion in welded or heavily worked areas.
5. Хэлбэржүүлсний дараах анхаарах зүйлс
In highly cold-worked parts, шийдлийн халаах can be performed to relieve residual stresses and restore formability if required.
Cold working may also induce some соронзон чанар due to martensitic transformation, though minimal in 347 compared to 301.
6. Applications Utilizing Cold Work
Springs and clips
Structural components requiring high strength
Industrial equipment requiring formability and corrosion resistance
Tubes, rods, and wire for chemical and high-temperature service
Товч агуулга
347 stainless steel exhibits good cold-working characteristics, allowing it to achieve higher strength through work hardening while maintaining corrosion resistance thanks to titanium stabilization. Proper management of deformation and occasional annealing enables high-performance components for industrial and high-temperature applications.
Дулааны боловсруулалт
Heat Treatment of 347 Stainless Steel
347 stainless steel is a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган. Unlike martensitic or precipitation-hardening grades, it is Уламжлалт дулааны боловсруулалтаар хатууруулаагүй. Heat treatment is mainly used to restore ductility, relieve stresses, and maintain corrosion resistance, especially after cold working or welding.
1. Эрдэсжүүлэлт / Шингэн шинж чанарыг сайжруулах боловсруулалт
Зорилго:
Relieve stresses from cold working or forming
Суналттай байдлыг сэргээх
Dissolve any unwanted precipitates
Ердийн температур: 1010–1120°C (1850–2050°F)
Хөргөлт: Rapid air or water quenching to preserve a fully austenitic structure
Үр нөлөө:
Returns mechanical properties to annealed condition
Maintains corrosion resistance due to titanium stabilization
2. Стресс тайлах
Зорилго: Бүтээх, нугалах эсвэл гагнахаас үүссэн үлдэгдэл стрессийг бууруулах
Температурын хүрээ: 450–650°C (840–1200°F)
Үр нөлөө: Minimizes distortion and reduces the risk of stress corrosion cracking without significantly changing mechanical properties
3. Хүйтэн боловсруулсан нөхцөлд анхаарах зүйлс
Cold working increases strength but reduces ductility.
Дунд зэргийн аннелинг may be performed between forming operations to restore ductility and workability.
Repeated cold work and annealing allow precise control over strength and hardness.
4. Ганхалсны дараах дулааны боловсруулалт
Welding 347 stainless steel typically does not require post-weld annealing for corrosion resistance, thanks to titanium stabilization.
Стресс тайлах халаалтыг өндөр температурын нөхцөлд эсвэл хэмжээсийн тогтвортой байдал чухал үед хэрэглэж болно.
5. Хязгаарлалт
Дулааны боловсруулалт хийдэг хатуурал мэдэгдэхүйц нэмэгдэхгүй; 347 relies on cold working for strength enhancement.
Prolonged high-temperature exposure above ~500°C can reduce the effects of prior cold work.
Товч агуулга
Heat treatment of 347 stainless steel is focused on стресс тайлалт, уян хатан чанарыг сэргээх, зэврэлтэнд тэсвэрлэх чадварыг хадгалах, rather than hardening. Solution annealing and controlled stress relief help ensure optimal mechanical and chemical performance for welded, cold-worked, and high-temperature components.
Дулаан тэсвэрлэх чадвар
Heat Resistance of 347 Stainless Steel
347 stainless steel is a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган with good high-temperature properties. It is specifically designed for applications requiring resistance to carbide precipitation and oxidation Өндөр температурт.
1. Тасралтгүй үйлчилгээний температур
Үргэлжилсэн үйлчилгээнд тохиромжтой оксижуулагч орчин ~870°C (1600°F) хүртэл.
Титаны тогтворжуулалт сэргийлдэг бөөм хоорондын зэврэлт and maintains strength during long-term exposure to elevated temperatures.
2. Хуваагдалтай илчлэл
Зүтгэж чадна intermittent exposure up to ~925°C (1700°F) without significant scaling or degradation.
Useful for components subject to occasional thermal cycling or transient heating.
3. Оксидацийн эсэргүүцэл
a үүсгэдэг Хамгаалалтын хромын исэл давхарга that resists scaling in oxidizing environments.
Not suitable for prolonged exposure to strongly oxidizing or sulfidizing atmospheres at extreme temperatures; for these, specialized high-temperature grades such as 310 are recommended.
4. Механик шинж чанарт үзүүлэх дулааны нөлөө
Retains good tensile strength and ductility at elevated temperatures.
High-temperature exposure does not significantly reduce corrosion resistance, due to titanium stabilization.
Prolonged exposure above 900°C can lead to grain growth, which may reduce toughness.
5. Дулаан тэсвэрлэх чадвартай холбоотой хэрэглээ
Boiler and furnace components
Дулааны солилцогчид
Химийн болон нефтийн боловсруулалтын тоног төхөөрөмж
High-temperature piping and welded assemblies
6. Бусад аустенит ангиудтай харьцуулалт
Халуунд тэсвэрлэх чадвар нь better than 304 in welded or high-temperature applications.
Slightly lower high-temperature strength than 310 but more corrosion-resistant than unstabilized 304 in the HAZ.
Titanium stabilization ensures reliability in long-term service at elevated temperatures.
Товч агуулга
347 stainless steel provides excellent high-temperature performance up to ~870°C for continuous service. Its titanium stabilization prevents carbide precipitation, maintaining corrosion resistance and mechanical strength in welded and heat-exposed components, making it ideal for industrial and high-temperature applications.
Хот Воркинг
Heat Resistance of 347 Stainless Steel
347 stainless steel is a титанаар тогтворжуулсан аустенит төрлийн зэвэрдэггүй ган with good high-temperature properties. It is specifically designed for applications requiring resistance to carbide precipitation and oxidation Өндөр температурт.
1. Тасралтгүй үйлчилгээний температур
Үргэлжилсэн үйлчилгээнд тохиромжтой оксижуулагч орчин ~870°C (1600°F) хүртэл.
Титаны тогтворжуулалт сэргийлдэг бөөм хоорондын зэврэлт and maintains strength during long-term exposure to elevated temperatures.
2. Хуваагдалтай илчлэл
Зүтгэж чадна intermittent exposure up to ~925°C (1700°F) without significant scaling or degradation.
Useful for components subject to occasional thermal cycling or transient heating.
3. Оксидацийн эсэргүүцэл
a үүсгэдэг Хамгаалалтын хромын исэл давхарга that resists scaling in oxidizing environments.
Not suitable for prolonged exposure to strongly oxidizing or sulfidizing atmospheres at extreme temperatures; for these, specialized high-temperature grades such as 310 are recommended.
4. Механик шинж чанарт үзүүлэх дулааны нөлөө
Retains good tensile strength and ductility at elevated temperatures.
High-temperature exposure does not significantly reduce corrosion resistance, due to titanium stabilization.
Prolonged exposure above 900°C can lead to grain growth, which may reduce toughness.
5. Дулаан тэсвэрлэх чадвартай холбоотой хэрэглээ
Boiler and furnace components
Дулааны солилцогчид
Химийн болон нефтийн боловсруулалтын тоног төхөөрөмж
High-temperature piping and welded assemblies
6. Бусад аустенит ангиудтай харьцуулалт
Халуунд тэсвэрлэх чадвар нь better than 304 in welded or high-temperature applications.
Slightly lower high-temperature strength than 310 but more corrosion-resistant than unstabilized 304 in the HAZ.
Titanium stabilization ensures reliability in long-term service at elevated temperatures.
Товч агуулга
347 stainless steel provides excellent high-temperature performance up to ~870°C for continuous service. Its titanium stabilization prevents carbide precipitation, maintaining corrosion resistance and mechanical strength in welded and heat-exposed components, making it ideal for industrial and high-temperature applications.
