SS 321 Поставщики пластин
SS 321 plate is a heat-resistant austenitic stainless steel with titanium stabilization, offering excellent resistance to intergranular corrosion and oxidation at high temperatures. Its mechanical properties and chemical composition make it suitable for aerospace, теплообменники, сосуды под давлением, and petrochemical equipment. For projects involving high-temperature welded service, SS 321 remains a reliable stainless steel plate choice.
- Описание
SS 321 plate is a titanium-stabilized austenitic stainless steel plate designed for applications requiring excellent resistance to high temperatures and intergranular corrosion. It is widely used in industries such as aerospace, petrochemical processing, теплообменники, и сосуды под давлением. По сравнению со стандартным 304 нержавеющая сталь, SS 321 offers improved stability at elevated temperatures because of its titanium addition.
What Is SS 321 Тарелка?
SS 321 plate is an austenitic chromium-nickel stainless steel with titanium added as a stabilizing element. The titanium combines with carbon to prevent chromium carbide precipitation during welding or prolonged exposure to temperatures between 427°C and 816°C. Это делает 321 stainless steel suitable for welded components operating in high-temperature environments.
The material has good formability, отличная свариваемость, and strong oxidation resistance. It is commonly supplied in annealed plate form for fabrication and industrial processing.
Chemical Composition of SS 321 Тарелка
The chemical composition of SS 321 plate provides excellent heat resistance and corrosion performance.
| Элемент | Содержание (%) |
|---|---|
| Углерод (С) | ≤ 0.08 |
| Хром (Кр) | 17.0 – 19.0 |
| Никель (В) | 9.0 – 12.0 |
| Марганец (Мин.) | ≤ 2.00 |
| Кремний (И) | ≤ 0.75 |
| Фосфор (П) | ≤ 0.045 |
| сера (С) | ≤ 0.03 |
| Титан (Из) | 5×C min – 0.70 |
| Железо (Фе) | Баланс |
Titanium stabilization is the key feature that distinguishes SS 321 from 304 нержавеющая сталь.
Mechanical Properties of SS 321 Тарелка
SS 321 plate combines good strength with excellent high-temperature stability.
| Свойство | Типичное значение |
|---|---|
| Предел прочности | ≥ 515 МПа |
| Предел текучести | ≥ 205 МПа |
| Удлинение | ≥ 40% |
| Твердость | ≤ 217 полупансион |
| Плотность | 7.93 г/см³ |
| Melting Range | 1398 – 1454°C |
The material maintains good mechanical performance at both ambient and elevated temperatures.
Основные характеристики производительности
Высокая термостойкость
SS 321 plate is specifically developed for service in elevated temperature conditions. It performs well in continuous exposure up to approximately 870°C.
Межкристаллитная коррозионная стойкость
The titanium content prevents carbide precipitation after welding, reducing the risk of intergranular corrosion in heat-affected zones.
Отличная свариваемость
SS 321 can be welded using standard stainless steel welding processes without requiring post-weld annealing in many applications.
Устойчивость к окислению
The chromium-rich composition provides good oxidation resistance in high-temperature atmospheres.
Common Applications of SS 321 Тарелка
SS 321 stainless steel plate is commonly used in industrial sectors requiring heat resistance and long-term durability.
- Выхлопные системы самолетов
- Компоненты реактивного двигателя
- Теплообменники
- Boiler casings
- Сосуды под давлением
- Химическое технологическое оборудование
- Детали печи
- Компенсаторы
- Высокотемпературные трубопроводы
- Petrochemical refinery equipment
The material is widely selected for fabricated components exposed to thermal cycling.
SS 321 Plate vs 304 Нержавеющая сталь
| Особенность | SS 321 Тарелка | 304 Нержавеющая сталь |
|---|---|---|
| Структура | Аустенитный | Аустенитный |
| Titanium Stabilized | Да | Нет |
| Теплостойкость | Выше | Стандартный |
| Welded High-Temp Service | Отличный | Умеренный |
| Коррозионная стойкость | Высокий | Высокий |
| Типичное использование | High-temp equipment | Общепромышленное использование |
SS 321 is preferred when welded components must operate continuously at elevated temperatures.
Typical Plate Specifications
Common available dimensions for SS 321 stainless steel plate include:
| Толщина | Ширина | Длина |
|---|---|---|
| 3 мм – 50 мм | 1000 мм – 2000 мм | 2000 мм – 6000 мм |
The plate can also be processed by cutting, полировка, изгиб, and custom fabrication for industrial applications.
