904L stainless steel, также известный как UNS N08904 и W.Nr. 1.4539, is a high-alloy austenitic stainless steel with excellent corrosion resistance in aggressive environments. Its high levels of chromium, nickel, molybdenum, and copper make it highly resistant to sulfuric acid, chloride-induced pitting, and crevice corrosion.
904L is widely used in chemical processing, oil and gas, seawater systems, and pharmaceutical industries. It offers strong performance in acidic and chloride-rich environments, making it an ideal material for heat exchangers, piping, tanks, and components requiring durability and corrosion resistance.
| Элемент | % Present (in product form) |
| Углерод (C) | 0.02 |
| Кремний (Si) | 0.7 |
| Марганец (Mn) | 2 |
| Phosphorous (P) | 0.03 |
| Сера (S) | 0.01 |
| Хром (Cr) | 19.00 – 21.00 |
| Никель (Ni) | 24.00 – 26.00 |
| Азот (N) | 0.15 |
| Молибден (Mo) | 4.00 – 5.00 |
| Медь (Cu) | 1.20 – 2.00 |
| Железо (Fe) | Остальное |
| Удельная теплота (0-100°C) | 450 | Дж.кг-1.°K-1 |
| Теплопроводность | 11.5 | Вт.м -1.°K-1 |
| Тепловое расширение | 15.8 | мкм/мкм/°C |
| Модуль упругости | 190 | GPa |
| Удельное электрическое сопротивление | 9.52 | Ом-см |
| Плотность | 7.95 | г/см³ |
| Темпер | Отожжённый | |
|---|---|---|
| Растяжение Rm | 71 | ksi (мин) |
| Растяжение Rm | 490 | МПа (мин) |
| Р.п. 0,2% Урожайность | 32 | ksi (мин) |
| Р.п. 0,2% Урожайность | 220 | МПа (мин) |
| Удлинение (2" или 4D gl) | 35 | % (мин) |
| Seamless / Welded Pipe | ASTM A312 TP 904L |
| Seamless / Welded Tubing | ASTM A269 TP 904L |
| Пруток / стержень | ASTM A276 / A479 TP 904L |
| Forging | ASTM A182 F904L |
| Лист / пластина | ASTM A240 UNS N08904 |
| Welding Consumable | AWS A5.9 ER385 |
Standard product forms of 904L/N08904/1.4539 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at [email protected] Для получения полной информации
Russian 
English 
Korean 
Japanese 
Arabic 
Spanish 
German 
Portuguese 
French 
Italian