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904L stainless steel別名UNS N08904 および 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.
| エレメント | % Present (in product form) |
| 炭素 (C) | 0.02 |
| ケイ素 (Si) | 0.7 |
| マンガン (Mn) | 2 |
| Phosphorous (P) | 0.03 |
| 硫黄 (S) | 0.01 |
| クロム (Cr) | 19.00 – 21.00 |
| ニッケル (Ni) | 24.00 – 26.00 |
| 窒素（N） | 0.15 |
| モリブデン (Mo) | 4.00 – 5.00 |
| 銅 (Cu) | 1.20 – 2.00 |
| 鉄 (Fe) | バランス |
| 比熱（0-100） | 450 | J.kg-1.°K-1 |
| 熱伝導率 | 11.5 | W.m -1.°K-1 |
| 熱膨張 | 15.8 | μm/μm/°C |
| 弾性係数 | 190 | GPa |
| 電気抵抗率 | 9.52 | オーム・cm |
| 密度 | 7.95 | g/cm³ |
| テンパー | 焼きなまし | |
|---|---|---|
| 引張強度 | 71 | ksi (min) |
| 引張強度 | 490 | MPa（分） |
| R.p. 0.2% 収量 | 32 | ksi (min) |
| R.p. 0.2% 収量 | 220 | MPa（分） |
| 伸び（2インチまたは4Dグローブ） | 35 | %（分） |
| Seamless / Welded Pipe | ASTM A312 TP 904L |
| Seamless / Welded Tubing | ASTM A269 TP 904L |
| 棒/ロッド | ASTM A276 / A479 TP 904L |
| Forging | ASTM A182 F904L |
| シート/プレート | 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] 詳細情報をご覧になるには
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