Zhengzhou Huitong Pipeline Equipment Co.,Ltd.
Zhengzhou Huitong Pipeline Equipment Co., Ltd.
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Best price ASTM A240 ASME SA240 904L duplex steel plate sheet strip
A240 904L Chemical Composition, max %
| C | Mn | P | S | Si | Cr |
| 0.02 | 2.00 | 0.045 | 0.035 | 1.00 | 19.0-23.0 |
| Ni | Mo | N | Cu | Others | |
| 23.0-28.0 | 4.0-5.0 | 0.10 | 1.0-2.0 | ||
A240 904L Mechanical Properties
| Grade | Tensile Str., min, MPa | 0.2% Yield Str., min, MPa | E.L in 50mm, min % | max HRB | |
| A240 TP 904L | 490 | 220 | 35 | 90 |
SS 904L Sheets & Plates Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | KS | BS | AFNOR | EN |
| SS 904L | 1.4539 | N08904 | SUS 904L | STS 317J5L | 904S13 | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
Alloy 904L (UNS N08904) is a superaustenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments. The combination of high chromium and nickel content, coupled with additions of molybdenum and copper, assure good to excellent corrosion resistance. With its highly alloyed chemistry — 25% nickel and 4.5% molybdenum, 904L provides good chloride stress corrosion cracking resistance, pitting and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels.
Alloy 904L was originally developed to withstand environments containing dilute sulfuric acid. It also offers good resistance to other inorganic acids such as hot phosphoric acid as well as most organic acids. Alloy 904L is easily welded and processed by standard shop fabrication practices. 904L was originally developed to withstand environments containing dilute sulfuric acid, and is one of the few stainless steels that, at temperatures up to 95°F (35°C), provides full resistance in such environments within the entire concentration range of 0 to 100%. 904L also offers good resistance to a number of other inorganic acids, such as phosphoric acid and most organic acids. However, acids and acid solutions containing halide ions can be very aggressive, and the corrosion resistance of 317L, 317LMN and 904L may be insufficient.
