904L
904l stainless steel is high purity steel with low sulphur content and also non-stabilized austenitic stainless steel with low carbon content. Alloy 904L is super-austenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments.
| USA | JP | DE | EUR | CN |
|---|---|---|---|---|
| ASTM | JIS | DIN | EN | GB |
| 940L | SUS 890L | - | 1.4539 | 015Cr21Ni26Mo5Cu2 |
Chemical Composition
The typical chemical composition is shown in the table below.
| Grade | Standard | 904L Chemical Composition | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | Cr | Ni | P | S | Mo | Others | ||
| ≤ % | ≤ % | % | % | % | ≤ % | ≤ % | ≤ % | % | ||
| 904L | ASTM A240 | 0.02 | 1 | 2 | 19 - 23 | 23 - 28 | 0.045 | 0.035 | 4 - 5 | Cu: 1.0 - 2.0 |
| 1.4539 | EN 10088-2 | 0.02 | 0.7 | 2 | 19 - 21 | 24 - 26 | 0.045 | 0.01 | 4 - 5 | Cu: 1.0 - 2.0 |
| SUS 890L | JIS G 4304 | JIS G 4305 | 0.02 | 1 | 2 | 19 - 23 | 23 - 28 | 0.045 | 0.03 | 4 - 5 | Cu: 1.0 - 2.0 |
Mechanical Properties
The mechanical properties are given in the table below.
| Grade | Standard | 904L Mechanical Properties | ||||
|---|---|---|---|---|---|---|
| Tensile Strength | Yield Strength 0.2% | Elongation >% | Hardness | |||
| (MPa) ≥ | (MPa) ≥ | HRB ≤ | HB ≤ | |||
| 904L | ASTM A240 | 490 | 220 | 36 | 90 | 150 |
| 1.4539 | EN 10088-2 | 520 | 220 | 30 | 90 | 220 |
| SUS 890L | JIS G 4304 | JIS G 4305 | 490 | 215 | 35 | 90 | 187 |
Properties & Typical Applications
Type 904L is low in carbon content (0.020% Max), no carbide is precipitated under normal heat treatment and welding conditions. It has good activation-passivation transformation ability and excellent corrosion resistance. It has good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid and phosphoric acid. It has good pitting resistance in neutral medium containing chloride ions, and has good crevice corrosion resistance and stress corrosion resistance. The steel is widely used in petroleum, petrochemical equipment, seawater treatment equipment, paper industry equipment, sulfuric acid, nitric acid equipment, acid making, pharmaceutical industry and other chemical equipment, pressure vessel, food equipment and so on.