BÖHLER A962RC (Alloy 904L, UNS N08904) is a super-austenitic stainless steel designed for a medium to high level of corrosion resistance. The alloy contains high levels of chromium and nickel with additions of molybdenum and copper to provide higher corrosion resistance in certain media.
The alloy is produced to low carbon levels for use in the welded condition as in welded vessels and other large and complex fabrications.
No post-weld heat treatment required. The high nickel (25%) and molybdenum (4.5%) contents of BÖHLER A962RC provide good resistance to chloride stress corrosion cracking. The Chromium, molybdenum and nickel levels provide general corrosion restistance and restistance to chloride pitting corrosion above the level of Types 316 and 317 in many media. The copper addition provides added resistance to reducing media such as hot phosphoric acid and dilute sulfuric acid.
Austenitic Ni-Cr-Mo-Cu-steel with low carbon content which resists intergranular corrosion in the temperature range up to 400°C. No post-weld heat treatment required. Possesses very good resistance to sulphuric acid of any concentration up to about 60°C, as well as to phosphoricc acid and organic acids. Excellent resistance to stress corrosion cracking, and to pitting and crevice corrosion in media containing chloride ions. For optimum resistance, surfaces should be pickled.
| Market grade | SEL | EN | UNS |
|---|---|---|---|
| 904L | 1.4539 | X1NiCrMoCu25-20-5 | N08904 |
| EN ISO | ASTM | ASTM |
|---|---|---|
| 10088-3 | A182/A182M | A479/A479M |
| C | Si | Mn | P | S | Cr | Mo | Ni | Cu | N | |
|---|---|---|---|---|---|---|---|---|---|---|
| max. 0.020 | max. 1.00 | max. 2.00 | max. 0.045 | max. 0.035 | 19.0 to 23.0 | 4.0 to 5.0 | 23.0 to 28.0 | 1.0 to 2.0 | max. 0.10 |
Information on Long Products ) Presented data refer exclusively to long products. Please observe the detailed explanations at the end of the data sheet (pdf).
