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Standard Specification for ASTM A959-2004 904L
| Grade | 904L |
| UNS | N08904 |
| Standard | ASTM A959-2004 |
| Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels | |
| Classification | Austenitic stainless steel |
| Introductions | 904L, super austenitic stainless steel is a low carbon, high nickel, molybdenum austenitic stainless steel. It has good activation – passivation transformation ability, excellent corrosion resistance, good corrosion resistance in non-oxidizing acids such as sulfuric acid, acetic acid, formic acid, phosphoric acid, and good pitting resistance in neutral chlorine-containing media. Due to the high nickel content, 904L has a high resistance to stress corrosion cracking in chloride solutions, concentrated hydroxide solutions and hydrogen sulphide rich environments. Can be used in pressure vessels, pipelines, heat exchangers, food industry, chemical industry and so on. Can be used to manufacture nuts and other fasteners |
| 904L Chemical Element Content (%) | ||||||||||
| Constituent | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | N |
| Min | – | – | – | – | – | 19 | 23 | 1 | 4 | – |
| Max | 0.02 | 1 | 2 | 0.04 | 0.03 | 23 | 28 | 2 | 5 | 0.01 |
| Condition | Tensile Strength | Yield stress | Elongation |
| σb | σs | δ | |
| Mpa | Mpa | % | |
| ≥490 | ≥216 | ≥35 |
| Approximate comparison table-Austenitic stainless steel | |||||||||||
| China | Japan | America | The International Standard Organization | France | European standard | Sweden | United Kingdom | ||||
| GB | ISC | JIS | ASTM/AISI | UNS | ISO | Numerical grade | NF EN/NF | EN | Numerical grade | SS | BS EN/BS |
| 015Cr21Ni26Mo5Cu2 | S31782 | SUS 890L | 904L | N08904 | X1NiCrMoCu25-20-5 | 4539-089-04-I | Z2NCDU25-20 | X1NiCrMoCu25-20-5 | 1.4539 | 2562 | 904S13 |
