Louis Metals produces and delivers top-quality Stainless Steel 904L Forgings from Houston, USA, for high-performance corrosion-resistant parts for industrial applications. Grade 904L (UNS N08904) is a non-stabilized austenitic stainless steel containing high nickel and added molybdenum and copper for superior resistance to aggressive acids, including sulfuric acid. Our 904L forgings are manufactured according to ASTM A182 specifications and customized to customer orders in flanges, rings, blocks, and custom configurations. Louis Metals guarantees greater strength, close tolerances, and excellent resistance to corrosion in each of its forging operations, serving the chemical processing, pharmaceuticals, and marine engineering industries.
Stainless Steel 904L has 19–23% chromium, 23–28% nickel, 4–5% molybdenum, 1–2% copper, and low carbon (<0.02%). It provides tensile strength approximately 490–710 MPa and yield strength about 220 MPa. Its superior nickel and molybdenum composition render unparalleled resistance to pitting, crevice corrosion, and stress corrosion cracking in acidic and chloride-bearing environments. 904L is also non-magnetic, possesses good formability, and has good resistance in higher temperatures. Louis Metals delivers uniform microstructure and strength by superior forging and heat treatment techniques.
| Standard | ASTM A182, ASME SA182 |
| Specification | DIN, ASTM, BS and all International Standards |
| Flat bar blocks | up to 27″ width and 15,000 lbs. |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs. |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs. |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
| Grade | C | Mn | Si | P | S | Cr | MO | Ni | Cu | |
| 904L | min. | – | – | – | – | – | 19.0 | 4.0-5.0 | 23.0 | 1.0 |
| max. | 0.20 | 2.0 | 1.0 | 0.045 | 0.035 | 23.0 | 28.0 | 2.0 | ||
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | KS | AFNOR | EN |
| SS 904L | 1.4539 | N08904 | SUS 904L | 904S13 | STS 317J5L | Z2 NCDU 25-20 | X1NiCrMoCu25-20-5 |
Yes, Stainless Steel 904L can be forged into custom shapes. Through advanced forging techniques, it can be shaped into various configurations to meet specific design and performance requirements for different applications.
Stainless Steel 904L forgings require minimal maintenance. Regular cleaning with mild detergents, periodic inspections for corrosion, and avoiding high-temperature exposure to chloride-rich environments ensure optimal performance and longevity.
Yes, Stainless Steel 904L forgings can be customized for specific applications. They can be tailored in size, shape, and finish to meet unique requirements, ensuring optimal performance in various industries.
904L Forgings are best suited for chemical processing plants that work with aggressive acids, such as sulfuric, phosphoric, and nitric acids. Common uses are flanges, valves, heat exchanger components, and reactor equipment in the pharmaceutical, pulp and paper, petrochemical, and offshore industries. The corrosion resistance also places them in marine hardware and seawater cooling systems. For the food, beverage, and brewing sectors, 904L provides a corrosion-free, hygienic solution. Louis Metals offers special 904L forgings designed to perform under corrosive conditions with long life and minimal maintenance needs.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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