The composition of Stainless Steel 904L Forgings includes a high nickel content (23–28%), chromium (19–23%), molybdenum (4–5%), copper (1–2%), along with manganese, silicon, and a low carbon content (<0.02%). This unique blend guarantees outstanding resistance to corrosion, pitting, and stress cracking. The alloy showcases excellent toughness and strength, even under high temperatures. Typical mechanical properties feature a tensile strength ranging from 490–710 MPa, a yield strength of about 220 MPa, and an elongation of roughly 35%. These traits make 904L forgings perfect for harsh and corrosive environments that demand durability and long-lasting performance.
| 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 | N | |
| 347 | min. | – | – | – | – | – | 17.0 | – | 9.0 | – |
| max. | 0.08 | 2.0 | 1.0 | 0.040 | 0.030 | 20.0 | 13.0 | – | ||
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 347 | 515 | 205 | 40 | 92 | 201 |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | – | 08Ch18N12B | – | X6CrNiNb18-10 |
Stainless Steel 347 forgings have limitations in extreme temperatures above 1600°F (870°C), susceptibility to stress corrosion cracking in chloride environments, and reduced formability compared to some other stainless steel grades.
The forging temperature range for Stainless Steel 347 is typically between 2100°F (1149°C) and 2200°F (1204°C). It ensures optimal grain structure and mechanical properties for high-performance applications.
Stainless Steel 347 forgings require minimal maintenance, primarily periodic cleaning to remove contaminants. Regular inspection for corrosion or wear is recommended, along with ensuring proper lubrication for moving parts in harsh environments.
Stainless Steel 904L Forgings find extensive use in industries where corrosion resistance and mechanical strength are crucial. They are frequently utilized in chemical processing plants, heat exchangers, marine equipment, and oil and gas refineries, thanks to their ability to endure acidic and chloride-rich conditions. Moreover, they are employed in pulp and paper mills, pharmaceutical processing equipment, and desalination plants. The alloy’s non-magnetic properties and excellent weldability make it ideal for precision components in aerospace and power generation. Sadiki Metals’ 904L forgings guarantee high reliability, durability, and safety in critical industrial applications.






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