Stainless steel round bar 904L black finish UNS N08904
904L is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to chloride attack - both pitting / crevice corrosion and stress corrosion cracking.
904L is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures.
904L does have very substantial contents of the high cost ingredients nickel and molybdenum. Many of the applications in which this grade has previously performed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S31803 or S32205), so it is used less commonly than in the past.
Key Properties
These properties are specified for flat rolled product (plate, sheet and coil) in ASTM B625. Similar but not necessarily identical properties are specified for other products such as pipe, tube and bar in their respective specifications
Applications of 904L Stainless steel round bar
Typical applications of 904L Stainless steel round bar include:
• Processing plant for sulphuric, phosphoric and acetic acids
• Pulp and paper processing
• Components in gas scrubbing plants
• Seawater cooling equipment
• Oil refinery components
• Wires in electrostatic precipitators
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A-one Alloy’s product scope covers but not limit to the grades below:
Anti-corrosion alloy
Hastelloy C276, Hastelloy C22, Hastelloy B2/B3, Hastelloy G30, Hastelloy C2000, Hastelloy X, Inconel 600, Inconel 601, Inconel 602 CA, Inconel 625, Inconel X-750, Inconel 690, Inconel 686, Inconel 718, Alloy 20, Alloy 28, Alloy 31, Monel 400, Monel K500,
Superalloy (high temperature alloy)
Incoloy 800, Incoloy 800H/HT, Incoloy 825, Incoloy901, Incoloy 925, L605 (Haynes 25), Waspaloy, MP35N, Nimonic 80A, Nimonic 90,
Precision alloy
Soft magnetic alloy:HiperCo27, FeCo27, Mumetal, HiperCo50, Permendur, Permalloy, Mumetal, 45-Permalloy, 65-Permalloy, Hy-Ra49, ThermoPerm, PC, PB, PE, 12Alfenlo, Supermendur
Permanent magnetic alloy: P6, Vicalloy, Comolloy
Elastic alloy:Phynox, Elgiloy, Ni-Span-C 902, EL-3, EL-4, Elcolloy, Diaflex, Nivaflex, K·R·N, Incoloy 903
Expansion alloy:Kovar,Invar,Super-Invar, Nilo36, Nilo42, Nilo K, Vacon 12, Ceramvar, Vacon20, KV-1, KV-2, KV-3, KV-4,
Special stainless steel
254SMO (F44, S31254), 253MA, S32205 (SAF 2205), S32750 (SAF 2507), S32760 (Zeron 100), S32906 (SAF 2906), S32707 (SAF 2707 HD), 17-4PH (630), 17-7PH (631), 15-7Mo (632), 15-5PH (XN-12), Custom 455, Nitronic 50, Nitronic 60, 724LN (310MoLn), 725LN (316Lmod), AL-6XN, 1.4592, 316LVM, 654SMO, A286, Maraging 300/350
Magnetostrictive material
Terfenol-D (TbDyFe, GMM), FeGa alloy, Magnetostrictive waveguide wire
