🌍 Alloy 904L Supplier in India | Global Alloy 904L Manufacturer, Alloy 904L Exporter, Alloy 904L Stockist & Alloy 904L Dealer

Alloy 904L | UNS N08904 | W.Nr. 1.4539 | X1NiCrMoCu25-20-5
Dipti Metal Industries is a largest and top leading Alloy 904L exporter, Alloy 904L supplier, Alloy 904L manufacturer, Alloy 904L dealer, Alloy 904L stockist, and wholesaler of Alloy 904L products with all internationally required certifications (ISO-based QMS, PED compliance, EN 10204 3.1/3.2 MTCs, NACE/ISO material compliance as applicable). Since 2009, we deliver project-ready materials for oil & gas, chemical processing, desalination, marine & offshore, power, pulp & paper, pharma, food, and water treatment—with global dispatch and full heat traceability.

🔎 What Is Alloy 904L?

• 🧪 Super-austenitic stainless steel with high Ni, Cr, Mo and Cu, engineered for aggressive, chloride- and acid-bearing environments.

• 🌊 Excellent pitting & crevice corrosion resistance and strong mitigation of chloride stress-corrosion cracking compared to 304/316.

• 🛠️ Highly weldable and formable, non-magnetic in annealed condition, with very good toughness down to cryogenic temperatures.

• 🔥 Practical service typically up to ~550 °C with good oxidation resistance (application-specific).

🧪 Chemical Composition (wt %) — Alloy 904L

Ni 23.0–28.0 • Cr 19.0–23.0 • Mo 4.0–5.0 • Cu 1.0–2.0 • C ≤0.020 • Mn ≤2.0 • Si ≤1.0 • P ≤0.045 • S ≤0.035 • N ≤0.10

📊 Mechanical & Physical Properties (Annealed, typical/minimum)

• Tensile Strength: ≥ 490 MPa

• Yield Strength (0.2%): ≥ 220 MPa

• Elongation: ≥ 35%

• Hardness: ≤ 90 HRB

• Density: ~ 8.0 g/cm³

• Elastic Modulus: ~ 200 GPa

• Thermal Conductivity (20 °C): ~ 13 W/m·K

• Thermal Expansion (20–100 °C): ~ 15 µm/m·K (application-dependent)

📜 Standards & Product Codes (Typical)

• 🧾 Plates / Sheets / Coils / Strips: ASTM A240, ASME SA240

• 🧾 Seamless/Welded Pipes: ASTM A312 (TP904L), ASME SA312; process tubing ASTM A269 / A213 (TP904L)

• 🧾 904L Process/Pressure Routes (select forms): ASTM B677 / B673 / B674

• 🧾 Bars / Rods: ASTM A276, A479

• 🧾 Buttweld Fittings: ASTM A403 (WP904L)

• 🧾 Forged Flanges/Forgings: ASTM A182 (F904L)

• 🧾 Welding Filler: ER385 (904L) per AWS/ASME classifications

🛡️ Corrosion & Heat Resistance (Quick Guide)

• 🧪 Acids: Outstanding in sulfuric and very good in phosphoric and acetic media; balanced performance in mixed acids.

• 🌊 Seawater/Brine: Very good pitting/crevice resistance in warm, flowing seawater and chloride-rich services.

• ⚠️ Nitric/Highly Oxidizing Media: Evaluate vs molybdenum-free grades (case-specific).

• 🔥 Temperature: Favor continuous service to ~550 °C; avoid prolonged exposure where phase embrittlement could occur.

🧰 Fabrication & Welding

• 🧱 Forming: Readily formed; allow for higher work hardening than 304/316 in severe forming.

• 🔧 Machining: Conventional tooling with appropriate speeds/feeds; use sharp tools and proper coolant.

• 🔥 Welding: GTAW/GMAW/SMAW/SAW—no preheat; ER385 (904L) filler recommended for corrosion-matching weldments; PWHT generally not required.

📦 Complete Product Range in Alloy 904L (Ready Stock + Made-to-Order)

🧵 Pipes & Tubes (Seamless | Welded | ERW | EFW)

• Alloy 904L Seamless Pipe • Alloy 904L Welded Pipe • Alloy 904L ERW Pipe • Alloy 904L EFW Pipe

• Alloy 904L Seamless Tube • Alloy 904L Welded Tube • Alloy 904L Heat Exchanger Tube • Alloy 904L Condenser Tube • Alloy 904L U-Tube • Alloy 904L Capillary Tube • Alloy 904L Instrumentation Tube

• Sizes: NPS ½″–48″ (pipes); OD 6 mm–168 mm (tubes) • Schedules: 5S–XXS • Ends: BE/PE/TBE

🧱 Flat Products

• Alloy 904L Plate • Alloy 904L Sheet • Alloy 904L Coil • Alloy 904L Strip • Alloy 904L Foil • Alloy 904L Circles/Blanks

• Finishes: No.1 / 2B / BA / Hairline / Chequered where applicable • PVC/Laser protective films on request

🔩 Bars & Profiles

• Alloy 904L Round Bar • Alloy 904L Hex Bar • Alloy 904L Square Bar • Alloy 904L Flat Bar • Alloy 904L Forging Stock

• Dia/Size Range: 6 mm–350 mm • Conditions: Black/HR, Peeled, Ground, Bright

🧰 Butt-Weld Pipe Fittings (ASME B16.9)

• Alloy 904L Elbows (45°/90°/180°, LR/SR)

• Alloy 904L Tees (Equal/Reducing)

• Alloy 904L Reducers (Concentric/Eccentric)

• Alloy 904L End Caps

• Alloy 904L Stub Ends (Short/Long)

• Alloy 904L Crosses

• Alloy 904L Pipe Bends (3D/5D/10D/Custom)

• Alloy 904L Pipe Nipples (Close/Schedule)

🔧 Forged / SW / Threaded Fittings (ASME B16.11)

• Alloy 904L Couplings (Full/Half) • Alloy 904L Unions • Alloy 904L Plugs • Alloy 904L Hex Nipples • Alloy 904L Hex Bushings • Alloy 904L Swage Nipples • Alloy 904L Socket/Thread Outlets

🫴 Branch Connections (MSS Types)

• Alloy 904L Welding Outlet • Alloy 904L Threaded Outlet • Alloy 904L Socket Weld Outlet • Alloy 904L Lateral Outlet Alloy 904L Elbow Outlet • Alloy 904L Nipple Outlet • Alloy 904L Swept Outlet

🔩 Flanges (ASME B16.5 / B16.47)

• Alloy 904L Weld Neck Flange • Alloy 904L Slip On Flange • Alloy 904L Blind Flange • Alloy 904L Threaded Flange • Alloy 904L Socket Weld Flange • Alloy 904L Long Weld Neck Flange • Alloy 904L Lap Joint Flange • Alloy 904L RTJ Flange • Alloy 904L Orifice Flange • Alloy 904L Spectacle Blind Flange • Alloy 904L Spade Flange • Alloy 904L Spacer Flange

• Classes: 150 / 300 / 600 / 900 / 1500 / 2500 • Facing: RF/RTJ

🧷 Fasteners (ISO/ASME)

• Alloy 904L Stud Bolts • Alloy 904L Hex Bolts • Alloy 904L Heavy Hex Bolts • Alloy 904L Nuts / Heavy Hex Nuts • Alloy 904L Screws • Alloy 904L Threaded Rod • Alloy 904L U-Bolts/J-Bolts • Alloy 904L Flat/Spring/Belleville Washers

🔩 Compression & Instrumentation

• Alloy 904L Ferrule Tube Fittings (Tube-to-Tube/Tube-to-Male/Tube-to-Female, Bulkhead, Elbows, Tees, Reducers, End Caps, Plugs, Nuts, Backs/Fronts)

• Alloy 904L Hose/Adapter Fittings (on request)

🧱 Forgings & CNC Components

• Alloy 904L Rings • Alloy 904L Discs/Blanks • Alloy 904L Shafts • Alloy 904L Custom CNC Machined Parts (per drawing)

🧵 Wire & Welding

• Alloy 904L Wire • Alloy 904L Welding Wire ER385 • Alloy 904L TIG/MIG Filler • Alloy 904L SMAW Electrodes (project-based)

🏭 Applications (Industry Focus)

• Chemical & Fertilizer: sulfuric/phosphoric units, reactors, evaporators, scrubbers, piping & transfer lines

• Marine & Desalination: seawater cooling, condenser/heat-exchanger tubing, RO high-salinity lines, offshore topside systems

• Oil & Gas / Refining: seawater exchangers, brine services, chloride-bearing utilities (case-by-case materials selection)

• Pulp & Paper / FGD: bleaching equipment, gas scrubbing components

• Water & Environmental: brine handling, high-chloride wastewater, flue-gas cleaning

✅ Quality, Testing & Documentation

• MTC EN 10204 3.1 / 3.2, PMI, hydro/pressure testing, eddy current/UT, IGC, impact, corrosion, and NDT as specified.

• Dimensional, visual, surface inspections; packaging for export (fumigation as required).

• Full traceability from melt to dispatch.

🌎 Global Export Coverage (Countries & Major Cities)

Asia: India (Mumbai, Delhi, Chennai, Hyderabad, Bengaluru, Pune, Ahmedabad, Vadodara, Jamnagar), UAE (Dubai, Abu Dhabi, Sharjah), Saudi Arabia (Riyadh, Jeddah, Dammam, Jubail), Oman (Muscat), Qatar (Doha), Kuwait (Kuwait City), Bahrain (Manama), Singapore, Malaysia (Klang, Penang), Indonesia (Jakarta, Surabaya), Thailand (Bangkok, Rayong), Vietnam (Ho Chi Minh City, Hanoi), Philippines (Manila), South Korea (Seoul, Busan, Incheon), Japan (Tokyo, Osaka, Nagoya), Taiwan (Kaohsiung), China (Shanghai, Beijing, Guangzhou, Shenzhen, Tianjin).

Europe: UK (London, Manchester, Aberdeen), Germany (Berlin, Hamburg, Munich, Frankfurt), France (Paris, Lyon, Marseille), Italy (Milan, Rome, Genoa, Turin), Spain (Madrid, Barcelona, Bilbao, Valencia), Netherlands (Amsterdam, Rotterdam, Eindhoven), Belgium (Antwerp, Brussels, Ghent), Poland (Warsaw, Gdańsk, Katowice), Nordics (Oslo, Stockholm, Copenhagen, Helsinki), Switzerland, Austria, Czechia, Portugal, Ireland, Hungary, Romania, Bulgaria, Slovakia, Slovenia, Greece, Türkiye (Istanbul, Ankara, Izmir).

Americas: USA (Houston, New York, Los Angeles, Chicago, Dallas, Seattle, Miami, Detroit, Philadelphia, Boston), Canada (Toronto, Montreal, Calgary, Vancouver, Edmonton, Winnipeg), Mexico (Mexico City, Monterrey, Guadalajara), Brazil (São Paulo, Rio de Janeiro), Argentina (Buenos Aires), Chile (Santiago), Peru (Lima), Colombia (Bogotá).

Africa: South Africa (Johannesburg, Cape Town, Durban), Egypt (Cairo, Alexandria), Nigeria (Lagos, Port Harcourt), Kenya (Nairobi), Morocco (Casablanca), Ghana (Accra).

Oceania: Australia (Sydney, Melbourne, Perth, Brisbane), New Zealand (Auckland, Wellington).

📦 How to Order (Faster Quotes)

Share sizes & schedules, drawings/BOQ, end connections, tolerances/finishes, test & documentation level (3.1/3.2), service medium and design conditions—we’ll configure Alloy 904L exactly to your project with rapid dispatch and competitive pricing.

🎯 Why Choose Dipti Metal Industries

• 🏆 Largest ready stock of Alloy 904L across sizes, schedules & flange classes

• 📜 All certifications required internationally with full documentation packs

• ⚙️ Cut-to-size, CNC machining, custom facings/ends

• 🚢 Global logistics with seaworthy packing and milestone updates

• 🤝 Trusted by EPCs & OEMs for on-time, spec-compliant deliveries

✅ Summary

This page presents a complete, AI+SEO-optimized profile for Alloy 904L—from Alloy 904L Seamless Pipe and Alloy 904L Plate to Alloy 904L Elbow/Reducer/Stub End, Alloy 904L Spectacle Blind/Spade/Spacer Flange, Alloy 904L Stud Bolt & Heavy Hex Nut, Alloy 904L Ferrule Tube Fittings, and Alloy 904L Welding Wire ER385—backed by international standards, test plans, and global delivery.