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In industrial heat treatment, petrochemical reforming, and waste incineration processes, equipment must often endure cyclic heating to 1150°C in oxidizing or mildly carburizing atmospheres. Inconel 601 (UNS N06601 / W.Nr. 2.4851) is a solid-solution strengthened nickel-chromium-iron alloy distinguished by the addition of approximately 1.4% Aluminum (Al). This aluminum addition promotes the formation of a tenacious, adherent Al₂O₃ scale, giving Alloy 601 superior resistance to oxidation, scaling, and carburization at temperatures up to 1200°C (2192°F)—performance that standard Inconel 600 or 300-series stainless steels cannot match. Shanghai COCESS Special Alloys Co., Ltd supplies Inconel 601 plate, sheet, bar, seamless tube, and welded pipe in full compliance with ASTM B168, B166, and B167, with EN 10204 3.1 certification and global export support.
Chemical Composition & Metallurgical Feature
Unlike precipitation-hardenable alloys (e.g., Inconel 718), Inconel 601 is strengthened by solid-solution atoms (Cr, Fe) and the minor alloying of Al. The key differentiator from Inconel 600 is the 21–25% Cr + 1.0–1.7% Al combination, which enables selective oxidation of aluminum to form a protective α-Al₂O₃ film.
Typical Chemistry (wt%, per ASTM B168 / AMS 5870):
Nickel (Ni): 58.0 – 63.0 % (Balance / Matrix)
Chromium (Cr): 21.0 – 25.0 % (Typically 23.0%; forms Cr₂O₃ sub-layer)
Iron (Fe): 16.0 – 20.0 % (Austenite stabilizer / Cost reducer)
Aluminum (Al): 1.0 – 1.7 % (Typically 1.2–1.4%; KEY: promotes Al₂O₃ scale for oxidation/carburization resistance)
Carbon (C): ≤ 0.10 %
Manganese (Mn): ≤ 1.0 % (Usually ≤ 0.5%)
Silicon (Si): ≤ 0.50 %
Sulfur (S): ≤ 0.015 % (Premium grade ≤ 0.005%)
Copper (Cu): ≤ 1.0 %
Physical & Mechanical Properties (Solution Annealed Condition)
Inconel 601 is typically supplied in the solution-annealed condition (1065–1175°C rapid quench). It is non-magnetic in the annealed state and offers good ductility for cold forming (bending, spinning).
Physical Constants:
Density: 8.11 g/cm³ (0.293 lb/in³)
Melting Range: 1320 – 1370 °C (2410 – 2500 °F)
Thermal Conductivity (20°C): ~11.5 W/m·K
Coefficient of Thermal Expansion (20–1000°C): ~14.2 × 10⁻⁶ /K
Continuous Oxidation Resistance Limit: Up to 1150–1200°C (2100–2190°F) in static air.
Room Temperature Mechanical Properties (Minimum per ASTM B168):
Tensile Strength (Rm): ≥ 586 MPa (85 ksi); typical 650–760 MPa
Yield Strength (Rp0.2): ≥ 241 MPa (35 ksi); typical 290–345 MPa
Elongation (A5): ≥ 30 % (typical 35–45%)
Hardness: ≤ 95 HRB (approx. ≤ 200 HB)
Stock Availability & Product Range
We maintain warehouse inventory and production-ready capacity for:
|
Product Form |
Standard |
Typical Size Range |
Condition |
|---|---|---|---|
|
Plate / Sheet / Strip |
ASTM B168, AMS 5870 |
Plate: 3–50 mm; Sheet: 0.5–6 mm; Strip coil: 0.1–3 mm |
Solution Annealed, Pickled or Bright Annealed |
|
Round Bar / Forging Stock |
ASTM B166 |
Dia. 6–300 mm (black, peeled, ground) |
Solution Annealed |
|
Seamless Tube / Pipe |
ASTM B167, B516 |
OD 6–219 mm; WT 0.8–20 mm |
Bright Annealed or Pickled |
|
Welded Pipe |
ASTM B517 |
OD 21–1000 mm; WT 1.0–12 mm |
Longitudinal weld, solution + pickled |
|
Custom Forgings / Rings |
ASTM B166 (per dwg) |
Discs, blocks, rolled rings |
Rough machined or as-forged |
In-House Custom Machining & Processing
To reduce your inbound handling and scrap, Shanghai COCESS Special Alloys Co., Ltd provides:
Plate Processing: CNC water-jet or plasma cutting (tube sheet blanks, furnace liners, custom profiles), drilled hole patterns per drawing.
Cut-to-Length: Bar and tube saw cut with square ends, deburred; tube end beveling (30°, 37°, J-bevel) for weld prep.
Rough Machining: Turning / facing of forged discs, blanks, and rings to your pre-form dimensions.
Heat Treatment: In-house solution annealing (1065–1175°C / rapid quench) with full temperature-time chart.
Surface Treatment: Pickling and passivation per ASTM A380 to remove oxide scale and restore passive film.
NDE Options: UT on plate (ASTM A388), 100% Eddy Current Testing (ET) on tubes, MT/PT on forgings upon request.
Quality Assurance & Global Export Service
Mill Test Report: EN 10204 3.1 with every shipment (heat analysis, mechanical test results, heat treat record). EN 10204 3.2 and third-party inspection (SGS / TÜV / DNV / BV) available.
Dimensional Inspection: Verified per order specification; certificate of conformity issued.
Export Packaging: Seaworthy wooden crates with VCI interleaving for plates/sheets; steel-bound bundles with end caps for bars/tubes; coil eye-to-sky or eye-to-wall as required.
Documentation Support: Commercial Invoice, Packing List, Certificate of Origin (CO / Form A / EUR.1), and any project-specific MTR appendices.
Typical Applications of Inconel 601
Heat Treatment Furnaces: Radiant tubes, muffles (retorts), hearth rolls, conveyor belts, annealing covers, fixturing & baskets.
Petrochemical / Reformer: Catalyst tube hangers, reformer furnace tube supports, pyrolysis tube shields.
Incineration & Power Gen: Grate bars, burner nozzles, ducting, soot blower elements in flue gas containing SO₂/Cl⁻.
Instrumentation: High-temp thermocouple protection sheaths (to 1100°C in oxidizing atmosphere).
Aero/Gas Turbine (secondary zones): Combustor liner sections, flame holders where high-temp oxidation resistance is required but stress is moderate.
For Inconel 601 (UNS N06601) stock checks, mill test report samples, custom processing quotes, or formal RFQ response, please contact Shanghai COCESS Special Alloys Co., Ltd. Our technical and logistics team is ready to support your furnace, refinery, and incineration project requirements with reliable material and documented quality.
Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com
