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INCONEL 660（UNSS66286） Sheet/Plate
Iron-Nickel-Chromium Precipitation-Hardenable Alloy for High Temperature Strength
INCONEL 660 sheet and plate are widely used for corrosion-resistant vessels, heat exchangers, columns, and fabricated equipment in chemical processing and pollution-control services. With high chromium content, the alloy provides enhanced resistance to oxidizing media while maintaining excellent performance in reducing environments, plus outstanding resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.
As a professional Chinese nickel-based alloy manufacturer, we supply INCONEL 660 in multiple product forms with stable chemistry, consistent mechanical properties, and flexible dimensional customization for global industrial users.
Typical supply range (custom sizes and tolerances available upon request):
Item | Range / Options | Notes |
Thickness | 0.5 – 50 mm | Sheet typically ≤ 6 mm; plate typically ≥ 6 mm (project-defined). |
Width | Up to 2000 mm | Slitting service available; define tolerance if critical. |
Length | Up to 6000 mm | Cut-to-length (shearing) by agreement; define tolerance if critical. |
Surface finish | 2B / No.1 / BA / Polished | PVC protective film optional for surface-critical parts. |
Edge | Mill edge / Slit edge | Deburring / edge conditioning available. |
Flatness / tolerance | Per ASTM/EN or as agreed | Define flatness for heat-exchanger plates and welded assemblies. |
Delivery condition | Solution annealed (standard) | Annealed & pickled/bright depending on thickness/finish. |
Dimension definition: THK × WIDTH × LENGTH.
• Excellent resistance to pitting and crevice corrosion in chloride media
• Outstanding resistance to chloride stress corrosion cracking (SCC)
• Strong resistance to oxidizing and reducing acids in mixed process media
• Withstands wet chlorine gas, hypochlorite, and chlorine dioxide solutions
• High chromium content improves resistance to oxidizing media; suitable for use in the as-welded condition
• Good fabrication and welding performance for CPI equipment
Element | Ni | Cr | Mo | Fe | W | Mn | Si | C |
INCONEL 660 | Balance | 20.0–22.5 | 12.5–14.5 | 2.0–6.0 | 2.5–3.5 | ≤0.50 | ≤0.08 | ≤0.015 |
Extremely low carbon and silicon help maintain corrosion resistance in as-welded structures.
Property | Value |
Tensile Strength (Rm) | ≥ ≥ 930 MPa |
Yield Strength (Rp0.2) | ≥ ≥ 635 MPa |
Elongation | ≥ ≥ 12 % |
Hardness | ≤ 93 HRB |
Mechanical properties may vary slightly with product form and heat treatment condition.
Standard System | Specification |
ASTM / ASME | ASTM B575 / ASME SB-575 |
EN | EN 10204 |
UNS | N06022 |
DIN | 1.4980 |
JIS | NW 6022 |
Item | Range |
Thickness | 0.5 – 50 mm |
Width | Up to 2000 mm |
Length | Up to 6000 mm |
Surface Finish | 2B / No.1 / BA / Polished |
Edge | Mill edge / Slit edge |
Custom sizes, tight tolerances, and cut-to-length service are available upon request.
• Solution Annealed & Aged
• Turbine blades, discs and fasteners operating up to 700°C
• Jet engine components and exhaust systems
• High-temperature springs, bolts and shafts
• Gas turbines and steam turbine components
• Fasteners for high temperature service in automotive and marine engines
• Heat-resistant components in chemical and petrochemical plants
• Cryogenic structural applications requiring good strength and toughness
INCONEL 660 can be fabricated and welded using standard nickel-alloy practices.
Common welding methods include:
• GTAW (TIG)
• GMAW (MIG)
• SMAW
Matching filler metals such as ERNiCrMo-3 are typically recommended.
• EN 10204 3.1 Material Test Certificate
• Chemical composition analysis
• Mechanical testing (tensile, hardness)
• PMI / XRF testing available
• Dimensional inspection
• Third-party inspection on request (BV, SGS, TUV, DNV)
• PVC protective film on surface (where applicable)
• Wooden pallets or export-grade crates
• Seaworthy packaging for long-distance shipment
• Global delivery by sea, air, or multimodal transport
• Professional nickel-based alloy manufacturer in China
• Stable raw material sourcing and melting control
• Wide stock and fast production cycle
• Competitive pricing for global projects
• Experience with international EPC, OEM, and distributors
For quotation or technical consultation, please provide:
• Required grade (INCONEL 660)
• Diameter × Length
• Quantity
• Surface finish / delivery condition
• Application environment
Our technical team will respond with datasheets, pricing, and delivery schedule promptly.
