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INCOLOY 718（UNSN07718） Sheet/Plate
High-Strength Nickel-Chromium Alloy for Cryogenic to 704°C Applications
INCOLOY 718 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 INCOLOY 718 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 |
INCOLOY 718 | 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) | ≥ ≥ 1275 MPa |
Yield Strength (Rp0.2) | ≥ ≥ 1034 MPa |
Elongation | ≥ ≥ 12 % |
Hardness | ≤ 331 HB |
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 | 2.4668 |
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
• Age Hardened
• Gas turbine discs, compressor blades and rotor shafts
• Aerospace engine components and rocket motors
• Cryogenic storage tanks and space vehicle structures
• High-strength fasteners and springs for high-pressure service
• Downhole oil and gas tools and wellhead components
• Nuclear reactor cores, pumps, and valves
• Chemical process equipment requiring high strength and corrosion resistance
INCOLOY 718 can be fabricated and welded using standard nickel-alloy practices.
Common welding methods include:
• GTAW (TIG)
• GMAW (MIG)
• SMAW
Matching filler metals such as ERNiFeCr-2 (Alloy 718) 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 (INCOLOY 718)
• Diameter × Length
• Quantity
• Surface finish / delivery condition
• Application environment
Our technical team will respond with datasheets, pricing, and delivery schedule promptly.
