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Inconel 718（UNS N07718）Ni-Cr-Fe-Mo-Nb High-temperature Alloy

Inconel 718 is a nickel-chromium-iron-molybdenum-niobium precipitation-strengthened high-temperature alloy. It achieves extremely high strength through aging heat treatment and exhibits excellent comprehensive performance in the range of -253℃ to 704℃. It combines high strength, high toughness, good corrosion resistance, and creep resistance, making it one of the most widely used high-temperature alloys in aerospace, gas turbines, oil drilling, and high-end machinery.

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Name	High-temperature resistant alloy
Thickness	Common thickness	0.5–6 mm (for stamping, bending, household appliances / automotive parts)
	Medium-thick specification	6–20 mm (for steel structures, mechanical bases)
	Thick specification	20–100 mm (for heavy-duty frames, pressure vessels)
Tolerance	±0.02–±0.10 mm (varies with thickness)
Width	1000、1219、1250、1500、1800、2000
Length	plate/sheet:2000、2500、3000、6000、12000mm	Coil:Single roll weight: 8 to 25 tons
Material Standards	AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, SAE, etc.
Delivery Condition	AR / As Rolled ，TMCP / Thermo-Mechanical Controlled Process ，N / Normalized，NR / Normalized Rolled ，CR / Controlled Rolling
Surface treatment	Pickling and passivation, sandblasting, polishing (including mechanical polishing and chemical polishing, achieving a surface finish of Ra≤0.8μm), annealing.
Delivery status	Solution-treated and aged (ST) state, cold-rolled/hot-rolled state
Delivery Time	within 5-10 days(Special specifications will take 15 to 20 days)

Inconel 718 is a Ni-Cr-Fe-Mo-Nb precipitation-strengthened superalloy. It achieves extremely high strength through aging heat treatment and exhibits excellent comprehensive performance within the temperature range of -253℃ to 704℃. It combines high strength, high toughness, good corrosion resistance, and creep resistance, making it one of the most widely used superalloys in aerospace, gas turbines, oil drilling, and high-end machinery.

Common Applications:

Aerospace: Aero-engine turbine disks, blades, combustion chambers, casings, fasteners, rocket engine structural components

Oil & Gas: Deep well drilling tools, downhole safety valves, Christmas trees, acidic oil and gas field equipment, NACE (Non-Aero-Environmental-Environmental) components

Energy & Power: Gas turbine components, steam turbine blades, nuclear reactor structural components

High-End Machinery: High-speed shafts, high-temperature bearings, corrosion-resistant high-strength fasteners, mold inserts

Chemical Equipment: High-temperature and high-pressure reactors, corrosion-resistant pressure vessels, special-condition pipelines

Corresponding brand

United States UNS/ASTM	China GB	Germany W.Nr./DIN	United Kingdom BS	France AFNOR	Japan JIS
N07718	GH4169	2.4668	NA51	NC19FeNb	NCF 718
Inconel 718	(GH718)	NiCr19Fe19Nb5Mo3	NA51	NC19FeNb	NCF 718

Chemical composition (mass fraction, %)

Element

Nb+Ta

Content

50~55

17~21

Margin

4.75~5.50

2.80~3.30

0.65~1.15

0.20~0.80

≤0.08

≤0.35

≤0.015

≤0.006

Mechanical properties (inspection standards)

State	Tensile strength (MPa)	Yield strength (MPa)	Elongation (%)	Hardness (HRC)
Solution treatment + Aging	≥1100	≥965	≥12	38-48

Advantages:

Extremely high strength: After aging, its strength is among the highest of commonly used high-temperature alloys.

Wide temperature range: Excellent low-temperature toughness, and outstanding high-temperature creep and fatigue resistance.

Good corrosion resistance: Resistant to oxidation, acids, alkalis, and chloride ion corrosion, suitable for marine and oil and gas environments.

Stable microstructure: Stable performance during long-term high-temperature service, not prone to embrittlement.

Good weldability: Weldability is superior to many high-strength high-temperature alloys.

Disadvantages:

Requires heat treatment: Requires solution treatment and aging to achieve high strength, a complex process.

Difficult to process: High hardness, severe work hardening, difficult to cut.

Limited upper temperature limit: Long-term use should not exceed 704℃; above this temperature, strength decreases significantly. High cost: Raw materials are expensive, and processing costs are far higher than those of ordinary alloys and stainless steel.

Hot Selling Products/Standards:

Bar stock/Forgings: ASTM B637, AMS 5662/5663/5664

Plate stock: ASTM B670, AMS 5596

Seamless tube: ASTM B637, AMS 5589

Fasteners: AMS 5643, NAS 670

Documentation and Certification

Material Certificate: Mill Test Certificate (MTC), conforming to GB/ASTM/EN standards

Test Report: Chemical composition, mechanical properties, non-destructive testing (UT/MT/PT)

Packaging and Transportation

Rust Prevention: Passivation / Pickling / Rust-preventive oil + moisture-proof paper

Crater: Solid wood pallet / iron box, moisture-proof, impact-resistant

Transportation: Suitable for sea/air freight, marked with moisture-proof, shock-proof, high-end alloy

Payment Methods

Flexible payment terms available: T/T and L/C. For new clients, 30% advance payment for production, balance against copy of B/L. L/C is acceptable for large & regular orders to secure both parties.

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Next:Inconel 625 (UNS N06625) Ni-Cr-Mo-Nb High-Temperature Corrosion-Resistant Alloy

Warehousing Management

Before each batch of steel leaves the factory, a complete process inspection is strictly carried out. From chemical composition, mechanical properties to dimensional tolerance and surface quality, each item is carefully checked to ensure compliance with national standards and export regulations. At the same time, the quantity, packaging and rust prevention treatment are also verified. An original factory warranty certificate is attached, guaranteeing the quality. Before shipment, inspection photos are provided. Any non-compliant items will not be released, and the quality is fully controllable throughout the process. This ensures your overseas purchasing is safe and worry-free.

All items are visually inspected before delivery. No cracks, deformation, rust, scratches or cutting marks are allowed; edges must be smooth. Only visually sound products will be shipped.

Thickness, width, length, wall thickness, outer diameter have been measured. Straightness, curvature, torsion, diagonal tolerance all meet the corresponding tolerance requirements.

Quality inspection includes: mechanical property tests (yield strength, tensile strength), elongation rate, impact energy, hardness testing, chemical composition testing, process performance testing, etc.

Inspection according to packaging requirements: secure binding, moisture-proof film, rust-proof paper, export fumigation/fumigation-free wooden crates, shipping marks, gross weight, net weight, etc.

We will provide full reception services to support the customers' on-site inspection of the goods.

Hot Rolling Production Line

Cold rolling precision processing

Cold drawing/cold rolling line

Hot Rolling Production Line

Hot rolling production line (producing hot-rolled coils/medium-thick plates, thickness 2–60mm)

Cold rolling precision processing

(Producing ultra-thin / high-precision / shiny panels, with thickness ranging from 0.1 to 3mm, for high-end products)
Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Cold drawing/cold rolling line

(High-precision cold-drawn round steel, square steel, hexagonal steel, and special-shaped bars)

Warehousing Management

A ten-thousand-ton standardized warehouse with grid-based zoning and system positioning enables rapid material retrieval and reduces the time spent searching for materials.

Inbound inspection: Verify the physical items against the inbound form, inspect the appearance, dimensions, and labels. Once confirmed to be correct, the materials are entered into the ERP system and processed for storage.

Logistics and Global Delivery: Self-operated fleet + contracted logistics partners; expedited service available for urgent orders.

International Shipping: Supports FOB, CIF, DDP, and other trade terms, covering 100+ countries and regions.

Process: Booking → Trucking → Customs Declaration → Loading onto Ship/Aircraft → Bill of Lading Issuance → Document Delivery → Destination Port Customs Clearance (Optional) → Last-Mile Delivery.

Provides door-to-door one-stop logistics with full tracking to ensure safe and timely arrival of goods.

After-Sales Service and Traceability: Delivery receipts, logistics information, and quality inspection documents are sent to customers within 24 hours of shipment.

Established a full product lifecycle traceability system, allowing tracking of production, quality inspection, warehousing, and transportation records.

Follow-up inspection within 72 hours of arrival; rapid response and handling of quality issues; assistance in resolving customs clearance issues for foreign trade orders.

Packaging Method