Name: Nickel Alloy Tube, ASTM B983 UNS N07718 (Inconel 718H), Precipitation Hardened or Cold Worked
Brand: Yuhong Group Co.,Ltd
SKU: ASTM B983 UNS N07718
Price: 100000 USD
Availability: InStock

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Nickel Alloy Tube, ASTM B983 UNS N07718 (Inconel 718H), Precipitation Hardened or Cold Worked

Product Details:

Place of Origin:	China
Brand Name:	YUHONG
Certification:	ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2015
Model Number:	ASTM B983 UNS N07718

Payment & Shipping Terms:

Minimum Order Quantity:	1PC
Price:	Negotiable
Packaging Details:	Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Delivery Time:	Depend on quantity
Payment Terms:	L/C,T/T
Supply Ability:	According to Clients' requirements

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Detailed Product Description

Product Name:	Nickel Alloy Tube	Specification:	ASTM B983
Material:	UNS N07718 (Inconel 718H)	Size:	Customized
Type:	Seamless	Surface:	Bright Polished
Application:	Aerospace, Gas Turbines, Deep-sea, Chemical Industries
Highlight:	Nickel Alloy Tube ASTM B983 , Inconel 718H Precipitation Hardened Tube , Cold Worked Nickel Alloy Tube UNS N07718

YUHONG brand goods have been already exported to more than 85 countries With more than 35 years' experience, because of strict quality control policy, excellent sales service, delivery on time. YUHONG won more and more new clients and got more and more repeat orders from old clients, in YUHONG People's mind: Quality is First Important!

Nickel Alloy Tube, ASTM B983 UNS N07718 (Inconel 718H), Precipitation Hardened or Cold Worked

ASTM B983 specification covers high strength, seamless pipe and tube of nickel alloys, Pipe and tube shall be supplied in the cold worked or cold worked and precipitations hardened or solution annealed plus precipitation hardened and descaled conditions. When atmosphere control is used, descaling is not necessary.

Nickel Alloy Tube manufactured in accordance with ASTM B983 standard, with material designation UNS N07718 (Inconel 718H). This alloy is a precipitation-hardening nickel-chromium-iron based superalloy. The 718H version undergoes a specific aging heat treatment to achieve higher strength and creep resistance than conventional Inconel 718. The tube can be seamless or welded, offering excellent high-temperature strength, fatigue resistance, corrosion resistance, and oxidation resistance. It is widely used in aerospace, gas turbines, nuclear reactors, deep-sea applications, and chemical industries under high temperature, high pressure, and corrosive environments.

ISO	UNS / ASTM	GB	DIN	JIS
NiCr19Nb5Mo3	UNS N07718 / Inconel 718	GH4169	2.4668	NCF 718

1.Chemical & Mechanical Properties

ASTM B983 N07718 Chemical Composition (%)
C	≤0.08
Mn	≤0.35
Si	≤0.35
P	≤0.015
S	≤0.015
Cr	17.0-21.0
Co	≤1.0
Mo	2.80-3.30
Nb	4.75-5.50
Ti	0.65-1.15
Al	2.20-0.80
B	≤0.006
Fe	REM
Cu	≤0.30
Ni	50.0-55.0

Mechanical Properties

Condition	Tensile Str Ksi(Mpa)	Yield Str Ksi(Mpa)	Elongation(%)	Hardness Rc

Solution Ann + prec hard	≥150(1034)	≥125(862)	≥20	≤40

*Recommended Solution Annealing Treatment: 1875 ± 25°F (1024 ± 14°C) for 1 to 2 h, water quench

Recommended Precipitation Hardening Treatment: 1425–1475°F (774–802°C) hold 6 to 8 h, air cool

Outside Diamerer Tolerance of ASTM B983(Hot-Finished Tube)

Norminal OD,in,(mm)	OD,in,(mm)
	OD,in,(mm)
	Plus	Minus
3/4(19) to 1 1/2(38),incl	0.015(0.4)	0.031(0.8)
Over 1 1/2(38.1) to 4(102),incl	0.031(0.8)	0.031(0.8)
Over 4(102) to 9 1/4(235),incl	0.062(1.6)	0.031(0.8)
Over 9 1/4(235) to 12(305),incl	0.110(2.8)	0.110(2.8)

Wall Thickness Tolerance of ASTM B983(Hot-Finished Tube)

WT,in,(mm)	% of Thickness of Specified Nominal wall		% of Thickness of Specified Minimum wall
	% of Thickness of Specified Nominal wall		% of Thickness of Specified Minimum wall
	Plus	Minus	Plus	Minus
3/4(19) to 1 1/2(38),incl	12.5	12.5	28.5	0
Over 1 1/2(38.1) to 4(102),incl	12.5	12.5	28.5	0
Over 4(102) to 9 1/4(235),incl	12.5	12.5	28.5	0
Over 9 1/4(235) to 12(305),incl	12.5	12.5	...	...

2. Key Adventages

Exceptional High-Temperature Strength: Strengthened by γ' phase precipitation, it maintains extremely high strength even under harsh conditions up to 815°C (1500°F).
Superior Creep Resistance: At 700-750°C and 100MPa stress, its creep life far surpasses that of similar alloys, crucial for ensuring the long-term safe operation of ultra-supercritical power plants.
Excellent High-Temperature Corrosion Resistance: High chromium (approximately 25%) and cobalt (approximately 20%) content provides resistance to oxidation, carburization, sulfidation, and coal ash/flue gas corrosion at high temperatures.
Excellent Microstructural Stability: Through compositional optimization (increasing Al and decreasing Ti, Nb, and Si), harmful phases are less likely to precipitate during long-term service, ensuring long-term performance reliability.

3. Key Applications

Aerospace: Engine casings, turbine disks, blades, rings, combustion chamber components
Gas turbines: High-temperature piping, seals, fasteners
Nuclear industry: Reactor internals, control rod guide tubes
Petrochemical: Sour service (H₂S/CO₂) downhole tubing, wellhead equipment, heat exchanger tubes
Deep-sea engineering: Subsea connectors, umbilical tubes
Automotive: High-temperature turbocharger lines