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ASTM B163 UNS N08825 Nickel Alloy Steel Heat Exchanger Tube Incoloy Alloy 825 Seamless Tube

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ASTM B163 UNS N08825 Nickel Alloy Steel Heat Exchanger Tube Incoloy Alloy 825 Seamless Tube

Brand Name:	YUHONG
Model Number:	ASTM B163 UNS N08825 Nickel Alloy Seamless Tube
MOQ:	500kgs
Price:	NEGOTIABLE
Packaging Details:	Ply-wooden Case / Bundle with plastic Cap
Payment Terms:	L/C,T/T

Detail Information

Product Description

Detail Information

Place of Origin:

CHINA

Certification:

ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008

Production Name:

Nickel Alloy Tube

Standard:

ASTM B163, ASME SB163

Material:

Incoloy/Alloy 825, UNS N08825, 2.4858

OD:

1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", Etc.

WT:

BWG 25, 22, 20, 18 ... 10

Length:

Single Random, Double Random & Cut Length

Tube End:

Plain End, Beveled End

Process:

Cold Drawn

Application:

Boiler, Heat Exchanger, Oil And Gas Plant, Cooling, Condenser

Highlight:

ASTM B163 UNS N08825 Nickel Alloy Steel Tube, Alloy 825 Seamless Heat Exchanger Tube

Product Description

ASTM B163 / ASME SB163 UNS N08825 Alloy 825 Seamless Nickel Alloy Tube for Heat Exchanger

As a professional manufacturer and supplier in China, Yuhong Group has always adhered to a quality-first philosophy, providing customers with high-quality products and good service. In recent years, Yuhong focus on developing heat exchanger tubes business and has created good achievements. ASTM B163 UNS N08825 Nickel Alloy Tube is a specification for seamless nickel alloy tubes used in heat exchangers, where the base material is Incoloy 825, a nickel‑iron‑chromium alloy with molybdenum and copper – offering exceptional resistance to sulfuric acid, phosphoric acid, seawater, and chloride stress corrosion cracking.

Key Properties of Incoloy 825 for Heat Exchangers

Outstanding resistance to: Sulfuric acid (up to moderate concentrations), phosphoric acid, seawater, and reducing acids.
Excellent resistance to: Chloride stress corrosion cracking (SCC), pitting, and crevice corrosion.
High temperature oxidation resistance: Good up to ~1800°F (982°C) intermittent, ~1650°F (899°C) continuous.
Why it works: The combination of Ni-Cr-Mo-Cu provides protection in both oxidizing and reducing environments. Added Titanium stabilizes it against intergranular corrosion.

Equivalent Grades of ASTM B163 Alloy 825 UNS N08825 Nickel Alloy Seamless Tube

STANDARD	WERKSTOFF NR.	UNS	JIS	BS	GOST	AFNOR	EN	OR
Incoloy 825	2.4858	N08825	NCF 825	NA 16	ЭП703	NFE30C20DUM	NiCr21Mo	XH38BT

Chemical Composition % of ASTM B163 Alloy 825 UNS N08825 Nickel Alloy Seamless Tube

Grade	C	Mn	Si	S	Cu	Fe	Ni	Cr	Al	Ti
Incoloy 825	0.05 max	1.00 max	0.05 max	0.03 max	1.50 – 3.00	22.00 min	38.00 – 46.00	19.50 – 23.50	0.02 max	0.06 – 1.20

Mechanical properties of ASTM B163 Alloy 825 UNS N08825 Nickel Alloy Seamless Tube

Element	Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
Incoloy 825	8.14 g/cm3	1400 °C (2550 °F)	Psi – 80,000 , MPa – 550	Psi – 32,000 , MPa – 220	30 %

Non‑Destructive Testing (NDT) – Hidden Options

ASTM B163 permits either a hydrostatic test or an eddy current (ET) test for acceptance, but this creates subtle traps:

Hydrostatic test: Standard pressure = calculated from allowed fiber stress (50% of yield) but many users miss the requirement to hold pressure for at least 5 seconds per inch of OD. For gas service, a pneumatic test is not required by B163 – you must invoke ASME B31.3 or client specification.
Eddy current test: Only valid for tubes ≤ 4 inches OD. Calibration uses a 0.031” deep notch. However, ET does not detect through‑wall leaks or axial cracks. For corrosive service where pitting is possible, insist on hydrostatic or ultrasonic testing.
Hydrostatic vs. ET cost: Many mills default to ET because it is faster. Always confirm the test method on your PO.

Application

Chemical processing: Heater, reboilers, and condenser tubes in sulfuric/phosphoric acid service.
Oil & gas: Sour gas service (wet H₂S), wellhead heat exchangers, downhole tubing.
Marine: Seawater heat exchangers, evaporators, scrubbers.
Pollution control: Stack liners, flue gas desulfurization (FGD) systems.
Nuclear: Moderator cooling circuits (CANDU reactors).

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Boiler Tube

Nickel Alloy Steel Boiler Tube

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Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube