Incoloy 825 Seamless Tube

UNS N08825 | 2.4858 | ASTM B423

Incoloy 825 Seamless Tube (N08825 / 2.4858) is manufactured to ASTM B423 from tube billet, cold-drawn to the required outside diameter and wall thickness. Supplied from our Wenzhou mill with EN 10204 3.1 mill test certificate, PMI and dimensional inspection on request.

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Incoloy 825 825 Tube?

Item	Description
	SeamlessIncoloy 825Tube is a high-performance, corrosion-resistant tube made from a solid billet of a nickel-iron-chromium superalloy. Unlike welded tubes, it is produced without any weld seam, ensuring superior structural integrity and reliability, especially in highly corrosive environments. The"Incoloy 825"designation refers to a specific grade known for its exceptional resistance to a wide range of corrosive media, including acids and bases. The alloy's unique composition, which includes controlled additions of molybdenum, copper, and titanium, provides outstanding resistance to stress-corrosion cracking, pitting, and crevice corrosion. This makes it an ideal choice for demanding applications in harsh chemical and industrial settings where other materials would quickly fail.

Item

Description

SeamlessIncoloy 825Tube is a high-performance, corrosion-resistant tube made from a solid billet of a nickel-iron-chromium superalloy. Unlike welded tubes, it is produced without any weld seam, ensuring superior structural integrity and reliability, especially in highly corrosive environments. The"Incoloy 825"designation refers to a specific grade known for its exceptional resistance to a wide range of corrosive media, including acids and bases. The alloy's unique composition, which includes controlled additions of molybdenum, copper, and titanium, provides outstanding resistance to stress-corrosion cracking, pitting, and crevice corrosion. This makes it an ideal choice for demanding applications in harsh chemical and industrial settings where other materials would quickly fail.

Key Features and Advantages of Seamless Incoloy 825 Tube

Feature	Description
	Seamless Incoloy 825 Tube offer a unique combination of benefits that make them invaluable in the most demanding industries:
	Excellent General Corrosion Resistance: Provides outstanding resistance to a variety of acids, particularly sulfuric and phosphoric acids.
	Resistance to Stress-Corrosion Cracking: The high nickel content makes the alloy highly resistant to chloride-ion stress-corrosion cracking.
	High Pitting and Crevice Corrosion Resistance: The presence of molybdenum and chromium provides excellent resistance to localized corrosion in aggressive environments.
	High PressureTolerance: The seamless construction eliminates a potential weak point, allowing the tube to safely handle high internal pressures, which is critical in many fluid transfer and structural applications.
	Superior Weldability: Despite its high-alloy content, Incoloy 825 is known for its excellent weldability, which is a significant advantage for fabrication and installation.

Product Specifications and Data of Seamless Incoloy 825 Tube

To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Incoloy 825.

The composition of Incoloy 825 is carefully balanced to achieve its superior corrosion resistance.

Chemical Composition of Incoloy 825

Grade	Ni	Cr	Fe	Mn	C	Cu	Si	S	Al	Mo	Ti
Incoloy 825	38.00-46.00	19.50-23.50	≥22.00	≤1.00	≤0.05	1.50-3.00	≤0.50	≤0.03	≤0.20	2.50-3.50	0.60-1.20

Incoloy 825 is specifically designed to maintain its strength and shape in high-stress, corrosive environments.

Typical Mechanical Properties of Incoloy 825

Tensile Strength	Yield Strength	Elongation	Hardness
≥ 586 MPa	≥ 241 MPa	≥ 30%	≤ 192 HBW

These physical properties highlight the material's ability to perform reliably under a wide range of conditions.

Typical Physical Properties of Incoloy 825

Density	Melting Point	Thermal Expansion	Thermal Conductivity	Modulus of Elasticity	Electrical Resistivity
8.14 g/cm³	1340 - 1400 °C approx.	14.0 µm/m·°C (20-100°C)	11.1 W/m·K (20°C)	195 GPa	1.14 x 10⁻⁶ Ω·m (20°C)

Table 4: The Standard of Seamless Incoloy 825 Tube ASTM B163 Size Tolerance Chart (mm):

STANDARD	OD[D]	TOLERANCE	THICKNESS[S]	TOLERANCE	LENGTH	TOLERANCE
B163 (N02200,N02201,N04400)	12.7≤D＜15.9	+0.13/0	ave, ±12.5%	min:+25.0%/0	Cut-to-length	+3.2/-0
	15.9≤D≤38.1	±0.13	ave, ±10.0%	min:+20.0%/0
	38.1＜d≤76.2	±0.25	ave, ±10.0%	min:+22.0%/0
B163(for rest)	12.7≤D＜15.9	±0.13	ave, ±12.5%	min:+25.0%/0	Cut-to-length:>9.1m	+6.4/0
	15.9＜d≤38.1	±0.19	ave, ±10.0%	min:+20.0%/0
	38.1＜d≤76.2	±0.25	ave, ±10.0%	min:+22.0%/0

Common Applications of Seamless Incoloy 825 Alloy steel Tube

Industry	Typical Applications
	The combination of high corrosion resistance and high strength of Incoloy 825 seamless tubes makes them a preferred choice for:
	Chemical Processing: Used in heat exchangers, pressure vessels, and piping for handling sulfuric acid, phosphoric acid, and other corrosive chemicals.

Oil and Gas Industry: In sour gas service and offshore platforms where resistance to stress corrosion cracking is critical.

Pollution Control: In scrubbers and stack liners for flue-gas desulfurization (FGD) systems.

Nuclear Industry: In fuel reprocessing plants and waste handling equipment.

Frequently Asked Questions About Incoloy 825 Seamless Tubes

Which standards does Incoloy 825 Seamless Tube comply with?

Incoloy 825 Seamless Tube is produced to ASTM B163, ASTM B423.

What are the typical applications of Incoloy 825 Seamless Tube?

The combination of high corrosion resistance and high strength of Incoloy 825 seamless tubes makes them a preferred choice for:

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Send us your specification for Incoloy 825 seamless tube — OD, wall thickness, standard and quantity — and our engineering team will reply with a quotation within 24 hours.