ASTM B619 Welded Hastelloy Pipe

The ASTM B619 welded Hastelloy pipe features excellent corrosion resistance, effectively resisting chlorides, acidic media, and oxidizing substances in harsh environments.

ASTM B619 Welded Hastelloy C276 C22 B2 Pipe

SSM offers high-quality welded Hastelloy pipes made from various materials, each designed for specific applications.

Hastelloy C-276 (UNS N10276) provides excellent resistance to both oxidation and reduction, making it ideal for handling mixtures of oxidizing and reducing acids.
Hastelloy C-22 (UNS N06022) features a broader range of corrosion resistance, effectively resisting various corrosive media, including oxidizing, reducing, and mixed acids.
Hastelloy B-2 (UNS N10665) excels in resisting reduction and chlorides at medium and high temperatures but is sensitive to oxidizing environments. Customers can refer to the parameters provided to select the most suitable steel pipes for their needs.

ASTM B619 Welded Hastelloy C276 C22 B2 pipe supplier, SSM provides product parameters as shown in the following table:

Items	Parameters
OD	NPS 1/8″ – NPS 48″
WT	SCH 5S 10S 40S 80S IN ANSI B36.19
Length	20 feet (6 meters) or 40 feet (12 meters), according to customer requirements.
Grade	Hastelloy C276 / Hastelloy C22 / Hastelloy B2
Standards	ASTM B619 / ASME B36.19 M

Hastelloy C276 Welded Pipe

ASTM B619 Hastelloy C276 welded pipe refers to welded pipes manufactured from Hastelloy C276 alloy that complies with the ASTM B619 standard. This alloy is a nickel-based material known for its exceptional corrosion resistance and high-temperature performance, widely used in the chemical, oil, gas, and other harsh environments.

Hastelloy C22 Welded Pipe

ASTM B619 Hastelloy C22 welded pipe refers to welded pipes manufactured from Hastelloy C22 alloy that complies with the ASTM B619 standard. Hastelloy C22 is a nickel-chromium-molybdenum alloy known for its exceptional corrosion resistance and oxidation resistance, particularly in environments with chlorides and oxidizing media.

Hastelloy B2 Welded Pipe

Chemical Composition & Mechanical Properties

Chemical composition and physical properties of the common C276, C22, and B2 grades in ASTM B619 welded Hastelloy pipes.
These data show the typical chemical composition and physical properties of the Hastelloy alloys, C276, C22, and B2. They perform well in highly corrosive environments and are particularly suitable for chemical processing, oil and gas, offshore engineering, and other fields.

Chemical Composition

Element	Hastelloy C276	Hastelloy C22	Hastelloy B2
Nickel (Ni)	Balance	Balance	Balance
Chromium (Cr)	14.5-16.5%	20.0-22.5%	0.5-1.5%
Molybdenum (Mo)	15.0-17.0%	12.5-14.5%	26.0-30.0%
Tungsten (W)	3.0-4.5%	2.5-3.5%	–
Iron (Fe)	4.0-7.0%	2.0-6.0%	1.0-3.0%
Cobalt (Co)	≤ 2.5%	≤ 2.5%	≤ 1.0%
Manganese (Mn)	≤ 1.0%	≤ 0.5%	≤ 1.0%
Carbon (C)	≤ 0.01%	≤ 0.015%	≤ 0.01%
Silicon (Si)	≤ 0.08%	≤ 0.08%	≤ 0.1%
Sulfur (S)	≤ 0.03%	≤ 0.02%	≤ 0.03%
Vanadium (V)	–	–	–

Physical Properties

Property	Hastelloy C276	Hastelloy C22	Hastelloy B2
Density	8.89 g/cm³	8.69 g/cm³	9.24 g/cm³
Melting Range	1325-1370°C	1357-1430°C	1330-1380°C
Tensile Strength	≥ 690 MPa	≥ 690 MPa	≥ 760 MPa
Yield Strength	≥ 283 MPa	≥ 310 MPa	≥ 345 MPa
Elongation	≥ 40%	≥ 45%	≥ 40%

ASTM B619 requirements for manufacturing and treatment of nickel alloys

The standard covers two classes of pipes, which are differentiated by their manufacturing and treatment processes.

Class I:

Pipes in this class are either:
As welded and solution annealed: The pipe is welded and then heat-treated (solution annealed) to enhance its mechanical properties and corrosion resistance.
Welded and sized and solution annealed: After welding, the pipe is resized (usually to ensure precise dimensions) and then solution annealed.

Class II:

Pipes in this class undergo a more rigorous process:
Welded, cold worked, and solution annealed: After welding, the pipe is cold worked (which involves deforming the pipe at room temperature to improve strength) and then solution annealed.

Condition of Supply:

All pipes must be provided in a “solution annealed and descaled condition.” This means:
Solution Annealed: The pipes are heat-treated to dissolve any precipitates and homogenize the microstructure, improving corrosion resistance and mechanical properties.
Descaled: The removal of surface oxides and scales, which are common after heat treatment.
Exception: If the pipes are manufactured using an atmosphere-controlled process (which prevents oxidation during heat treatment), descaling may not be necessary.
This classification and treatment process ensures the pipes meet the required standards for mechanical strength and corrosion resistance, making them suitable for demanding applications, especially in corrosive environments.

Advantages and Disadvantages of ASTM B619 Hastelloy Pipes

Advantages: It is resistant to chloride corrosion, performs well in chloride-containing environments, performs very well in oxidizing and reducing environments, maintains good mechanical properties at high temperatures, and is suitable for high-temperature applications such as power plants and petrochemical facilities.

Disadvantages: Hastelloy pipes are more expensive than other materials (such as stainless steel or carbon steel) due to the high cost of alloying elements (nickel, molybdenum, etc.) and complex manufacturing processes. Their high strength and toughness make them more difficult to machine, form, and manufacture than conventional materials.

ASTM B619 Hastelloy pipes provide excellent corrosion resistance and high-temperature performance, making them indispensable in harsh environments. However, the high cost and processing challenges require careful consideration when selecting these materials for specific applications.