ASTM B622 Seamless Pipes and Tubes

SSM supplies Hastelloy Seamless Pipes and Tubes

ASTM B622 Hastelloy C276 C22 B2 Seamless Pipes and Tubes

ASTM B622 seamless pipes and tubes offered by SSM are made from Hastelloy alloys, which provide exceptional corrosion resistance and mechanical properties. They are widely used in industries where resistance to highly corrosive environments and high temperatures is critical. The seamless construction offers uniform properties and high integrity, making them a reliable choice for critical applications.

When ordering our products, please provide the following information:
– ALLOY C276, C22, or B2
– Tube Size: outer diameter, minimum or average wall thickness, length
– Pipe: standard size and schedule
– Port type: plain ends, cut and deburred will be provided

The following information pertains to the material and physical properties of ALLOY C276, C22, and B2, which will be useful for your purchase.

Chemical Composition & Mechanical Properties

Chemical composition and physical properties of the common C276, C22, and B2 grades in ASTM B622 Seamless Hastelloy pipes.
These data show the typical chemical composition and physical properties of the Hastelloy alloys, C276, C22, and B2.

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%

Comparison between ASTM B622 and ASTM B619 Hastelloy Pipes

Characteristic	Seamless Pipe	Welded Pipe
Manufacturing Process	Made from extruding, drawing, or spinning solid billets	Made by rolling and welding metal sheets or coils
Weld Seam	No weld seam	Contains longitudinal or spiral weld seam
Mechanical Properties	Generally have higher strength and uniformity	Mechanical properties may be slightly lower, especially at the weld seam
Corrosion Resistance	Excellent corrosion resistance, no issues from welds	Weld seam can be a weak point in corrosive environments
Dimensional Tolerance	Tighter and more uniform tolerances	Tolerances may be slightly larger, especially at the weld area
Internal Surface Quality	Typically smooth with no weld-related defects	Weld seam may cause uneven surface or defects

Advantages and Disadvantages of ASTM B622 Hastelloy Pipes

Advantages: Hastelloy seamless pipes have no welds, which reduces the risk of welding defects and improves the overall strength and durability of the material. The alloy has excellent corrosion resistance in oxidizing and reducing media. It can maintain good mechanical properties under high-temperature conditions.

Disadvantages: It contains many precious alloying elements and costs relatively high. Due to the particularity and high cost of Hastelloy alloys, the supply of these pipes in the market may be limited, and some specifications of products may require a longer delivery time.