ASTM B622 Hastelloy Pipe Mechanical Properties

Hastelloy is a trademarked name for a group of corrosion-resistant nickel-based alloys. ASTM B622 is the standard specification for seamless pipes and tubes made of nickel and nickel-cobalt alloys including Hastelloy. When it comes to mechanical properties, ASTM B622 sets requirements for various aspects such as tensile strength, yield strength, elongation, and hardness.

ASTM B622 Hastelloy Pipe Grades

ASTM B622/ASME SB 622 is a standard specification that covers seamless nickel and nickel-cobalt alloy pipe and tube. A total of 32 nickel alloy grades are included in ASTM B622. However, there are only 12 most commonly used grades among them. The product range of ASTM B622 is only seamless pipe & tube. Seamless pipes are a pipe / tube materials without welds. It is generally produced by cold rolling or cold drawing. Because there are no welds, it has a stronger pressure-bearing capacity than welded pipes.

• Inconel 686 (UNS N06686)
• Hastelloy B (UNS N10001)
• Hastelloy B-2 (UNS N10665)
• Hastelloy B-3 (UNS N10675)
• Hastelloy C-4 (UNS N06455)
• Hastelloy C-22 (UNS N06022)
• Hastelloy C-276 (UNS N10276)
• Hastelloy C-2000 (UNS N06200)
• Hastelloy G-3 (UNS N06985)
• Hastelloy G-30 (UNS N06030)
• Hastelloy G-35 (UNS N06035)
• Hastelloy X (UNS N06002)

ASTM B622 Hastelloy Pipe Mechanical Properties

The alloys in ASTM B622 are basically solid solution strengthened alloys. Because these alloys contain ideal solid solution strengthening elements such as molybdenum and tungsten, their strength is among the best among solid solution strengthening alloys. It is also true that these alloys are more difficult for the manufacture of seamless tubes. Therefore, their price will be much more expensive than other product forms.