Inconel 625 Pipe Inconel Nickel Alloy ASTM Standard For Marine And Nuclear Applications

Inconel 625 pipe

1 . Introduction

Inconel Alloy 625 (UNS designation N06625) is a nickel-based superalloy that possesses

high strength properties and resistance to elevated temperatures. It also demonstrates

remarkable protection against corrosion and oxidation. Its ability to withstand high stress

and a wide range of temperatures, both in and out of water, as well as being able to resist

corrosion while being exposed to highly acidic environments makes it a fitting choice for

nuclear and marine applications.

Inconel 625 was developed in the 1960s with the purpose of creating a material

that could be used for steam-line piping. Some modifications were made to its

original composition that have enabled it to be even more creep-resistant and

weldable. Because of this, the uses of Inconel 625 have expanded into a wide range

of industries such as the chemical processing industry, and for marine and nuclear

applications to make pumps and valves and other high pressure equipment.

2.Chemistry

Some chemical properties of Inconel 625 include:

ASTM (American Society for Testing and Materials) for various products made

out of Inconel 625 are as follow:

4.Specifications

• AMS: 5599, 5666

• MS: 5837

• ASME: SB 443 Gr 1, SB 446 Gr 1

• ASTM: B 443 Gr 1, B 446 Gr 1

• EN: 2.4856

• ISO: 15156-3

• NACE: MR0175-3

• UNS: N06625

• Werkstoff: 2.4856

5.Heat Treatment

Heat Treatment Inconel 625 is usually strengthened by cold work, with annealing at

temperatures between 1,700 and 1,900F as required to remove the effects of cold work.

Although nominally a solid-solution alloy containing intergranular and intragranular

carbide precipitates, Inconel 625 is not responsive to strengthening heat treatments.

Solution heat treating at 2000 to 2200F dissolves almost all of the secondary carbides.

The major effects of short-time annealing of hot-rolled bar of standard composition are

to affect reductions in tensile strength and hardness.Typically, the annealing heat

treatment most utilized for Inconel 625 is at 1800F.

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Nickel and iron base Alloy(KCF alloy, Nickel alloy)

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