ASTM B444, Nickel-Chromium-Molybdenum-Columbium Alloy Tubes, UNS N06625, UNS N06852, Nickel-Chromium-Molybdenum-Silicon Alloy Tube, UNS N06219, Seamless Pipe, Seamless Tube, UNS N06625, 2.4856, Inconel 625, 0Cr20Ni65Mo10Nb4, NiCr22Mo9Nb, FH, Nickel and Nickel Alloy Tubes, ASTM B444 UNS N06625 (Incoloy 625), Standard ASTM B444

ASTM B444 Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloys (UNS N06625 and UNS N06852) and Nickel-Chromium-Molybdenum-Silicon Alloy (UNS N06219) Pipe and Tube

Standard: ASTM B444

Material: UNS N06625
Equivalent Material: 2.4856, Inconel 625, 0Cr20Ni65Mo10Nb4, NiCr22Mo9Nb

Chemistry Composition

Ni, %

Mn, %

P, %

S, %

Si, %

Cr, %

Mo, %

C, %

Co, %

Fe, %

Al, %

Ti, %

Nb+Ta, %

58.0 min

0.50 max

0.015 max

0.50 max

20.0-23.0

8.00-10.0

0.10 max

1.00 max

5.00 max

0.40 max

3.15-4.15

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %
827 min	414 min	30 min	Grade 1
690 min	276 min	30 min	Grade 2

Outside Diameter & Tolerance

Outside Diameter, mm	OD Tolerance, mm	ID Tolerance, mm
OD＜2.4	+0.05/-0	+0/-0.05
2.4≤OD＜4.8	+0.08/-0	+0/-0.08
4.8≤OD＜12.7	+0.10/-0	+0/-0.10
12.7＜OD≤31.8	+0.13/-0	+0/-0.13

Wall thickness & Tolerance

Outside Diameter, mm	Tolerance, %
OD＜2.4	±10
2.4≤OD＜4.8	±10
4.8≤OD＜12.7	±10
12.7＜OD≤31.8	±10

Length: 5800mm; 6000mm; 6096mm; 7315mm; 11800mm; 12000mm; and so on.
Max developed length: 32 meters, also U bending can be offered, each leg length can be 15.24 meters.

Keyword: ASTM B444, Nickel-Chromium-Molybdenum-Columbium Alloy Tubes, UNS N06625, UNS N06852, Nickel-Chromium-Molybdenum-Silicon Alloy Tube, UNS N06219, Seamless Pipe, Seamless Tube

More information about Inconel 625

Inconel 625, Also named as Alloy 625 is a corrosion and oxidation resistant nickel alloy that is used both for its high strength and outstanding aqueous corrosion resistance. Its outstanding strength and toughness is due to the addition of niobium which acts with the molybdenum to stiffen the alloy’s matrix. Alloy 625 has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. This nickel alloy has excellent weldability and is frequently used to weld AL-6XN. This alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion. Some typical applications Inconel 625 is used in are chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors.

The characteristics of Inconel 625

- High creep-rupture strength
- Oxidation resistant to 1800° F
- Seawater pitting and crevice corrosion resistant
- Immune to chloride ion stress corrosion cracking
- Non-magnetic

The applications of Inconel 625

- Aircraft ducting systems
- Aerospace
- Jet engine exhaust systems
- Engine thrust-reverser systems
- Specialized seawater equipment
- Chemical process equipment

Fabrication with Inconel 625

Alloy 625 has excellent forming and welding characteristics. It may be forged or hot worked providing temperature is maintained in the range of about 1800-2150° F. Ideally, to control grain size, finish hot working operations should be performed at the lower end of the temperature range. Because of its good ductility, alloy 625 is also readily formed by cold working. However, the alloy does work-harden rapidly so intermediate annealing treatments may be needed for complex component forming operations. In order to restore the best balance of properties, all hot or cold worked parts should be annealed and rapidly cooled. This nickel alloy can be welded by both manual and automatic welding methods, including gas tungsten arc, gas metal arc, electron beam and resistance welding. It exhibits good restraint welding characteristics.

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