Inconel N06625 Steel Pipe

1. Standard: ASTM B444, ASME SB444, ASTM B474, ASME SB474
2. Sizes: 1/2” to 16”
3. Wall thickness: 0.5 - 20mm
4. Length: Single Random, Double Random & Cut Length

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Product Introduction

Inconel 625 seamlessly combines the inherent advantages of nickel-based alloys with the strengthening properties of molybdenum and niobium, achieving a rare balance of corrosion resistance, high-temperature strength, toughness, and manufacturability. HT PIPE is a astm b444 inconel 625 pipe supplier with 15+ export experience. Contact us for more information and quotes for free!

Why Choose Inconel 625 Pipe?

Alloy 625 pipe Corrosion Resistance

Comprehensive Protection: Excellent resistance to uniform corrosion (e.g., sulfuric acid, phosphoric acid, and organic acids), pitting, crevice corrosion, intergranular corrosion, and stress corrosion cracking (SCC).

Chloride-Resistant: Outperforms stainless steels like 316L in seawater, salt spray, and chlorinated media.

inco 625 seamless pipe High-Temperature Strength and Stability

At temperatures above 700°C, its strength retention significantly outperforms most stainless steels and comparable nickel-based alloys.

Microstructure remains stable during long-term high-temperature service, with minimal tendency to precipitate harmful phases (e.g., sigma phase).

Alloy N06625 welded pipe Cryogenic Toughness

Maintains excellent impact toughness even at liquid nitrogen temperatures (-196°C) with no brittle transition.

inconel n06625 tube Fatigue and Creep Resistance

High cyclic fatigue strength and excellent creep rupture resistance (especially in the 650-870°C range).

ASTM B444 UNS N06625 Easy Machining and Weldability

Compared to some more complex precipitation-hardening nickel-based alloys, 625 offers good hot and cold formability and excellent weldability. It can be welded using various methods, including TIG, MIG, and stick arc welding, and post-weld heat treatment is generally not required.

Material Testing of inconel 625

Hardness Test
Chemical Analysis – Spectro Analysis
Positive Material Identification – PMI Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Flaring Test
Intergranular Corrosion (IGC) Test

ASME B622 625 pipe standard

Standards	ASTM / ASME B622, B619, B626 / SB622, SB619, SB626
Outer Diameter	6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB
Thickness	0.3mm – 50 mm
Type	Seamless / ERW / Welded Pipes
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Seamless Pipes & Tubes Size	1 / 8″ NB – 24″ NB
ERW Pipes & Tubes Size	1 / 8″ NB – 36″ NB
Length	Single Random, Double Random & Required Length
End	Plain End, Beveled End, Treaded

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2.4856 alloy material Chemical composition

Element	C	Mn	Si	Fe	S	Cr2	Al-Ti	Ni
min.	-	-	-	-	-	20.0	-	58.0
max.	0.10	0.50	0.50	5.0	0.015	23.0	0.40	-

Where did Inconel 625 pipe use?

2.4856 tube in alloy Aerospace

Engine fuel/hydraulic lines, combustion chamber liner cooling pipes, and exhaust systems.
Rocket engine propellant delivery lines and combustion chamber cooling channels.
Critical hydraulic system ducting.

625 steel pipe Marine Engineering and Shipbuilding

Seawater cooling systems and heat exchanger tubes.
High-temperature/high-pressure piping in ship propulsion systems.
Subsea Christmas trees, valves, and pipelines (seawater corrosion resistance, SSC).

UNS N06625 alloy pipe in Chemical Processing and Petrochemicals

Reactors, towers, and heat exchanger piping for highly corrosive media (such as HCl, H₂SO₄, H₃PO₄, and chloride-containing media).
Sulfur and acidic oil and gas extraction and processing equipment (such as downhole tools and pipelines).
Key components of FGD (flue gas desulfurization) systems.

Inconel 625 steel pipe in Energy and Power

Nuclear Power: Control rod drive mechanism cooling tubes, reactor internals, and nuclear waste treatment equipment.
Thermal Power: High-temperature superheater/reheater tubes for high-efficiency ultra-supercritical (USC) boilers (resistant to coal ash corrosion).
Gas Turbines: Combustor transition sections and heat exchanger tubes.
Emerging Energy: Geothermal brine pipelines and heat transfer tubes for molten salt energy storage/solar thermal power generation systems.

nickel alloy no6625 tube size

1/8" (.405" O.D.)	3 1/2" ( 4.000" O.D.)
SCH 40, 80	SCH 10, 40, 80, 160, XXH
3/8" (.675" O.D.)	5" ( 5.563" O.D.)
SCH 10, 40, 80	SCH 10, 40, 80, 160, XXH
1/2" (.840" O.D.)	6" (6.625" O.D.)
SCH 5, 10, 40, 80, 160, XXH	SCH 5, 10, 40, 80, 120, 160, XXH
1/4" (.540" O.D.)	4" (4.500" O.D.)
SCH 10, 40, 80	SCH 10, 40, 80, 160, XXH
3/4" (1.050" O.D.)	8 " (8.625" O.D.)
SCH 10, 40, 80, 160, XXH	SCH 5, 10, 40, 80, 120, 160, XXH
1-1/2" (1.900" O.D.)	14" (14.000" O.D.)
SCH 10, 40, 80, 160, XXH	SCH10 (.188), SCH40 (.375)
2" (2.375" O.D.)	16" (16.000" O.D.)
SCH 10, 40, 80, 160, XXH	SCH10 (.188), SCH40(.375)
1" IPS:(1.315′ O.D.)	10" (10.750" O.D.)
SCH 5, 10, 40, 80, 160, XXH	SCH 10, 20, 40, 80 (.500), TRUE 80(.500)
1-1/4" (1.660" O.D.)	12" (12.750" O.D.)
SCH 10, 40, 80, 160, XXH	SCH 10, 20, 40(.375), TRUE40(.406), SCH80(.500)
2 1/2" (2.875" O.D.)	18" (18.000" O.D.)
SCH 10, 40, 80, 160, XXH	SCH-40 (.375)
3" ( 3.500" O.D.)
SCH 5, 10, 40, 80, 160, XXH