Inconel UNS N06625 Cold Drawn Bright Seamless Pipe

Inconel UNS N06625 Cold drawn Seamless Pipe

UNS N06625 (Inconel 625) cold drawn bright seamless tube is a nickel-based high temperature alloy precision tube made by cold drawing process and surface bright treatment, with excellent comprehensive performance. Its core features are: maintaining high strength (room temperature tensile strength ≥930 MPa) and excellent fatigue resistance in the extreme temperature range of -200℃ to +1000℃; with high nickel (≥58%), chromium (20-23%) and molybdenum (8-10%) content, it has excellent tolerance to chloride stress corrosion, pitting and oxidizing/reducing media (such as seawater, acid gas, strong alkali); at the same time, due to the stable austenite structure and niobium solid solution strengthening effect, it can still maintain creep resistance in high temperature environment. The tube has high surface finish (Ra≤0.8μm) and dimensional accuracy of ±0.05mm, which is particularly suitable for harsh environments such as aerospace engine pipelines, marine engineering pressure-resistant components, nuclear power heat exchangers and chemical high-pressure reaction devices.

The following is the performance table of UNS N06625 (Inconel 625) cold drawn bright annealed seamless pipe:

Category	Properties
Grade	UNS N06625 / Inconel 625 / W.Nr. 2.4856
Standards	ASTM B444 / ASTM B829 / AMS 5581 / NACE MR0175 (corrosion-resistant)
Manufacturing	Cold-Drawn + Bright Annealed, seamless
Surface Finish	Polished (Ra ≤ 0.8 μm) or Pickled
Size Range	OD: 3~150 mm, Wall Thickness: 0.5~10 mm (custom high precision ±0.05mm)
Chemical Composition (%)	Ni≥58, Cr 20-23, Mo 8-10, Nb 3.15-4.15, Fe≤5, C≤0.10, Al+Ti≤0.40
Mechanical Properties	- Tensile Strength (Rm): ≥930 MPa - Yield Strength (Rp0.2): ≥517 MPa - Elongation (A50mm): ≥30% - Hardness: ≤250 HB (annealed)
Temperature Resistance	- Operating Range: -200°C ~ +1000°C - Short-term Peak: 1100°C (excellent oxidation resistance)
Corrosion Resistance	Resistant to chloride stress corrosion (SCC), seawater, acids/alkalis (H₂SO₄, HCl), and high-temperature oxidation
Physical Properties	- Density: 8.44 g/cm³ - Melting Point: 1290~1350°C - Thermal Conductivity: 9.8 W/m·K (20°C)
Typical Applications	Aircraft engine tubing, offshore hydraulic systems, nuclear heat exchangers, chemical reactors, oil & gas corrosion-resistant piping

Nickel Alloy 625 seamless pipes chemical composition

Grade	Si	Cu	C	Mn	S	Fe	Cr	Ni
Inconel 625	0.50 maximum	–	0.10 maximum	0.50 maximum	0.015 maximum	5.0 maximum	20.0 – 23.0	58.0 min

The following is a table of common sizes of UNS N06625 (Inconel 625) cold drawn bright annealed seamless pipes in the market:

OD (mm)	Standard WT (mm)	Typical Applications
3~10	0.5~2.0	Precision instruments, medical devices, micro-fluidic systems
12~25	1.0~3.0	Aircraft hydraulic lines, semiconductor equipment, chemical metering systems
26~50	1.5~5.0	Offshore hydraulic tubing, nuclear cooling systems, high-temperature sensor sleeves
51~100	2.0~8.0	Petrochemical reactor piping, gas turbine fuel lines, high-pressure heat exchangers
102~150	3.0~10.0	Large marine structural components, refinery corrosion-resistant main pipelines

GNEE Group UNS N06625 Cold drawn Bright ss Pipe Factory Environment

GNEE Group Inconel UNS N06625 Cold drawn Bright Pipe Packaging

GNEE Group Inconel UNS N06625 ss Pipe Testing

What is the maximum size of nickel alloy 625 straight seam welded pipe?
8 inches
What is the melting point of nickel alloy 625 pipe?
1290-1350°C | 2350-2460°F
What are the typical manufacturing specifications for Inconel 625 welded pipe?
AMS 5581
ASTM B444
BS 3074
What is the temperature range of alloy 625 pipe?
538°C to 593°C.
What are the most common applications for WNR 2.4856 seamless pipe?
Heat exchangers
Natural gas pipeline control lines
Petroleum refining

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