Alloy 625 seamless pipe
Alloy 625 seamless pipe
Alloy 625 seamless pipe
Alloy 625 seamless pipe
Alloy 625 seamless pipe
Alloy 625 seamless pipe
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Product Introduction
TOKO TECH Nickel Alloy 625 (UNS N06625) Seamless Pipe Product ​
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TOKO TECH Nickel Alloy 625 (commercially known as Inconel 625) seamless pipe is a nickel‑chromium‑molybdenum‑niobium alloy designed for extreme environments requiring exceptional corrosion resistance, high‑temperature strength, and excellent fatigue performance. Manufactured via hot‑extrusion or cold‑drawing processes, the seamless structure ensures superior pressure integrity and reliability for critical applications in aerospace, marine, chemical processing, and energy industries.

Key Features & Advantages​

Feature
Description
Outstanding Corrosion Resistance​
Resists pitting, crevice corrosion, and oxidation in chloride‑containing media, acidic/alkaline solutions, and seawater. Suitable for sour (H₂S/CO₂) service.
High‑Temperature Strength​
Maintains excellent tensile, creep, and rupture strength up to 980 °C (1800 °F).
Excellent Fatigue & Vibration Resistance​
Ideal for dynamic load applications (e.g., offshore risers, exhaust systems).
Good Fabricability​
Can be welded, machined, and formed using standard methods; post‑weld heat treatment is generally not required.
Seamless Integrity​
No longitudinal weld, eliminating a potential failure point; uniform microstructure ensures consistent performance.

Chemical Composition (Typical wt.%, per ASTM B444/ASME SB444)​

Element
Ni
Cr
Mo
Nb (+Ta)
Fe
C
Mn
Si
Al
Ti
P
S
Content​
≥58.0
20.0–23.0
8.0–10.0
3.15–4.15
≤5.0
≤0.10
≤0.50
≤0.50
≤0.40
≤0.40
≤0.015
≤0.015
Niobium (Nb) acts as a solid‑solution strengthener and stabilizer.

Mechanical Properties (Room Temperature, Typical)​

Property
Value
Test Standard
Tensile Strength​
≥760 MPa (110 ksi)
ASTM E8
Yield Strength (0.2% offset)​
≥345 MPa (50 ksi)
ASTM E8
Elongation​
≥30%
ASTM E8
Hardness (Rockwell B)​
≤100 HRB
ASTM E18

Available Specifications​

Parameter
Range / Description
Outer Diameter (OD)​
6 mm – 300 mm (custom sizes available)
Wall Thickness (WT)​
1.0 mm – 30 mm (depending on OD)
Length​
Up to 12 m (standard), longer lengths on request
Standards​
ASTM B444 / ASME SB444, ASTM B829, NACE MR0175/ISO 15156
Delivery Condition​
Solution‑annealed, pickled & passivated; bright annealed available

Primary Applications​

Industry
Typical Applications
Aerospace​
Engine exhaust ducts, thrust‑reverser components, fuel‑line tubing
Marine & Offshore​
Seawater piping, ballast systems, subsea umbilicals, risers
Oil & Gas​
Downhole tubing, control lines, sour‑service flowlines, Christmas‑tree components
Chemical Processing​
Reactor coils, acid‑pickling tanks, heat‑exchanger tubes, chloride‑containing process lines
Power Generation​
Gas‑turbine exhaust systems, boiler tubing, flue‑gas desulfurization (FGD) units
Nuclear​
Control‑rod drive mechanisms, reactor‑coolant piping

Quality Assurance​

Check Item
Method / Standard
Chemical Analysis​
Optical Emission Spectrometry (OES) / ASTM E1473
Mechanical Testing​
Tensile, hardness, flattening, flaring / ASTM E8, E18, B829
Non‑Destructive Testing (NDT)​
Eddy‑current (ET) or ultrasonic (UT) testing per ASTM E426 / E213
Hydrostatic Testing​
Per ASTM B829 (optional, as specified)
Certification​
EN 10204‑3.1/3.2 material certificates, NACE compliance reports

Contact TOKO TECH​ for a detailed quotation, technical datasheet, or project‑specific consultation. We deliver high‑integrity Alloy 625 seamless pipes for the world’s most demanding service environments.
TOKO TECH – Engineered Alloys for Extreme Performance.
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