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Inconel 625 Nickel Alloy Tube 30-426mm OD for Auto Exhaust

Categories Precision Steel Tube
Brand Name: TORICH
Model Number: Polished Nickel Pipe
Certification: ISO9001 ISO 14001 TS16949
Place of Origin: zhejiang/China
MOQ: 1Ton
Price: 900-1200 USD/Ton
Payment Terms: L/C,D/A,D/P,T/T,Western Union,MoneyGram
Supply Ability: 60000 Ton/Tons per Year
Delivery Time: 20-30days upon products
Packaging Details: In bundles or in wooden boxes.
Application: Structure Pipe,Hydraulic Pipe,Construction,Fluid Pipe,Oil Pipe
Outer diameter(round): 30 - 426 mm
Thickness: 2 - 50 mm,0.1mm-60mm,0.3-3.5mm,1 - 8 mm,0.5 - 20 mm
Length: 6M or as requirement,As customer's require,
Standard: ASTM,DIN,GB,JIS,API
Technique: Cold Drawn,Hot Rolled,Cold Rolled,ERW,Hot Rolled/Cold Drawn
Grade: Inconel 625
Section shape: Round,Rectangular
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Inconel 625 Nickel Alloy Tube 30-426mm OD for Auto Exhaust

Polished Nickel Pipe – Inconel 625 Nickel-Based Alloy Tube for Automobile Exhaust

Material Overview

This product is a polished nickel pipe made of Inconel 625, a nickel-based superalloy renowned for its exceptional strength, corrosion resistance, and high-temperature durability, making it ideal for automobile exhaust systems.

1. Composition

ElementContent (wt%)
Nickel (Ni)≥ 58 %
Chromium (Cr)20–23 %
Molybdenum (Mo)8–10 %
Iron (Fe)≤ 5 %
Niobium + Tantalum (Nb + Ta)3.15–4.15 %
Cobalt (Co)≤ 1 %
Manganese (Mn)≤ 0.5 %
Silicon (Si)≤ 0.5 %
Aluminum (Al)≤ 0.4 %
Titanium (Ti)≤ 0.4 %
Carbon (C)≤ 0.1 %
Phosphorus (P)≤ 0.015 %
Sulfur (S)≤ 0.015 %

2. Mechanical Properties


Alloy / VariantTensile Strength (MPa)Yield Strength (MPa)Elongation (%)
Inconel 625 (general)≈ 930 MPa≈ 517 MPa≈ 42.5 %
VDM Alloy 625 (annealed)
Altemp 625™≥ 827 MPa≥ 414 MPa45 %
Inconel 625 (ASM data)880 MPa
Inconel 625LCF™769.5 MPa319 MPa63 %

3. Key Features

  • Solid solution strengthened, with Mo and Nb imparting high strength—no precipitation hardening required.

  • High fatigue, creep, and thermal fatigue strength over a wide temperature range, from cryogenic up to ~982 °C (1800 °F).

  • Excellent resistance to oxidation, carburization, pitting, crevice corrosion, and nearly immune to chloride stress-corrosion cracking.

  • Readily weldable and fabricable with standard processes; excellent machinability in annealed condition.

4. Applicable Standards

Common specifications and standards for Inconel 625 include:

  • ASTM / ASME: B444/B705 (pipe/tube), B704 (welded tube), B443/B446 (plate/bar)

  • International: EN 2.4856, ISO 6207, AMS 5599/5666/5837/5869, ASME SB443/446

In pipe manufacturing contexts (for polished or bright finishes):

  • ASTM B167 / B444, ASME SB167 / SB444, ASTM B829, AMS 5581

5. Applications in Automobile Exhaust Systems

General Application Domains:

  • Automotive & Aerospace: Exhaust ducts, turbocharger systems, engine components, thrust-reversers

  • Marine / Chemical / Energy: Flare stacks, turbine ducting, chemical handling, nuclear components

Automobile Exhaust-Specific Uses:

  • Exhaust headers/manifolds: Excellent at withstanding cyclic thermal loads and corrosive gas exposure.

  • Turbocharger housings & downstream ducting: Benefit from oxidation resistance and high-temperature strength.

  • Downstream exhaust piping: Polished Inconel 625 resists road corrosion (salt and chemical exposure) and maintains structural integrity under thermal cycling.




Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.


Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock,

it is according to quantity.


Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.


Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.



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