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
| Element | Content (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 / Variant | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| Inconel 625 (general) | ≈ 930 MPa | ≈ 517 MPa | ≈ 42.5 % |
| VDM Alloy 625 (annealed) | — | — | — |
| Altemp 625™ | ≥ 827 MPa | ≥ 414 MPa | 45 % |
| Inconel 625 (ASM data) | 880 MPa | — | — |
| Inconel 625LCF™ | 769.5 MPa | 319 MPa | 63 % |
3. Key Features
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Solid solution strengthened, with Mo and Nb imparting high strength—no precipitation hardening required.
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High fatigue, creep, and thermal fatigue strength over a wide temperature range, from cryogenic up to ~982 °C (1800 °F).
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Excellent resistance to oxidation, carburization, pitting, crevice corrosion, and nearly immune to chloride stress-corrosion cracking.
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Readily weldable and fabricable with standard processes; excellent machinability in annealed condition.
4. Applicable Standards
Common specifications and standards for Inconel 625 include:
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ASTM / ASME: B444/B705 (pipe/tube), B704 (welded tube), B443/B446 (plate/bar)
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International: EN 2.4856, ISO 6207, AMS 5599/5666/5837/5869, ASME SB443/446
In pipe manufacturing contexts (for polished or bright finishes):
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ASTM B167 / B444, ASME SB167 / SB444, ASTM B829, AMS 5581
5. Applications in Automobile Exhaust Systems
General Application Domains:
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Automotive & Aerospace: Exhaust ducts, turbocharger systems, engine components, thrust-reversers
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Marine / Chemical / Energy: Flare stacks, turbine ducting, chemical handling, nuclear components
Automobile Exhaust-Specific Uses:
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Exhaust headers/manifolds: Excellent at withstanding cyclic thermal loads and corrosive gas exposure.
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Turbocharger housings & downstream ducting: Benefit from oxidation resistance and high-temperature strength.
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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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