Inconel 686 polished bar
Inconel 686 polished bar is a nickel-based superalloy polished bar. It is made through precision cold rolling or hot working processes. The surface is polished to achieve high surface finish and dimensional accuracy. The main components of Inconel 686 polished bar are nickel (Ni), chromium (Cr), molybdenum (Mo), and tungsten (W). It also contains a small amount of iron (Fe) and manganese (Mn). The unique solid solution strengthening design gives it excellent corrosion resistance, high-temperature strength, and machinability.
Inconel 686 polished bar is widely used in many fields. In the chemical industry, it is used for acid gas treatment and reactor components. In the energy sector, it is used for flue gas desulfurization. In marine engineering, it is used for seawater pump shafts and flanges. In the aerospace industry, it is used for high-temperature engine parts. In the nuclear industry, it is used for nuclear waste containers. The excellent corrosion resistance, high-temperature strength, and oxidation resistance of Inconel 686 polished bar make it a key material for extreme environments. It meets the requirements of strict standards like ASTM B564.
Features of Inconel 686 polished bar
Excellent corrosion resistance:
Inconel 686 polished bar performs well in both oxidizing and reducing media. It is especially resistant to strong acids like sulfuric acid, hydrochloric acid, and phosphoric acid, as well as chloride stress corrosion. It is suitable for extreme chemical environments.
High-temperature stability:
Inconel 686 polished bar keeps high strength at temperatures up to 1200°C. Its oxidation and creep resistance are better than most nickel-based alloys, such as Inconel 625.
Excellent mechanical properties:
Inconel 686 polished bar has high tensile strength (≥760 MPa) and ductility. It can be further strengthened by cold working. The polished surface reduces the risk of fatigue cracks.
Machinability and weldability:
Though Inconel 686 polished bar is hard, it can be machined by conventional methods. It can be welded by TIG/MIG. After welding, it needs solution treatment to restore its properties.

Applications of Inconel 686 polished bar
Chemical and energy: Inconel 686 polished bar is used in valve components of acid gas treatment systems, internal parts of reactors, and flue gas desulfurization equipment.
Marine engineering: Inconel 686 polished bar is used in deep-sea pipeline flanges and seawater pump shafts, which are parts that resist seawater corrosion.
Aerospace: Inconel 686 polished bar is used in high-temperature, high-stress parts like combustion chamber liners and fasteners in engines.
Nuclear industry: Inconel 686 polished bar is used in nuclear waste treatment containers to resist radiation and corrosive media.

|
Parameter |
Specification Range/Value |
Remarks |
|
Diameter (mm) |
6 - 150 |
Custom sizes available |
|
Length (mm) |
1000 - 6000 (standard) |
Custom cut lengths possible |
|
Tolerance (mm) |
±0.05 - ±0.1 (high precision) |
Adjustable per requirements |
|
Surface Finish |
Polished (Ra ≤ 0.8 μm) |
Bright or mirror polish optional |
|
Standard |
ASTM B564 / ASME SB564 |
Compliant with international standards |
|
Supply Condition |
Annealed (solution-treated) |
Optimized for machinability |
|
Density (g/cm³) |
8.6 |
Typical for Ni-based alloys |
|
Tensile Strength (MPa) |
≥760 |
Can be increased via cold working |
|
Yield Strength (MPa) |
≥350 |
Varies with heat treatment |
|
Elongation (%) |
≥30 |
Indicates good ductility |
FAQ
Are you a factory or manufacturer?
A: Yes, we are a factory but we generally use our trading company to handle the business abroad. It will be more convenient to receive the remittance and arrange the shipment.
What is the delivery method?
A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.
Why is your product so cost-effective?
A: We cut out the middlemen in the end-to-end manufacturing process and we obtain raw material directly from its source.
Do you do spot quality inspection or full inspection?
A: 100% full inspection for sure. All unqualified products are discarded.
How do you ensure your lead time?
A: From material preparation to machining and finally to a full inspection. Every stage of production is strictly monitored and controlled to give you an accurate delivery time.
What is the MOQ of Inconel 686 polished bar ?
A: Depends on quantity, generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days which depends on the quantity and production.
What is kind of the package?
A: Generally, we use a carton case or plywood case with protective material inside to ensure the save of cargo
What is the lead time?
A: from order placed to cargo receiving will take around 10-25 days.
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