Inconel 690 square plate
Inconel 690 square plate is a nickel-based high-temperature alloy plate. It is made into a square shape by hot rolling or cold rolling. It has excellent corrosion resistance, high-temperature strength, and oxidation resistance.
Its typical composition is nickel (≥58%), chromium (28-31%), and iron (9-11%). It also has small amounts of carbon, manganese, silicon, and other elements. It is used in extreme industrial environments.
It is widely used in nuclear power (steam generators, pressure vessels), chemical industry (acid washing equipment, heat exchangers), aerospace (combustion chamber parts), and environmental energy (incinerator linings). Its excellent corrosion resistance, high-temperature stability, and long life make it a key material in extreme environments. It greatly improves the safety and durability of equipment.
Features of Inconel 690 square plate
Excellent Corrosion Resistance: Inconel 690 square plate is very resistant to acid media (like nitric acid and sulfuric acid), chloride stress corrosion cracking (SCC), and alkali solutions. It performs very well in the high-temperature, high-pressure water environment of nuclear power plants.
High-Temperature Stability: Inconel 690 square plate can keep its high strength and oxidation resistance below 980°C. It can work at temperatures above 550°C for a long time.
High Processing Requirements: Inconel 690 square plate needs special processing techniques like laser cutting or plasma cutting. For welding, it is best to use matching welding materials (such as ENiCrFe-7).
Long Life and Cost-Effectiveness: Although Inconel 690 square plate costs more than stainless steel at first, its low maintenance needs and long service life can reduce the total cost.

Applications of Inconel 690 square plate
Nuclear Power: Inconel 690 square plate is used for heat transfer tubes in steam generators and liners of reactor pressure vessels to resist corrosion from high-temperature, high-pressure water.
Chemical Equipment: Inconel 690 square plate is used to make acid washing tanks, heat exchangers, and parts of flue gas desulfurization systems.
Aerospace: Inconel 690 square plate is used for combustion chamber components and exhaust ducts in high-temperature structures.
Environmental Energy: Inconel 690 square plate is used for the lining of waste incinerators and containers for nuclear waste treatment to withstand corrosive gases and molten salts.

|
Parameter |
Specification Range |
Unit |
Remarks |
|
Thickness |
5 – 100 |
mm |
Customizable (e.g., 2mm or up to 150mm) |
|
Width |
500 – 2000 |
mm |
Common: 1000mm, 1500mm |
|
Length |
1000 – 6000 |
mm |
Standard: 2000mm, 3000mm |
|
Surface Finish |
Hot Rolled, Cold Rolled |
– |
Optional: Polished, Pickled |
|
Standard |
ASTM B168, ASME SB168 |
– |
Compliant with nuclear/chemical industry |
|
Density |
~8.19 |
g/cm³ |
Typical for Ni-based alloy |
|
Tensile Strength |
≥550 |
MPa |
At room temperature |
|
Yield Strength |
≥240 |
MPa |
At room temperature |
|
Max Operating Temp. |
550 (long-term), 980 (short-term) |
°C |
Excellent oxidation resistance |
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 690 square plate ?
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.
Hot Tags: inconel 690 square plate, China inconel 690 square plate suppliers, factory, Inconel 625 Pipe, Kovar Seamless Pipe, Nickel Based Alloys




