ASTM B626 Nickel-Cobalt Alloy Tube For Industry
Material Specification
ASTM B626 covers welded nickel and nickel-cobalt alloy tubes intended for general corrosion-resisting and low- or high-temperature service. The specification includes several UNS designations, each representing a unique alloy with distinct properties suitable for various industrial applications.
Key Features
- Corrosion Resistance: These alloys offer excellent resistance to a wide range of corrosive environments, including acidic, alkaline, and chloride-containing atmospheres.
- High-Temperature Performance: Suitable for high-temperature applications due to their stability and strength at elevated temperatures.
- Versatility: Can be used in various industries, including chemical processing, power generation, and oil and gas.
Chemical Composition
The chemical composition of these alloys is critical to their performance. Below is a table summarizing the typical chemical composition for each UNS designation:
| Element | UNS N08031 | UNS R30556 | UNS N06230 | UNS N06686 | UNS R20033 |
| Nickel (Ni) | 30.0-32.0% | 20.0-22.5% | 55.0-65.0% | 57.0-71.0% | 30.0-35.0% |
| Chromium (Cr) | 26.0-28.0% | 22.0-24.0% | 20.0-24.0% | 20.0-23.0% | 31.0-35.0% |
| Molybdenum (Mo) | 6.0-7.0% | 2.5-4.0% | 1.0-2.0% | 15.0-17.0% | 2.0-3.0% |
| Iron (Fe) | 27.0-29.0% | Balance | 3.0% max | 4.0% max | 20.0-25.0% |
| Cobalt (Co) | 0.5% max | 15.0-20.0% | 5.0-15.0% | 2.5% max | 1.0% max |
Mechanical Properties
The mechanical properties of these alloys ensure their suitability for demanding applications. The table below outlines the typical mechanical properties:
| Property | UNS N08031 | UNS R30556 | UNS N06230 | UNS N06686 | UNS R20033 |
| Tensile Strength (ksi) | 100 min | 95 min | 100 min | 110 min | 95 min |
| Yield Strength (0.2% offset, ksi) | 45 min | 45 min | 45 min | 45 min | 45 min |
| Elongation (%) | 35 min | 35 min | 30 min | 40 min | 40 min |
Steel Grade
The alloys covered under ASTM B626 are high-performance materials designed to withstand harsh environments. They are categorized based on their chemical composition and mechanical properties, ensuring they meet the specific needs of various industrial applications.
Application
These nickel-cobalt alloy tubes are widely used in industries such as:
- Chemical Processing: For handling corrosive chemicals and high-temperature processes.
- Oil and Gas: In pipelines and equipment exposed to harsh environments.
- Power Generation: In heat exchangers and boilers where high-temperature resistance is crucial.
- Aerospace: For components that require high strength and corrosion resistance.
Possible Alternative Grades
Depending on the specific requirements of an application, alternative grades may be considered. Some possible alternatives include:
- Inconel 625: Known for its excellent corrosion resistance and high strength.
- Hastelloy C276: Offers outstanding resistance to a wide range of severe environments.
- Monel 400: Suitable for applications requiring good mechanical properties and corrosion resistance.
TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
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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ASTM B626 Alloy 31 Nickel Alloy Welded Pipe N08031 Nickel-Cobalt Alloy Tube For Industry Images
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