(UNS N10665) is a nickel-molybdenum alloy known for its excellent resistance to a wide range of aggressive environments, particularly in reducing acids such as hydrochloric acid and sulfuric acid. It is a member of the Hastelloy family and is widely used in industries that require strong resistance to corrosion, especially in applications that involve highly corrosive, reducing environments.
Hastelloy UNS N10665 is also known as Hastelloy B-2. It is a high-performance, nickel-molybdenum alloy designed primarily for applications that require excellent resistance to reducing acids, especially hydrochloric acid and sulfuric acid, as well as resistance to chloride-induced corrosion. Its outstanding properties make it ideal for chemical processing and other industries where exposure to aggressive, corrosive environments is common.

Key Features
Corrosion Resistance:
- Outstanding resistance to hydrochloric acid in all concentrations and temperatures.
- Resists stress corrosion cracking, pitting, and crevice corrosion.
- Performs well in environments containing acetic, sulfuric, and phosphoric acids.
High Molybdenum Content:
- Molybdenum is the primary alloying element that enhances corrosion resistance in reducing environments.
Limitations:
- Not recommended for use in strongly oxidizing media.
- Care must be taken to avoid exposure to oxidizing agents such as ferric or cupric salts, as they can cause rapid corrosion.
Temperature Range:
- Excellent thermal stability and can be used in temperatures up to about 1000°F (537°C).
- It can withstand thermal cycling but must avoid prolonged exposure to extreme high temperatures, as it can lead to loss of ductility.
Applications
Due to its superior corrosion resistance, Hastelloy B-2 is commonly used in industries dealing with:
- Chemical processing equipment, such as reactors, heat exchangers, and vessels.
- Piping systems for highly corrosive chemicals.
- Components for pickling systems.
- Pollution control (scrubbers, ducts, and stack liners).




Hastelloy grades: Hastelloy C276, Hastelloy C22, Hastelloy C-2000, Hastelloy C-4, Hastelloy C, Hastelloy B, Hastelloy B-2, Hastelloy B-3, Hastelloy X, Hastelloy G-30, Hastelloy G-35, etc.
Hastelloy | ||||||||||||
Grade | Ni | Cr | Fe | Mo | W | Co | C | Mn | Si | S | P | Other |
C-276 | Rom | 15-16.5 | 4-7 | 15-17 | 3-4.5 | 2.5 | 0.01 | 1 | 0.08 | 0.001 | 0.015 | v0.1-0.3 |
C-22 | 56-59 | 20-22.5 | 2-6 | 12.5-14.5 | 2.5-3.5 | 2.5 | 0.015 | 0.5 | 0.08 | 0.02 | v0.35 | |
C-2000 | Rom | 22-24 | 3 | 15-17 | 2 | 0..01 | 0.5 | 0.06 | 0.01 | 0.025 | Al0.5 Cu1.6 | |
B-2 | Rom | 0.4-0.7 | 1.6-2 | 26-30 | 1 | 0.01 | 1 | 0.08 | 0.01 | 0.02 | Cu0.5 | |
B-3 | 64 | 1-3 | 1-3 | 27-32 | 3 | 3 | 0.01 | 3 | 0.1 | 0.01 | 0.03 | v0.2 Al0.5 Ti0.2 Cu0.2 |
G-30 | Rom | 28-31.5 | 13-17 | 4-6 | 1.5-4 | ≤5 | 0..03 | ≤2 | ≤1 | ≤0.02 | ≤0.04 | Nb/Ta0.3-1.5 Cu1-2.4 |
X | Rom | 20.5-23.5 | 17-20 | 8-10 | 0.2-1 | 0.5-2.5 | 0.05-0.15 | 1 | 1 | 0.015 | 0.025 | Al0.5 Ti0.15 B0.005 |
C-4 | Rom | 14-18 | 3 | 14-17 | 2 | 0.015 | 1 | 0.08 | 0.7 | 0.04 | Ti0.7 | |
G-35 | 8-10 | 5 | 33 | 2 | 0.03 | 2-3 | 1.5 | 1 | 2 | 0.02 | Cu0.04 | |
C | Rom | 14.5-17.5 | 4-7 | 15-17 | 3-4.5 | 0.03 | 1 | 0.03 | 0.04 |
Hastelloy | Density g/cm3 | Melting point ºC | Elongation A5 % | Tensile Strength Rm N/mm2 | Yield Strength RP0.2N/mm2 |
C-276 | 8.9 | 1325-1370ºC | 62 | 758 | 363 |
C-22 | 8.9 | 1325-1370ºC | 40 | 690 | 283 |
C-2000 | 8.5 | 1399ºC 2550°F | 45 | 690 | 283 |
B-2 | 9.2 | 1330-1380ºC | 40 | 745 | 325 |
B-3 | 9.22 | 1370-1418ºC | 40 | 760 | 350 |
G-30 | 8.22 | 1399ºC 2550°F | 62 | 524 | 200 |
X | 8.3 | 1260-1355ºC | 30 | 690 | / |
C-4 | 8.64 | 399°C 2550°F | 40 | 690 | 280 |
G-35 | 8.22 | 1370-1400ºC | / | / | / |
C | 8.94 | 1330-1380 ºC | 40 | 690 | 310 |
1. What is Hastelloy?
Hastelloy is a high-performance corrosion-resistant alloy widely used in industries such as chemical processing, aerospace, marine, and energy, especially in extreme temperature and corrosive environments. Its main components include nickel, molybdenum, chromium, and other metal elements.
2. What types of Hastelloy alloys do you sell?
We sell a variety of Hastelloy alloys, including but not limited to:
- Hastelloy C-276
- Hastelloy C-22
- Hastelloy B-2
- Hastelloy X
- Hastelloy G-30 Each alloy has different corrosion resistance properties and high-temperature characteristics, suitable for various industrial applications.
3. How do I choose the right Hastelloy material for my needs?
When selecting Hastelloy materials, consider the following factors:
- Operating Environment: Including temperature, corrosive media, oxidation conditions, etc.
- Corrosion Resistance: Different Hastelloy alloys have varying resistance to different types of corrosion (acidic, chlorides, oxidation, etc.).
- Mechanical Properties: Including tensile strength, hardness, etc., depending on the specific workload of the application.
If you're unsure about which alloy to choose, our technical support team can assist you with professional recommendations based on your requirements.
4. What specifications are available for your Hastelloy products?
We offer a wide range of Hastelloy products, including plates, pipes, bars, wires, and customized products. Specifications include various thicknesses, diameters, lengths, etc., to meet diverse customer needs.
5. What is the delivery time for Hastelloy products?
For standard stock items, the delivery time is typically 3-7 working days. For customized or specially processed products, delivery time may vary and is generally 2-4 weeks. Specific delivery times can be confirmed based on order quantities and production schedules.
6. How do you guarantee the quality of your Hastelloy products?
All of our Hastelloy products are sourced from reliable manufacturers and strictly adhere to international quality standards. Each batch of materials comes with detailed quality inspection reports and material certificates to ensure that the products meet performance and quality standards.
7. Do you offer technical support and consulting services?
Yes, we provide free technical support services. Our engineering team can assist with material selection, processing techniques, performance testing, and more. Whether it's product selection or engineering design, we can provide professional consulting services.
8. How can I get a quote?
You can request a quote through the following methods:
- Submit a quote request form on our website
- Call our sales hotline
- Contact us via email Please provide details such as the alloy type, specifications, quantity, and delivery location to receive an accurate quote.
9. Do you support international shipping?
Yes, we offer worldwide shipping. Our experienced logistics team can assist with various international shipping issues, including transportation options, customs handling, and destination requirements.
10. What payment methods do you accept?
We accept various payment methods, including bank transfers, credit card payments, PayPal, and more. The specific payment method can be confirmed based on the order amount and customer preferences.
11. Do you offer returns or exchanges?
Due to the customized or specialty nature of Hastelloy materials, our return and exchange policy is strict. Standard stock products can be returned or exchanged if they are unused and unprocessed. Please confirm the return/exchange conditions and process with our sales team before placing an order.
12. What certifications or documentation do you provide?
We can provide the following certifications and documents:
- Material inspection reports
- Material certificates
- Compliance certificates (e.g., ISO 9001 certification)
- Other certification documents as required by the customer
13. Do you offer processing or customization services?
Yes, we provide customized processing services for Hastelloy alloys, including cutting, welding, precision machining, and more. Whether it's standard dimensions or special requirements, we can process the materials to meet your needs.
14. How can I contact you for more information?
You can contact us through the following methods:
Online support: Visit our website for live chatAddress: 300 Meters North of Liaoniu Road and Xindong Ring Road, Liaocheng High-Tech Zone, Liaocheng, Shandong, China
We look forward to providing you with high-quality products and services!
If you have any other questions, feel free to contact us, and we will do our best to assist you!