Hastelloy B-2 (UNS N10665) is a nickel-molybdenum alloy with 26–30% molybdenum, giving excellent resistance to reducing media such as hydrochloric and sulphuric acid. Low carbon and silicon keep the weldment free from intergranular attack, making it a specialist material for HCl and acetic acid plant.
As a manufacturer and global exporter of special alloys since 2012, Shanghai Hangbo Alloy Group Co., Ltd. supplies Hastelloy B-2 as round bars (φ2–600 mm, up to 12 m), plates & sheets (0.5–100 mm thick, up to 2500 mm wide), seamless tubes & pipes (φ6–630 mm OD, 0.5–40 mm wall), forgings & rolled rings (up to 7500 kg, 3500 mm OD), flanges & pipe fittings (Class 150–2500, DN15–DN1200) — all with EN 10204 3.1 certified material test reports.
Hastelloy B-2 Chemical Composition (wt%)
| Element | Content (wt%) | Element | Content (wt%) |
|---|---|---|---|
| Ni (镍) | Balance | C (碳) | ≤ 0.02 |
| Mo (钼) | 26.0–30.0 | Si (硅) | ≤ 0.10 |
| Fe (铁) | ≤ 2.0 | Mn (锰) | ≤ 1.00 |
| Cr (铬) | ≤ 1.0 | P (磷) | ≤ 0.040 |
| Co (钴) | ≤ 1.00 | S (硫) | ≤ 0.030 |
Hastelloy B-2 Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength (Rm) | ≥ 760 MPa |
| Yield strength (Rp0.2) | ≥ 350 MPa |
| Elongation (A) | ≥ 40 % |
| Hardness | ≤ 200 HB |
| Density | 9.22 g/cm³ |
| Melting range | 1330–1380 °C |
| Thermal conductivity | 11.0 W/m·K |
| Young's modulus | 217 GPa |
| Max service temperature | 1000 °C |
Key Advantages
- Excellent across all hydrochloric acid concentrations and temperatures
- Resists non-oxidising acids — sulphuric, phosphoric, acetic
- Immune to chloride stress-corrosion cracking; resists pitting
- Caution: not suitable where oxidising ions (Fe³⁺, Cu²⁺) are present
Relevant Standards
- ASTM B335
- ASTM B333
- ASTM B622
- ASTM B564
- UNS N10665
Typical Applications
- Hydrochloric acid production, storage and transfer equipment
- Acetic acid and acetic anhydride plant
- Alkylation and catalyst recovery systems
- Sulphuric acid recovery and concentration
- Agrochemical and dye intermediate reactors
Why Buy from Hangbo Alloy?
- Factory-direct manufacturer — founded 2012, headquartered in Shanghai Qingpu
- Full product range — bar, plate, sheet, strip, tube, forging, welding wire, flanges and machined parts
- Certified quality — ISO 9001:2015, GB/T 19001-2016, GJB 9001C-2017, EN 10204 3.1 mill test certificates with third-party inspection (SGS / BV / TUV) available on request
- Complete mill documentation — chemical analysis, mechanical test, ultrasonic test (UT), hardness and grain-size reports with every shipment
Contact Us — Shanghai Hangbo Alloy Group Co., Ltd.
Shanghai Hangbo Alloy Group Co., Ltd.
📍 No. 388 Songhuang Road, Qingpu District, Shanghai, China
📞 Tel / WhatsApp: +86 15618279078
✉️ Email: demi@nickel-alloy.com
🕒 Available 24 hours a day, 7 days a week — enquiries answered around the clock.
Send your drawing or enquiry (grade, form, size, quantity, standard) for a same-day quotation.
Frequently asked questions
Why can't Hastelloy B-2 be used in hydrochloric acid containing oxidising impurities?
B-2 relies on a molybdenum-rich film that is stable only in reducing environments. When Fe³⁺, Cu²⁺, dissolved oxygen or nitric acid are present, the corrosion potential shifts and the film breaks down, sharply increasing the corrosion rate. Switch to chromium-bearing C-22 or C-2000 in that case.
What is the difference between B-2 and B-3?
B-3 (UNS N10675) has a tuned chemistry with small chromium addition and controlled iron, greatly improving thermal stability. It is far less prone than B-2 to precipitating Ni-Mo intermetallic phases during mid-temperature (600–800 °C) processing, so welding and hot forming are safer and properties more consistent. B-3 is preferred for new projects.
What forms and sizes are available?
We supply Hastelloy B-2 as round bars (φ2–600 mm, up to 12 m), plates & sheets (0.5–100 mm thick, up to 2500 mm wide), seamless tubes & pipes (φ6–630 mm OD, 0.5–40 mm wall), forgings & rolled rings (up to 7500 kg, 3500 mm OD), flanges & pipe fittings (Class 150–2500, DN15–DN1200). Custom lengths, tolerances and machining to drawing are available on request.
What is the MOQ and lead time?
MOQ is flexible — trial orders from a single piece are welcome. Stock sizes ship in 3–7 days; custom forgings and machined parts typically 15–35 days depending on quantity and process.
Can you provide third-party inspection and shipping to my port?
Yes. SGS / BV / TUV or your nominated inspector can witness all tests before shipment. Full export documentation is provided, and we ship worldwide by sea or air on FOB, CIF or DDP terms.