Hastelloy B2 Fasteners Supplier
MT.BOLTS manufactures Hastelloy B2 fasteners using premium corrosion-resistant nickel-based alloys. These fasteners are designed for use in highly reducing environments, especially those containing hydrochloric, hydrofluoric, and sulfuric acids. They are commonly used in chemical processing, pharmaceutical production, vacuum systems, and non-oxidizing acid environments.
Our HASTELLOY B2 fasteners have the following specifications:
- Diameter: M3 to M64 | #4 to 2.5″
- Length: 6 mm to 500 mm | 0.25″ to 20″
- Thread Pitch: Metric (Coarse/Fine) | UNC/UNF
- Standards: ASME B18.2.1, ASME B18.3, ASME B18.2.2, DIN/ISO/EN (e.g., DIN 933, DIN 934)
- Material Specifications: ASTM B574 (Hastelloy B2), ASTM B564, ASTM B619, ASTM B622
- Types: Bolts, Screws, Nuts, Washers, Studs
We regularly supply Hastelloy fasteners and bolts made from Hastelloy B2. For your procurement reference, its chemical composition and physical properties are provided below.
| Alloy Grade | UNS Number | Characteristics |
| Hastelloy B2 | N10665 | Outstanding resistance to strong reducing agents such as hydrochloric, hydrobromic, and sulfuric acids; excellent resistance to stress corrosion cracking, pitting, and knife-line attack in non-oxidizing environments |
Hastelloy B2 Fasteners Chemical Composition
| Element | Content (% by weight) |
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 26.0 – 30.0 |
| Iron (Fe) | ≤ 2.0 |
| Cobalt (Co) | ≤ 1.0 |
| Chromium (Cr) | ≤ 1.0 |
| Manganese (Mn) | ≤ 1.0 |
| Carbon (C) | ≤ 0.01 |
| Silicon (Si) | ≤ 0.10 |
| Sulfur (S) | ≤ 0.010 |
| Phosphorus (P) | ≤ 0.04 |
| Aluminum (Al) | ≤ 0.50 |
Hastelloy B2 Fasteners Mechanical Properties
| Property | Value |
| Tensile Strength | ≥ 690 MPa (100 ksi) |
| Yield Strength (0.2% offset) | ≥ 280 MPa (40 ksi) |
| Elongation | ≥ 30% |
| Hardness | ≤ 85 HRB (Brinell ~170 HBW) |
| Density | 9.24 g/cm³ |
Hastelloy B2 Fasteners Types
MT.BOLTS offers a comprehensive range of Hastelloy B2 Fasteners for your selection to meet various application requirements:
Hastelloy B2 Hex Head Screw Bolts
Hastelloy B2 Square Head Bolts
Hastelloy B2 Flange Bolts
Hastelloy B2 Serrated Flange Bolts
Hastelloy B2 Eye bolts
Hastelloy B2 Carriage Bolts
Hastelloy B2 Elevator Bolts
Hastelloy B2 U-Bolts
Hastelloy B2 Anchor Bolts
Hastelloy B2 Expansion Bolt
Hastelloy B2 Lag Bolts
Hastelloy B2 U-Bolts
Hastelloy B2 Hex Head Lag Screws
Hastelloy B2 Shoulder Screws
Hastelloy B2 Socket Cap Screws
Hastelloy B2 Self-Tapping Screws
Hastelloy B2 Hex Nuts
Hastelloy B2 Serrated Flange Nuts
Hastelloy B2 Lock Nuts
Hastelloy B2 Wing Nuts
Hastelloy B2 Coupling Nut
Hastelloy B2 Square Nuts
Hastelloy B2 Acorn Nuts
Hastelloy B2 Wing Nuts
Hastelloy B2 Fully Threaded Rods & Studs
Hastelloy B2 Equal Thread Length Rods & Studs
Hastelloy B2 Unequal Thread Length Rods & Studs
Hastelloy B2 Single End Threaded Studs
Hastelloy B2 Weld Studs
Hastelloy B2 Press-In Captive Studs
Hastelloy B2 Flat Washers
Hastelloy B2 Lock Washers
Hastelloy B2 Curved Washers
Hastelloy B2 Wave Washers
Hastelloy B2 Square Washers
Hastelloy B2 Belleville Washers
Why Choose MT.BOLTS
- Material Diversity
- Standardized Production
- Ample Inventory
- Competitive Pricing
- Low-MOQ Customization
Reasons to Choose Hastelloy B2 Fasteners
- Outstanding Resistance to Reducing Agents
Excellent corrosion resistance in strong reducing media such as hydrochloric acid, hydrogen chloride, and phosphoric acid. - High Purity and Low Carbon Content
Minimizes carbide precipitation during welding, reducing the risk of intergranular corrosion. - Resistance to Stress Corrosion Cracking
Maintains mechanical integrity even in harsh environments where stress corrosion is a concern. - Excellent Fabricability and Weldability
Can be easily machined, formed, and welded without compromising corrosion resistance. - Superior Performance in Non-Oxidizing Environments
Especially suitable for chemical processes where oxidizing contaminants are limited.
Send Us A Message
Application of Hastelloy B2 Fasteners
- Chemical Processing Equipment
Especially in systems handling hydrochloric acid, acetic acid, sulfuric acid (without oxidizers). - Heat Exchangers and Reactors
For reducing conditions in high-temperature environments. - Pickling Equipment and Acid Regeneration Systems
Where exposure to concentrated reducing acids is common. - Pharmaceutical and Agrochemical Industries
For maintaining purity and avoiding contamination from corrosion byproducts. - Pulp & Paper Industry
In bleach plants and acid-based cleaning operations. - Desalination and Brine Systems
Where resistance to non-oxidizing chloride-containing solutions is essential.
FAQ About Hastelloy B2 Fasteners and Bolts
Hastelloy B2 (UNS N10665) is a nickel-molybdenum alloy with high molybdenum content (~28–30%) and very low carbon, silicon, and iron levels. It offers excellent resistance to reducing agents, particularly hydrochloric acid.
They are ideal for strongly reducing environments such as hydrochloric, hydrofluoric, sulfuric, and phosphoric acid systems—especially when oxidizing contaminants are absent or minimal.
No. Hastelloy B2 is not suitable for environments with strong oxidizers (e.g., ferric or cupric salts, nitric acid). In such conditions, it may suffer rapid corrosion.
Yes. They exhibit good weldability, especially with proper heat input and cooling. However, post-weld annealing is often recommended to restore corrosion resistance.
Common industries include chemical processing, pharmaceuticals, pickling operations, pulp and paper, agrochemicals, and any application requiring resistance to strong reducing media.
B2 has superior resistance in reducing acids but lacks versatility in oxidizing conditions. C276 and C22, by contrast, offer broader resistance in mixed acid or oxidizing environments.
Yes. MT.BOLTS provides Hastelloy B2 fasteners in both metric (M3–M64) and inch (#4–2.5") sizes, with various thread pitches (coarse/fine).
Related Products
17-4 PH Stainless Steel Fasteners
17-4 PH Stainless Steel Fasteners Supplier MT.BOLTS manufactures 17-4 PH stainless steel fasteners using high-quality precipitation-hardening stainless steel. These fasteners
18-8 stainless steel fasteners
18-8 Stainless Steel Fasteners Supplier MT.BOLTS manufactures 18-8 stainless steel fasteners using high-quality austenitic stainless steel grades such as 304,
ASTM A307 Bolts
ASTM A307 Bolts Supplier MT.BOLTS manufactures ASTM A307 carbon steel bolts using high-quality low-carbon steel materials. These bolts offer reliable