- Have any problems?
- sales@anankafasteners.com
HASTELLOY B3 FASTENERS | ULTIMATE GUIDE & MANUFACTURER
Ananka Fasteners is a premier manufacturer and supplier of high-quality Hastelloy B3 Fasteners (UNS N10675 / W.Nr. 2.4600). Engineered as a solid-solution-strengthened, face-centered cubic nickel-molybdenum alloy, B3 offers unmatched resistance to highly reducing environments—most notably boiling hydrochloric and sulfuric acids. It fundamentally resolves the thermal instability issues of older B-series alloys, providing vastly superior structural integrity and ductility during high-temperature fabrication and service.
■ Complete Range of Hastelloy B3 Fasteners
As a master manufacturer, we produce a comprehensive range of Alloy B3 fasteners spanning from standard M3 hardware up to massive M100 structural ties and 2-inch imperial heavy bolts.
| Bolts & Screws | Nuts & Washers | Studs & Rods |
|---|---|---|
| Standard Hex Bolts / Heavy Hex Bolts | Standard Hex Nuts (DIN 934) | Fully Threaded Studs (DIN 976) |
| Socket Head Cap Screws | Flat Washers (DIN 125) | Double Ended Studs |
| Anchor Bolts / U-Bolts / T-Bolts | Spring Washers | Threaded Rods / Tie Rods |
| Countersunk Screws / Flange Bolts | Heavy Hex Nuts | Custom Machined Studs |
■ Standard Product Pages
Explore our dedicated standard pages for specific fastener categories to view detailed dimensions, availability, and specific technical data:
- Hastelloy B3 Bolts: Comprehensive range of heavy hex, socket cap, and cold/hot forged configurations.
- Hastelloy B3 Nuts: View our dedicated page for standard hex, heavy hex, and precision-machined nuts.
- Hastelloy B3 Studs: Fully threaded and double-ended studs for highly reducing high-pressure vessel joints.
- Hastelloy B3 Washers: High-performance plain and spring washers for secure fastening in aggressive chemical environments.
■ Hastelloy B3 Material Specifications
| Material Equivalent Grades | UNS N10675 | W.Nr. 2.4600 | Alloy B3 | NiMo30Cr |
|---|---|
| Standard Specifications | ASTM F468 / ASME SF468 (Nonferrous Bolts & Studs) ASTM B335 (Rod & Bar Stock) |
| Size Range | Metric: M3 to M100 | Imperial: 3/16" to 2" |
| Thread Types | UNC, UNF, Metric Coarse, Metric Fine (Rolled or Cut) |
| Dimensional Standards | DIN (931/933/912/934/976), ISO, ASME B18.2.1 |
■ Chemical Composition of Alloy B3
| Ni (Nickel) | Mo (Molybdenum) | Cr (Chromium) | Fe (Iron) | W (Tungsten) | Mn (Manganese) | C (Carbon) |
|---|---|---|---|---|---|---|
| 65.0% Min (Bal) | 27.0 - 32.0% | 1.0 - 3.0% | 1.0 - 3.0% | 3.0% Max | 3.0% Max | 0.01% Max |
■ Mechanical & Physical Properties
| Tensile Strength (Min) | Yield Strength 0.2% Offset (Min) | Elongation (%) | Density | Melting Range |
|---|---|---|---|---|
| 760 MPa (110 ksi) | 350 MPa (51 ksi) | 40% Min | 9.22 g/cm³ | 1370 - 1418°C |
■ Installation Tribology & Corrosion Profile
Installation Mechanics & Galling: Because Hastelloy B3 is highly ductile and features extremely low thermal conductivity, it is severely prone to cold-welding and thread galling. The use of high-temperature, non-copper anti-seize lubricants (such as advanced nickel-based pastes) is absolutely mandatory to prevent joint seizure. Torque values must be mathematically reduced to account for the lubricated friction factor.
Corrosion Vulnerability Warning: Hastelloy B3 is exclusively designed for reducing environments. It is highly susceptible to rapid, runaway corrosion in the presence of strong oxidizing agents (like nitric acid) or oxidizing salts (such as ferric or cupric chloride). Standard copper-based anti-seize must never be used, as cupric salts will immediately induce severe localized corrosion.
■ Key Characteristics & Industrial Applications
Hastelloy B3 exhibits unparalleled resistance to pitting, stress corrosion cracking (SCC), and uniform dissolution in severe chemical processing environments.
- Chemical Processing (CPI): Permanent structural containment for reactors and piping synthesizing complex organics, including MDI and TDI polyurethanes, utilizing highly concentrated hydrochloric, sulfuric, and phosphoric acids.
- Pharmaceutical Production: Securing advanced API synthesis reactors where flawless microstructural cleanliness is required to guarantee zero metallic contamination.
- Thermally Cycled Environments: Pressure boundary joints that undergo rapid heating and cooling cycles, where B3's enhanced thermal stability guarantees the fasteners will not suddenly embrittle.