Hastelloy B3 Fasteners (UNS N10675)
Ananka Fasteners is a premier manufacturer and supplier of specialized Hastelloy B3 Fasteners (W.Nr. 2.4600). Manufactured in accordance with Haynes International Standards, Alloy B3 offers outstanding resistance to hydrochloric acid and other strongly reducing media while delivering vastly superior thermal stability compared to B2.
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■ Hastelloy Alloy Selection Grid
To assist procurement managers and engineers, use our technical grid below to compare the performance profiles of our primary Hastelloy grades. Click the specific grade for its dedicated specification page.
| Grade / Anchor Link | Yield Strength (Min) | Key Chemical Resistance | Primary Application |
|---|---|---|---|
| Hastelloy C276 Fasteners | 41 ksi (283 MPa) | Wet chlorine, hypochlorite, sulfur compounds | Flue Gas Desulfurization (FGD), Chemical Processing |
| Hastelloy C22 Fasteners | 45 ksi (310 MPa) | Outstanding overall resistance to localized corrosion | Pharmaceuticals, Fine Chemicals |
| Hastelloy B2 Fasteners | 51 ksi (350 MPa) | Pure sulfuric, phosphoric & hydrochloric acids | Reducing environments, Acid Production |
| Hastelloy B3 Fasteners | 51 ksi (350 MPa) | Hydrochloric acid at all temps/concentrations | High-temperature acidic processes (improved thermal stability) |
■ Complete Range of Hastelloy B3 Fasteners
We manufacture a comprehensive range of Alloy B3 fasteners engineered to survive severe reducing chemical environments and extreme thermal fluctuations.
| Bolts & Screws | Nuts & Washers | Studs & Rods |
|---|---|---|
| Hex Bolts / Heavy Hex Bolts | Hex Nuts / Heavy Hex Nuts | Fully Threaded Studs |
| Socket Head Cap Screws | Flange Nuts / Lock Nuts | Double Ended Studs |
| Flange Bolts / 12-Point Bolts | Flat Washers / Spring Washers | Custom CNC Machined Studs |
■ Mechanical Properties & Yield Strength
Hastelloy B3 Fasteners maintain excellent mechanical properties while offering superior resistance to pitting, crevice corrosion, and heat-affected zone attack compared to predecessor alloys. Below are the standard mechanical properties:
| Tensile Strength (Min) | Yield Strength 0.2% Offset (Min) | Elongation (%) | Density |
|---|---|---|---|
| 110 ksi (760 MPa) | 51 ksi (350 MPa) | 40% Min | 9.22 g/cm³ |
■ Acidic Processes & Chemical Synthesis Applications
Crucial Engineering Note: Like Alloy B2, Hastelloy B3 Fasteners are specifically designed for reducing environments. They are not recommended for use in the presence of ferric or cupric salts, which rapidly induce premature failure in oxidizing media.
- Chemical Synthesis: Fasteners for reactors and piping used in the manufacturing of herbicides, insecticides, and fine chemicals.
- Acid Production: Equipment subjected to pure hydrochloric acid, hydrobromic acid, and sulfuric acid at high temperatures.
- Pharmaceutical Processing: Specialized structural joints and flanges where preventing acid-induced cracking is paramount.
- High-Temperature Fabrication: Ideal for complex assemblies where fasteners experience transient thermal cycles during welding.
■ Quality Assurance & MTC Downloads
As a primary manufacturer based in Mumbai, our quality control goes beyond standard chemical analysis. We conduct rigorous first-hand testing on all Hastelloy B3 Fasteners to ensure they meet the stringent safety requirements of EPC contractors and chemical process engineers.
- Ultrasonic Testing (UT): Internal flaw detection performed on raw billets prior to machining.
- Destructive Testing: In-house tensile, yield, and elongation testing to verify structural integrity.
- PMI (Positive Material Identification): 100% optical emission spectroscopy scanning prior to dispatch to guarantee precise molybdenum and alloy chemistry.
📄 Download Sample EN 10204:3.1 MTC (PDF)