Hastelloy C-4/NS335/NS3305/N06455/2.4610/NiMo16Cr16Ti Bolt Standard for Performance and Reliability in Extreme Environments
Hastelloy C-4 (UNS N06455, W.Nr. 2.4610, NS335, NS3305) is a nickel-molybdenum-chromium alloy known for its exceptional corrosion resistance, particularly in strong oxidizing and reducing environments. This alloy is highly resistant to stress corrosion cracking, pitting, and crevice corrosion, making it ideal for harsh chemical processing industries.
Bolts made from Hastelloy C-4 are widely used in industries such as chemical processing, aerospace, and marine applications due to their superior mechanical strength and high-temperature stability. They maintain excellent corrosion resistance in acidic environments, including hydrochloric, sulfuric, and phosphoric acids. The presence of titanium enhances thermal stability, preventing grain boundary precipitation and ensuring long-term durability in extreme conditions.
| Chemical Composition Wt.% | % | Fe | Cr | Cu | Ni | Ti | C | Mn | Si | Mo | Co |
| Min | | 14 | | Bal. |
| | | | 14 | |
| Max | 3 | 18 | 0.07 | Bal. | 0.7 | 0.15 | 1 | 0.08 | 17 | 2 |
| Physical Constants | Density(g/cm³) | 8.89 |
| Melting Range(℃) | 1325-1370 |
| AlloyState | Recovery Strength Reduction (RP0.2) N/mm2 | Tensile Strength Rm N/mm2) | Elongation A5% |
| Solid Solution State | 280 | 650 | 40 |
Trade Code
| Category/Type | hex bolts |
| Head type | outer hexagonal |
| Thread tolerance | 6G |
| Material | HastelloyC-4 |
| Performance level | 8.8 |
| Thread specification | M6~M100 |
| Head side length | 10-120(mm) |
| Head thickness | 6.6-60(mm) |
| Total length | 30~800(mm) |
Hastelloy C-4 (also known as NS335, NS3305, N06455, 2.4610, and NiMo16Cr16Ti) bolts offer exceptional corrosion resistance and high-temperature strength, making them ideal for extreme environments. Here are their key features:
Key Features of Hastelloy C-4 Bolts
1.Superior Corrosion Resistance
- Excellent resistance to oxidizing and reducing environments.
- Strong resistance to localized corrosion (pitting, crevice, and stress corrosion cracking).
- Performs well in acidic environments, including sulfuric, hydrochloric, and phosphoric acids.
2.High-Temperature Stability
- Maintains mechanical integrity up to 1038°C (1900°F).
- Resistant to grain boundary precipitation at elevated temperatures.
- Suitable for high-temperature chemical processing applications.
3.Exceptional Strength & Durability
- High mechanical strength and toughness.
- Maintains structural integrity under extreme conditions.
4.Composition & Structure
- Nickel-based alloy with approximately 16% Molybdenum, 16% Chromium, and Titanium additions.
- Low carbon content minimizes carbide precipitation during welding.
5.Excellent Weldability & Fabrication
- Can be welded using standard welding techniques without post-weld heat treatment.
- Easily machined compared to other Hastelloy grades
Applications:
Hastelloy C-4 (UNS N06455, W.Nr. 2.4610, NS335, NS3305, NiMo16Cr16Ti) bolts are highly corrosion-resistant fasteners used in extreme environments. Their primary applications include:
1. Chemical Processing Industry
- Used in reactors, heat exchangers, piping, and vessels where exposure to strong oxidizing and reducing agents occurs.
- Resistant to hydrochloric acid, sulfuric acid, phosphoric acid, and nitric acid.
- Suitable for chlorinated organic compounds and acidic gas environments.
2. Aerospace and Aviation
- Ideal for jet engine components and exhaust systems exposed to high temperatures and aggressive chemical exposure.
- Used in spacecraft manufacturing where resistance to oxidation and thermal stability is critical.
3. Marine and Offshore Industry
- Employed in subsea equipment, offshore platforms, and shipbuilding due to excellent resistance to seawater and brine environments.
- Corrosion-resistant against pitting and crevice corrosion in saline conditions.
4. Power Plants
- Used in nuclear and thermal power plants for flue gas scrubbers, heat exchangers, and boiler components.
- Withstands high-temperature oxidation and stress corrosion cracking.
5. Pharmaceutical and Food Processing
- Ensures hygiene and contamination prevention in food-grade applications.
- Resistant to sterilization chemicals and high-purity water systems.
6. Pollution Control and Waste Treatment
- Used in flue gas desulfurization (FGD) systems, waste incineration, and acid recycling units.
- Effective against sulfuric acid mist and aggressive industrial waste streams.
Summary:
Hastelloy C-4 bolts offer outstanding weldability and formability, making them suitable for critical fastening applications in reactors, heat exchangers, and pressure vessels. These fasteners retain their integrity even under fluctuating thermal cycles and aggressive chemical exposures. Their high nickel and molybdenum content enhances resistance to localized attack, making them a reliable choice for corrosive environments.
Overall, Hastelloy C-4 bolts provide superior longevity, minimal maintenance, and excellent mechanical properties, making them a preferred choice for demanding industrial applications.
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