Nickel Alloys Inconel 625 U-Bolts and J-Bolts
The Inconel 625 U-Bolt and J-Bolt are specialized, high-performance fasteners designed for securing piping systems to structural supports or anchoring components to foundations. U-Bolts are curved in a 'U' shape and are used to clamp pipes securely, while J-Bolts are bent in a 'J' shape and typically function as anchor bolts or restraining components. Manufactured from the robust nickel-chromium-molybdenum superalloy, UNS N06625 (Alloy 625), these fasteners offer a combination of high mechanical strength and outstanding resistance to extreme environments. The alloy's strengthening elements, molybdenum and niobium, ensure the fasteners maintain their load-bearing capabilities across a wide temperature range, resisting creep and fatigue. Crucially, Inconel 625 provides near-immunity to chloride ion stress corrosion cracking (SCC) and exceptional resistance to pitting and crevice corrosion, making these bolts essential for pipe supports on offshore platforms, chemical processing plants, and marine infrastructure. We manufacture and supply these specialized bolts in compliance with standards such as ASTM F2281 and ASTM B446.
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Chemical Composition (UNS N06625 / Alloy 625)
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 58.0 Min |
| Chromium (Cr) | 20.0 to 23.0 |
| Molybdenum (Mo) | 8.0 to 10.0 |
| Niobium + Tantalum (Nb + Ta) | 3.15 to 4.15 |
| Iron (Fe) | 5.0 Max |
| Carbon (C) | 0.10 Max |
| Cobalt (Co) | 1.0 Max |
| Aluminum (Al) | 0.40 Max |
| Titanium (Ti) | 0.40 Max |
| Silicon (Si) | 0.50 Max |
| Manganese (Mn) | 0.50 Max |
| Phosphorus (P) | 0.015 Max |
| Sulfur (S) | 0.015 Max |
Note: Composition according to specifications like ASTM B446 ASME SB446.
Mechanical Properties (UNS N06625 / Alloy 625)
| Property (Annealed) | Minimum Value |
|---|---|
| Ultimate Tensile Strength (MPa) | 930 |
| Yield Strength (0.2% Proof) (MPa) | 517 |
| Elongation (%) | 42.5 Min |
| Density (g cm⁻³) | 8.44 Typical |
| Melting Range (°C) | 1290 to 1350 |
| High-Temperature Limit (°C) | 982 |
Values are typical and may vary based on specific product form, size, and heat treatment.