Bolts are the most fundamental and critical fasteners in mechanical equipment, pressure vessels, pipe flanges, and structural connections. The nickel alloy bolts supplied by us are manufactured from high-quality nickel-based alloy bars through multiple precision processes including hot forging/cold heading, thread rolling/chasing, solution heat treatment, and surface treatment. Featuring high strength, excellent corrosion resistance, good fatigue resistance, and stable high-temperature performance, they are specifically designed for critical connections under demanding conditions such as offshore engineering, petrochemical processing, and nuclear power generation.
Supply Range
Nominal Diameter (d): M6 – M100 (1/4 inch – 4 inches)
Length (L): 10mm – 6000mm (customized as per customer requirements)
Thread Specification: Coarse Thread (UNC), Fine Thread (UNF), Metric Thread
Thread Accuracy: 6g (common for external threads), 4h/6h precision grades available
Head Type: Hex Head, Square Head, T-Head, Eye Bolt
Bolt Type: Full Thread Bolt, Partial Thread Bolt
Strength Grade: Determined by material and heat treatment process, meeting ASTM F468 requirements
Surface Condition: Pickled, Passivated, Polished optional
Quality Assurance
Tailan Metal implements full-process quality control for nickel alloy bolts, ensuring every product shipped can withstand scrutiny:
- Forming Process Monitoring
Cold Heading/Hot Forging Parameter Control: Ensuring forming temperature, pressure within specification range
Visual Inspection: Inspecting head forming quality, no cracks, folds, or other defects
- 2. Heat Treatment Verification
Intergranular Corrosion Testing: Verifying heat treatment effectiveness per ASTM A262 standard
- 3. Thread Processing Inspection
Thread Accuracy: Go/No-Go gauge inspection using thread gauges
Thread Surface: Visual inspection, no burrs, no damage
- 4. Mechanical Property Testing
Tensile Testing: Sampling testing per batch
Hardness Testing: Batch sampling testing
- 5. Dimensional and Appearance Inspection
Overall Dimensions: Measuring critical dimensions using calipers, micrometers
Surface Quality: Visual inspection, no cracks, pits, rust
- 6. Non-Destructive Testing
Penetrant Testing (PT): Surface inspection for critical service bolts
Ultrasonic Testing (UT): Internal defect inspection for large diameter bolts
