Recommend Products
Name: Fujian Monel 400 Double End Stud Material: Monel 400 Standard: ASME B18.2.1 Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: Resistant to hydrofluoric acidQS Fastener: Monel 400 Double End Stud
Name: Inconel 625 Double End Stud Material: Inconel 625 Standard: ASME B18.2.1 Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: High Yield Strength, Durable Strength and Corrosion ResistanceQS Fastener: Inconel 625 Double End Stud
Name: Xiamen Inconel 600 High Strength Fastener Material: Inconel 600 Standard: ASME Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: High Yield Strength, Durable Strength and Corrosion ResistanceQS Fastener: Inconel 600 High Strength Fastener
Name: Inconel 600 Stud Bolt Putian Material: Inconel 600 Standard: ASME B18.2.1 Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: High Yield Strength, Durable Strength and Corrosion ResistanceQS Fastener: Inconel 600 Stud Bolt
X6NiCrTiMoVB25-15-2 Stud Bolt
QS Fastener: X6NiCrTiMoVB25-15-2 Stud Bolt
Name: Nickel-based Alloy Double End Stud
Standard: EN10269
Material: X6NiCrTiMoVB25-15-2
Size: 1-7/8 inch
Lenght: 420 mm
Temperature: 650-700℃
Surface: Natural color
Standard: EN10269
Material: X6NiCrTiMoVB25-15-2
Size: 1-7/8 inch
Lenght: 420 mm
Temperature: 650-700℃
Surface: Natural color
Quantity
X6NiCrTiMoVB25-15-2 Stud Bolt – EN 10269 nickel-base alloy double-ended stud purpose-built for 650-700 °C extreme-duty service.
1-7/8 in. large diameter, 420 mm extra-long design, solution-treated for fine grain, relaxation- and creep-resistant; natural-finish surface eliminates coating-spallation risk. First-choice fastener for nuclear power, ultra-super-critical turbine casings and petrochemical-reformer flanges: tighten once, zero maintenance for life.
1-7/8 in. large diameter, 420 mm extra-long design, solution-treated for fine grain, relaxation- and creep-resistant; natural-finish surface eliminates coating-spallation risk. First-choice fastener for nuclear power, ultra-super-critical turbine casings and petrochemical-reformer flanges: tighten once, zero maintenance for life.
How do we cut the scrap rate during installation?
For precipitation-hardenable nickel-base studs such as the X6NiCrTiMoVB25-15-2 Stud Bolt, three principles at 650-700 °C will lift first-time-fit yield from 85 % to ≥ 98 %: “prevent galling, prevent overload, prevent stress-corrosion cracking”. Key points:
For precipitation-hardenable nickel-base studs such as the X6NiCrTiMoVB25-15-2 Stud Bolt, three principles at 650-700 °C will lift first-time-fit yield from 85 % to ≥ 98 %: “prevent galling, prevent overload, prevent stress-corrosion cracking”. Key points:
1. Incoming re-inspection
- PMI-check every X6NiCrTiMoVB25-15-2 Stud Bolt: Co ≤ 0.1 %, Nb ≤ 0.2 % to avoid radiation activation and σ-phase embrittlement.
- Spot-review 300 °C tensile and 650 °C 100 h creep reports: actual values ≥ 90 % of standard.
- PMI-check every X6NiCrTiMoVB25-15-2 Stud Bolt: Co ≤ 0.1 %, Nb ≤ 0.2 % to avoid radiation activation and σ-phase embrittlement.
- Spot-review 300 °C tensile and 650 °C 100 h creep reports: actual values ≥ 90 % of standard.
2. “Zero-damage” thread introduction
- Keep PP thread protectors on X6NiCrTiMoVB25-15-2 Stud Bolt during transport and rigging; any field re-machining demands TiN-coated tools, ≤ 80 rpm, flood coolant to avoid work-hardening.
- Keep PP thread protectors on X6NiCrTiMoVB25-15-2 Stud Bolt during transport and rigging; any field re-machining demands TiN-coated tools, ≤ 80 rpm, flood coolant to avoid work-hardening.
- Gauge both ends 100 % with 6H go/no-go; dress burrs only with 400-grit Al₂O₃ oil-stone, stroking with the thread—power wire brushes forbidden to stop iron pick-up and subsequent intergranular attack.
3. Anti-gall lubrication strategy
- Conventional MoS₂ decomposes above 650 °C; coat X6NiCrTiMoVB25-15-2 Stud Bolt with nickel-base anti-seize (≈ 30 % Ni powder + graphite, e.g. Loctite 8023), film thickness 10-15 µm.
- Conventional MoS₂ decomposes above 650 °C; coat X6NiCrTiMoVB25-15-2 Stud Bolt with nickel-base anti-seize (≈ 30 % Ni powder + graphite, e.g. Loctite 8023), film thickness 10-15 µm.
- Pre-clean with chlorine-free, silicone-free, phosphorus-free solvent; after coating oven-dry 10 min at 60 °C to drive off solvent and avoid high-temperature porosity.
4. Torque-plus-angle dual control
- Snug X6NiCrTiMoVB25-15-2 Stud Bolt to 20 % target torque with a manual wrench to remove clearance, then cross-tighten in three steps (30 %-70 %-100 %); final 90° ± 5° angle compensates for thermal growth.
- Snug X6NiCrTiMoVB25-15-2 Stud Bolt to 20 % target torque with a manual wrench to remove clearance, then cross-tighten in three steps (30 %-70 %-100 %); final 90° ± 5° angle compensates for thermal growth.
- Target preload = 65 % of 0.2 % proof strength (Rp0.2 ≈ 420 MPa); for M42 × 4.5 this equals ~2 800 N·m, repeatability ±3 %.
5. Temperature and alignment management
- Temperature difference between X6NiCrTiMoVB25-15-2 Stud Bolt and flange ≤ 25 °C; if winter construction is necessary pre-heat uniformly with an 80 °C hot-air gun—open flame prohibited.
- Temperature difference between X6NiCrTiMoVB25-15-2 Stud Bolt and flange ≤ 25 °C; if winter construction is necessary pre-heat uniformly with an 80 °C hot-air gun—open flame prohibited.
- Misalignment ≤ 0.5 mm; eccentricity introduces bending that cuts 10³ h creep life at 700 °C by 40 %.
6. Stress-corrosion cracking (SCC) prevention
- Keep X6NiCrTiMoVB25-15-2 Stud Bolt clear of halogenated cleaners and marine salt spray; if contact occurs, within 24 h rinse with 80 °C de-ionised water, blow dry with nitrogen and apply high-temperature Al-Si protective paint.
- Keep X6NiCrTiMoVB25-15-2 Stud Bolt clear of halogenated cleaners and marine salt spray; if contact occurs, within 24 h rinse with 80 °C de-ionised water, blow dry with nitrogen and apply high-temperature Al-Si protective paint.
- When mating to dissimilar metal (e.g. 2.25Cr-1Mo flange) insert Inconel 718 isolation washer so potential difference <50 mV and galvanic attack is avoided.
7. Re-check and record
- Ultrasonic bolt-stress gauge 10 % of X6NiCrTiMoVB25-15-2 Stud Bolt: actual axial force vs. target ≤ ±5 %; if out-of-tolerance remove, re-lubricate and re-tighten.
- Ultrasonic bolt-stress gauge 10 % of X6NiCrTiMoVB25-15-2 Stud Bolt: actual axial force vs. target ≤ ±5 %; if out-of-tolerance remove, re-lubricate and re-tighten.
- Build a QR-code dossier logging heat number, torque curve, operator and date for full-life traceability.
Follow the seven steps rigorously and field scrap of X6NiCrTiMoVB25-15-2 Stud Bolt caused by galling, overload or SCC stays below 0.3 %. Rework time for a 16-stud set drops from 6 h to 30 min, saving over 20 000 RMB in outage costs.
Send Message
