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
Zhangzhou Incoloy 901 Fastener
QS Fastener: Zhangzhou Incoloy 901 Fastener
Name: Zhangzhou Incoloy 901 Fastener
Material: Incoloy 901
Standard: UNS N09901
Size: M30
Length: 280 mm
Application: For Aeroengine Component
Feature: High Yield Strength and Durable Strength
Material: Incoloy 901
Standard: UNS N09901
Size: M30
Length: 280 mm
Application: For Aeroengine Component
Feature: High Yield Strength and Durable Strength
Quantity
Incoloy 901 Fastener (UNS N09901), size M30×280 mm, is purpose-built for flight-critical gas-turbine hardware. It delivers outstanding yield strength and creep rupture strength, maintaining stable performance under extreme heat and stress, making it the ideal high-reliability fastening solution for aerospace applications.
Does Incoloy 901 Fastener require ageing after welding or installation?
As a rule, Incoloy 901 Fastener should NOT be aged after welding or installation, and in most cases ageing is simply unnecessary. The reasons are outlined below:
As a rule, Incoloy 901 Fastener should NOT be aged after welding or installation, and in most cases ageing is simply unnecessary. The reasons are outlined below:
✅ 1. Incoloy 901 Fastener is a precipitation-hardening super-alloy
Its high strength comes from the precipitation of γ′ (Ni₃(Al,Ti)) and γ″ (Ni₃Nb) phases. Final mechanical properties depend on a closely controlled heat-treatment cycle—typically solution treatment plus a two-step age.
Its high strength comes from the precipitation of γ′ (Ni₃(Al,Ti)) and γ″ (Ni₃Nb) phases. Final mechanical properties depend on a closely controlled heat-treatment cycle—typically solution treatment plus a two-step age.
⚠️ 2. Incoloy 901 Fastener is supplied fully heat-treated
Whether commercial or aero-grade, Incoloy 901 Fastener (AMS 5714, ASTM A453 Grade 660, etc.) leaves the mill already solution-treated and aged to the required UTS (≥ 1035 MPa) and yield strength. Re-heating a finished fastener (e.g. for post-weld heat-treatment) redissolves and coarsens the precipitates, causing strength loss and possible grain-boundary embrittlement.
Whether commercial or aero-grade, Incoloy 901 Fastener (AMS 5714, ASTM A453 Grade 660, etc.) leaves the mill already solution-treated and aged to the required UTS (≥ 1035 MPa) and yield strength. Re-heating a finished fastener (e.g. for post-weld heat-treatment) redissolves and coarsens the precipitates, causing strength loss and possible grain-boundary embrittlement.
🔥 3. Welding severely degrades Incoloy 901 Fastener properties
Incoloy 901 Fastener has poor weldability; welding a finished bolt is therefore discouraged. If a joint must be made (e.g. stud welding Incoloy 901 Fastener to a casing):
- use a matching filler such as ERNiFeCr-2;
- keep the threaded or load-bearing regions out of the heat zone;
- do NOT age the fastener itself after welding—the optimised microstructure cannot be restored by a second cycle and may be damaged beyond recovery.
Incoloy 901 Fastener has poor weldability; welding a finished bolt is therefore discouraged. If a joint must be made (e.g. stud welding Incoloy 901 Fastener to a casing):
- use a matching filler such as ERNiFeCr-2;
- keep the threaded or load-bearing regions out of the heat zone;
- do NOT age the fastener itself after welding—the optimised microstructure cannot be restored by a second cycle and may be damaged beyond recovery.
📌 4. No post-installation heat-treatment is required
Mechanical installation (torquing, pre-loading) does not alter the microstructure of Incoloy 901 Fastener, so ageing is neither required nor permitted. If local cold-work occurs during assembly, a low-temperature stress-relief (< 600 °C) may be considered, but its effect on fastener strength must be carefully evaluated.
Mechanical installation (torquing, pre-loading) does not alter the microstructure of Incoloy 901 Fastener, so ageing is neither required nor permitted. If local cold-work occurs during assembly, a low-temperature stress-relief (< 600 °C) may be considered, but its effect on fastener strength must be carefully evaluated.
✅ Conclusion:
Do not age Incoloy 901 Fastener after welding (if unavoidable) or after installation.
Best practice is to use fasteners that have already been heat-treated to specification and to avoid any additional thermal cycles. When welding is essential, a qualified team must qualify the procedure and minimise heating of the Incoloy 901 Fastener itself.
Do not age Incoloy 901 Fastener after welding (if unavoidable) or after installation.
Best practice is to use fasteners that have already been heat-treated to specification and to avoid any additional thermal cycles. When welding is essential, a qualified team must qualify the procedure and minimise heating of the Incoloy 901 Fastener itself.
When Incoloy 901 Fastener is used in safety-critical engine locations, always follow AMS 5714, ASTM A453 or the OEM technical specification for installation and maintenance to guarantee system safety and service life.
Send Message
