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718 Stud Chinese Factory Direct
QS Fastener: 718 Stud Chinese Factory Direct
Name: 718 Stud Chinese Factory Direct
Standard: ASME
Material: Inconel 718
Size: 3/4 inch
Lenght: 150 mm
Temperature: -250 to 700℃
Surface: Natural color
Price: EXW USD 19.9 - 29.9/ pcs
MOQ: 10 pcs
Customization: yes
Delivery time: 7-15 Day
Standard: ASME
Material: Inconel 718
Size: 3/4 inch
Lenght: 150 mm
Temperature: -250 to 700℃
Surface: Natural color
Price: EXW USD 19.9 - 29.9/ pcs
MOQ: 10 pcs
Customization: yes
Delivery time: 7-15 Day
Quantity
This Nickel 718 Double End Stud, sized 3/4 in × 150 mm, is manufactured from precipitation-hardening Inconel 718 superalloy in strict compliance with ASME standards. It delivers exceptional mechanical performance across a service range of –250 °C to 700 °C, combining high tensile strength (≥965 MPa at 700 °C), fatigue resistance, and inherent corrosion protection—no surface coating required. Typical applications include petrochemical flange joints, gas turbine casings, cryogenic vessels, and liquid-hydrogen piping systems.
Why Inconel 718?
Containing 50–55 % Ni, 17–21 % Cr, plus Nb, Mo, Ti, and Al, this alloy achieves its property balance through solution treatment and double ageing, which precipitate fine γ″ (Ni₃Nb) and γ′ (Ni₃Al,Ti) phases. These microstructural features preserve impact toughness down to –250 °C (Charpy >60 J) and provide stress-rupture life exceeding 210 h at 650 °C. The alloy is non-magnetic, readily weldable, and machinable, making it the preferred material for turbine disks, aerospace fasteners, down-hole tools, and reactor internals.
Containing 50–55 % Ni, 17–21 % Cr, plus Nb, Mo, Ti, and Al, this alloy achieves its property balance through solution treatment and double ageing, which precipitate fine γ″ (Ni₃Nb) and γ′ (Ni₃Al,Ti) phases. These microstructural features preserve impact toughness down to –250 °C (Charpy >60 J) and provide stress-rupture life exceeding 210 h at 650 °C. The alloy is non-magnetic, readily weldable, and machinable, making it the preferred material for turbine disks, aerospace fasteners, down-hole tools, and reactor internals.
Nickel Content – The Performance Pivot
Within the specified 50–55 % Ni range, each 1 % increase delivers approximately 15 % longer stress-rupture life, 8–10 J higher cryogenic Charpy energy, and halves the stress-corrosion crack growth rate. At lower Ni (~50 %), δ-phase (Ni₃Nb) precipitation at grain boundaries can reduce ductility; at higher Ni (~54–55 %), finer γ″ precipitates improve high-cycle fatigue life by up to 3× at 700 °C. For cryogenic sealing applications (e.g., rocket engine flanges), 55 % Ni studs retain >92 % preload after 50 liquid-hydrogen cycles, versus only 72 % retention at 50 % Ni. Production uses VIM + ESR double melting to control Ni within ±0.3 %, ensuring lot-to-lot stability. For continuous service above 650 °C, we recommend Ni >54 % with Nb adjusted to 5.15–5.35 % to suppress coarse δ-phase and maintain ≤2 % relaxation over 10,000 hours.
Within the specified 50–55 % Ni range, each 1 % increase delivers approximately 15 % longer stress-rupture life, 8–10 J higher cryogenic Charpy energy, and halves the stress-corrosion crack growth rate. At lower Ni (~50 %), δ-phase (Ni₃Nb) precipitation at grain boundaries can reduce ductility; at higher Ni (~54–55 %), finer γ″ precipitates improve high-cycle fatigue life by up to 3× at 700 °C. For cryogenic sealing applications (e.g., rocket engine flanges), 55 % Ni studs retain >92 % preload after 50 liquid-hydrogen cycles, versus only 72 % retention at 50 % Ni. Production uses VIM + ESR double melting to control Ni within ±0.3 %, ensuring lot-to-lot stability. For continuous service above 650 °C, we recommend Ni >54 % with Nb adjusted to 5.15–5.35 % to suppress coarse δ-phase and maintain ≤2 % relaxation over 10,000 hours.
Why Choose Chinese Factory Direct?
Sourcing this 718 Stud directly from our Chinese factory eliminates intermediary costs, offers flexible customization (MOQ 10 pcs), and ensures delivery within 7–15 days. With EXW pricing at USD 19.9–29.9/pcs, you receive ASME-compliant components backed by rigorous process control—ideal for both maintenance stock and engineered-to-order projects.
Sourcing this 718 Stud directly from our Chinese factory eliminates intermediary costs, offers flexible customization (MOQ 10 pcs), and ensures delivery within 7–15 days. With EXW pricing at USD 19.9–29.9/pcs, you receive ASME-compliant components backed by rigorous process control—ideal for both maintenance stock and engineered-to-order projects.
FAQ – English Market
1. Q: What temperature range can this 718 Stud handle?
A: –250 °C to 700 °C, with stable strength and toughness throughout.
1. Q: What temperature range can this 718 Stud handle?
A: –250 °C to 700 °C, with stable strength and toughness throughout.
2. Q: Is surface treatment required for corrosion resistance?
A: No—the alloy’s natural oxide film provides inherent protection; no coating needed.
A: No—the alloy’s natural oxide film provides inherent protection; no coating needed.
3. Q: What is the minimum order quantity?
A: MOQ is 10 pieces, with customization available.
A: MOQ is 10 pieces, with customization available.
4. Q: How does Ni content affect bolt preload retention at cryogenic temperatures?
A: Higher Ni (52–55 %) significantly improves preload retention—tested at 92 % vs. 72 % at lower Ni.
A: Higher Ni (52–55 %) significantly improves preload retention—tested at 92 % vs. 72 % at lower Ni.
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