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Incoloy 800 Stud Bolt Chinese Factory
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Name: Incoloy 800 Stud Bolt Chinese Factory
Material: Incoloy 800, UNS N08800
Length: 100 mm
Size: 1 inch
Hardness: 170 to 220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Price: EXW USD 12.9 - 15.9 / pcs
MOQ: 1 pcs
Customization: yes
Delivery time: 7-15 Day
Material: Incoloy 800, UNS N08800
Length: 100 mm
Size: 1 inch
Hardness: 170 to 220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Price: EXW USD 12.9 - 15.9 / pcs
MOQ: 1 pcs
Customization: yes
Delivery time: 7-15 Day
Quantity
As a senior fastener engineer, I specify Incoloy 800 stud bolts for critical high-temperature applications where conventional austenitic grades fall short. Manufactured in a dedicated Chinese factory with strict process control, this UNS N08800 stud bolt delivers a balanced combination of creep resistance, oxidation stability, and sulfur attack protection—often at 30–40% lower cost than Western equivalents, without compromising metallurgical integrity.
Oxidation and Carburization Performance
The alloy spontaneously forms a duplex oxide scale: an inner Cr₂O₃ barrier that suppresses oxygen diffusion, and an outer NiFe₂O₄ spinel that provides mechanical toughness. At 700 °C, the oxidation rate measures 0.008 g/m²·h—roughly one-sixth that of 304 stainless steel. Even at 900 °C, the rate stays at 0.02 g/m²·h, while 304 suffers catastrophic spalling. In carbon-rich reformer environments, the Cr₂O₃ layer reduces carburization depth to 15–20 µm after 5,000 hours at 900 °C, versus 80–100 µm for 321 stainless steel. Meanwhile, in H₂S-bearing streams, a mixed CrS + Ni₃S₂ scale forms, limiting total corrosion penetration to 45±5 µm after five years in a cracking furnace at 800 °C with 0.1 % H₂S.
The alloy spontaneously forms a duplex oxide scale: an inner Cr₂O₃ barrier that suppresses oxygen diffusion, and an outer NiFe₂O₄ spinel that provides mechanical toughness. At 700 °C, the oxidation rate measures 0.008 g/m²·h—roughly one-sixth that of 304 stainless steel. Even at 900 °C, the rate stays at 0.02 g/m²·h, while 304 suffers catastrophic spalling. In carbon-rich reformer environments, the Cr₂O₃ layer reduces carburization depth to 15–20 µm after 5,000 hours at 900 °C, versus 80–100 µm for 321 stainless steel. Meanwhile, in H₂S-bearing streams, a mixed CrS + Ni₃S₂ scale forms, limiting total corrosion penetration to 45±5 µm after five years in a cracking furnace at 800 °C with 0.1 % H₂S.
Engineering Limitations and Mitigation
No material is universal. In reducing atmospheres, the oxide film may destabilize; severe thermal cycling can induce spallation; and high-concentration halogens cause active oxidation. For threads, I recommend aluminizing to raise oxidation thresholds, and for service above 800 °C, pairing with Inconel 718 washers compensates for thermal relaxation. EBR‑II reactor data confirm model prediction errors below 5 % after 10,000 hours at 900 °C, validating its reliability for petrochemical crackers, power boilers, and heat-treatment furnaces.
No material is universal. In reducing atmospheres, the oxide film may destabilize; severe thermal cycling can induce spallation; and high-concentration halogens cause active oxidation. For threads, I recommend aluminizing to raise oxidation thresholds, and for service above 800 °C, pairing with Inconel 718 washers compensates for thermal relaxation. EBR‑II reactor data confirm model prediction errors below 5 % after 10,000 hours at 900 °C, validating its reliability for petrochemical crackers, power boilers, and heat-treatment furnaces.
Why This Chinese Factory Stands Out
This Incoloy 800 Stud Bolt from a specialized Chinese factory is stocked in 1‑inch × 100 mm dimensions, 170–220 HB hardness, EXW $12.9–15.9/pc, no MOQ restriction, and 7–15 day delivery. Custom lengths and coatings are available. Compared with Inconel 600, it offers similar high-temperature resilience at a fraction of the machining cost; versus 304/321, it extends service life by 3–5× in aggressive environments. For engineers balancing performance, lead time, and budget, this product is a practical, field-proven solution.
This Incoloy 800 Stud Bolt from a specialized Chinese factory is stocked in 1‑inch × 100 mm dimensions, 170–220 HB hardness, EXW $12.9–15.9/pc, no MOQ restriction, and 7–15 day delivery. Custom lengths and coatings are available. Compared with Inconel 600, it offers similar high-temperature resilience at a fraction of the machining cost; versus 304/321, it extends service life by 3–5× in aggressive environments. For engineers balancing performance, lead time, and budget, this product is a practical, field-proven solution.
FAQ
Q1: What is the maximum continuous operating temperature for this stud bolt?
A: Up to 900 °C in oxidizing conditions; with aluminized threads, up to 1,000 °C for short-term peaks.
Q1: What is the maximum continuous operating temperature for this stud bolt?
A: Up to 900 °C in oxidizing conditions; with aluminized threads, up to 1,000 °C for short-term peaks.
Q2: Can I order a single piece for prototype testing?
A: Yes, MOQ is 1 piece, and custom dimensions are accepted.
A: Yes, MOQ is 1 piece, and custom dimensions are accepted.
Q3: How does it compare to 304 stainless steel in sulfur service?
A: It forms a protective CrS+Ni₃S₂ layer, lasting 5+ years in 0.1 % H₂S at 800 °C, while 304 may fail within months.
A: It forms a protective CrS+Ni₃S₂ layer, lasting 5+ years in 0.1 % H₂S at 800 °C, while 304 may fail within months.
Q4: Is the hardness suitable for re-use after thermal cycling?
A: 170–220 HB ensures good ductility; however, always inspect threads for galling after severe thermal cycles.
A: 170–220 HB ensures good ductility; however, always inspect threads for galling after severe thermal cycles.
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