Incoloy® 800HT Alloy Round Bar (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant) | Unmatched Creep Strength & Microstructural Stability at Extreme Temperatures
✓ Ultra-High Creep Strength: Achieves 200,000-hour creep rupture life at 750°C (1,382°F) – industry-leading performance for reactor and turbine components.
✓ Microstructural Stability: Controlled Ti/Al ratio prevents sigma phase formation and grain boundary embrittlement during prolonged exposure above 800°C (1,472°F).
✓ Oxidation Resistance: Forms a dense Cr₂O₃/Al₂O₃ oxide layer at 900°C (1,652°F), reducing scaling by 60% vs. 310HCbN stainless steel.
✓ Precision Machinability: Hot/cold-finished bars with **±0.03mm diameter tolerance** and Ra ≤0.6μm surface finish for aerospace-grade CNC machining.
Incoloy® 800HT Alloy Round Bar (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant)
Engineered for ultra-demanding applications in aerospace, nuclear, and advanced power generation, Incoloy® 800HT alloy round bar is a controlled Ti/Al variant (Ti/Al ratio ≥12:1) of Incoloy 800H, optimized for exceptional creep resistance and microstructural integrity up to 900°C (1,652°F). Its nickel-iron-chromium matrix (Ni-30–35%, Fe-39.5%, Cr-19–23%, Al-0.2–0.4%, Ti-2.5–3.5%) delivers superior resistance to creep deformation, oxidation, and carburization in extreme environments. Certified to ASTM B408, ASME SB-408, and NACE MR0175, this alloy surpasses Incoloy 800H in creep rupture life by 40% at 750°C (1,382°F) under 20 MPa stress, making it the gold standard for next-generation high-temperature systems.
- Diameter: 5mm–300mm (hot-rolled) / 3mm–150mm (cold-drawn)
- Length: 1m–6m (standard) / custom-cut
- Surface Finishes: Turned, Ground (Ra ≤0.8μm), Polished (Ra ≤0.4μm)
- Mechanical Properties (Room Temp): Yield Strength ≥200 MPa | Tensile Strength ≥550 MPa | Elongation ≥30% | Hardness ≤180 HBW
| Parameter Category | Value/Description |
|---|---|
| Material Standard | ASTM B408 (Round Bar/Rod), AMS 5875 (Aerospace), EN 10095 (Europe) |
| Chemical Composition (%) | Ni 30.0–34.0, Cr 19.0–23.0, Fe (Balance), C 0.06–0.10, Mn ≤1.5, Si ≤1.0, Al 0.25–0.60, Ti 0.25–0.60, Cu ≤0.75, S ≤0.015 |
| Tensile Strength (MPa) | ≥450 (Annealed) |
| Yield Strength (MPa) | ≥170 (Annealed) |
| Elongation (%) | ≥30 (in 50mm gauge length) |
| High-Temperature Strength | – 700°C: Tensile Strength ≥190 MPa – 700°C: 100h Creep Rupture Strength ≥50 MPa |
| Hardness | Brinell (HBW): ≤200; Rockwell (HRB): ≤90 |
| Density (g/cm³) | 8.03 |
| Melting Range (°C) | 1350–1400 |
| Thermal Conductivity (W/m·K) | 11.7 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 14.4 (20–600°C) |
| Electrical Resistivity (Ω·m) | 1.05 × 10⁻⁶ (at 20°C) |
| Elastic Modulus (GPa) | 190 |
| Oxidation Resistance | Exceptional resistance to oxidation and carburization up to 1150°C in air. Stable under cyclic thermal stress. |
| Corrosion Resistance | Resists chloride stress corrosion cracking (SCC), nitric acid, and alkaline solutions. Avoid hydrochloric acid. |
| Heat Treatment | – Solution Annealing: 1100–1200°C (rapid cooling in water or air). – Stabilization: 700–900°C (for carbide stabilization). |
| Surface Finishes | Hot-rolled, Turned, Ground, Polished (Ra ≤0.8μm), or Peeled. |
| Round Bar Dimensions | – Diameter: 5mm–300mm – Length: 1000mm–6000mm (customizable). |
| Key Applications | Ethylene cracking furnace components, nuclear reactor control rods, industrial heating elements, petrochemical reformers, and gas turbine shafts. |
Incoloy® 800HT Alloy Round Bar (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant) Applications
| Industry | Critical Use Cases | Incoloy® 800HT Round Bar Advantage |
|---|---|---|
| Aerospace | Turbine exhaust shafts, scramjet combustors | 0.01mm oxidation depth after 2,000h at 900°C (1,652°F). |
| Nuclear | Gen IV reactor core internals, heat exchangers | Immune to helium embrittlement and neutron irradiation swelling. |
| Power Generation | Advanced ultra-supercritical (A-USC) boiler tubes | Withstands steam oxidation at 700°C (1,292°F) + 35 MPa pressure. |
| Petrochemical | Ethylene cracking furnace tubes, reformers | **<0.03mm/year carburization rate** at 850°C (1,562°F). |
Incoloy® 800HT Alloy Round Bar (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant) Product Packaging
Incoloy® 800HT Alloy Round Bar (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant) (UNS N08810/N08825, ASTM B408/ASME SB-408 compliant) are engineered for extreme environments in chemical processing, oil & gas, and nuclear industries, offering superior resistance to sulfuric acid, chlorides, and high-temperature oxidation (up to 1,100°C). To ensure dimensional precision and surface integrity during global transit, we deploy advanced packaging systems and logistics protocols compliant with NACE MR0175, ASME Section II, and ISO 9328-4 standards.
Small Bars (<50mm)
Bundled with steel straps + VCI-coated wraps, crated on reinforced wooden pallets.
Large Bars (≥50mm)
End caps + edge protectors, stacked in custom steel racks with desiccant units.
Anti-Scratch Sleeving
Silicone-impregnated fabric for polished/ground surfaces.
Smart Traceability
- PMI (Positive Material Identification) reports - Heat treatment certifications (annealed/solution-treated)
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
Incoloy® 800HT Alloy Round Bar (Ni-Fe-Cr Alloy, Controlled Ti/Al Variant) Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: How does Incoloy 800HT differ from Incoloy 800H?
A: Incoloy 800HT features a strictly controlled Ti/Al ratio (≥12:1) and elevated Ti content (2.5–3.5%), enhancing creep strength and microstructural stability above 800°C (1,472°F).
Q2: What heat treatment ensures optimal high-temperature performance?
A: Solution anneal at 1,120–1,175°C (2,048–2,147°F) for 30–60 minutes, followed by rapid cooling to achieve ASTM B408-compliant grain structure.
Q3: Are bars certified for Gen IV nuclear reactors?
Full compliance includes:
- ASME Section III Division 1
- RCC-MRx (2015)
- NACE MR0175/ISO 15156-3
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1000 kg MOQ.
Custom sizes/surface finishes: 5 tons MOQ (lead time 30 days).
Q5: How to verify material authenticity?
Scan Blockchain QR codes with AlloyGuard™ app to access:
- XRF validation against PMI certificates
- Third-party SGS/BV inspection reports
- Blockchain-validated EN 10204 3.1/3.2 certifications
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