Incoloy® 800H Alloy Round Bar (Ni-Fe-Cr Alloy, High-Carbon Variant) | Unrivaled High-Temperature Creep Strength & Oxidation Resistance

✓ Enhanced Creep Resistance: Achieves 100,000-hour creep rupture life at 700°C (1,292°F) – 30% higher than standard Incoloy 800.

✓ Oxidation & Carburization Resistance: Forms a dense Cr₂O₃/Al₂O₃ oxide layer at 815°C (1,500°F), reducing scaling by 50% vs. 310S stainless steel.

✓ Thermal Fatigue Resilience: Withstands 15,000+ thermal cycles between 20°C–800°C (68°F–1,472°F) without cracking.

✓ Precision Machinability: Hot/cold-finished bars with **±0.05mm diameter tolerance** and Ra ≤0.8μm surface finish for CNC/lathe machining.

Incoloy® 800H Alloy Round Bar (Ni-Fe-Cr Alloy, High-Carbon Variant)

Engineered for extreme-temperature applications in petrochemical, nuclear, and power generation industries, Incoloy® 800H alloy round bar is a high-carbon variant (C: 0.05–0.10%) of Incoloy 800, optimized for superior creep resistance and microstructural stability up to 815°C (1,500°F). Its nickel-iron-chromium matrix (Ni-30–35%, Fe-39.5%, Cr-19–23%, Al-0.4%, Ti-0.4%) delivers unmatched performance in oxidizing, carburizing, and nitriding environments. Certified to ASTM B408, ASME SB-408, and NACE MR0175, this alloy surpasses standard Incoloy 800 in creep rupture lifespan by 2.5x at 700°C (1,292°F) under 100 MPa stress.

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 ≥170 MPa | Tensile Strength ≥450 MPa | Elongation ≥30% | Hardness ≤150 HBW

Parameter Category	Value/Description
Material Standard	ASTM B408 (Round Bar/Rod), AMS 5874 (Aerospace), EN 10095 (Europe)
Chemical Composition (%)	Ni 30.0–35.0, Cr 19.0–23.0, Fe (Balance), C 0.05–0.10, Mn ≤1.5, Si ≤1.0, Al 0.15–0.60, Ti 0.15–0.60, 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 ≥180 MPa – 700°C: 100h Creep Rupture Strength ≥45 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	Superior 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. Vulnerable to hydrochloric acid.
Heat Treatment	– Solution Annealing: 1100–1200°C (rapid cooling in water or air). – Stabilization: 700–900°C (for carbide precipitation control).
Surface Finishes	Hot-rolled, Turned, Ground, Polished (Ra ≤0.8μm), or Peeled.
Round Bar Dimensions	– Diameter: 5mm–300mm – Length: 1000mm–6000mm (customizable).
Key Applications	High-temperature furnace components, nuclear reactor control rods, ethylene cracking tubes, petrochemical reformers, and industrial heating systems.

Incoloy® 800H Alloy Round Bar (Ni-Fe-Cr Alloy, High-Carbon Variant) Applications

Industry	Critical Use Cases	Incoloy® 800H Round Bar Advantage
Petrochemical	Ethylene cracking furnace tubes, reformers	0.02mm/year carburization rate at 800°C (1,472°F).
Nuclear	Reactor core internals, heat exchanger tubing	Immune to neutron embrittlement and chloride SCC.
Power Generation	Ultra-supercritical (USC) boiler headers	Resists steam oxidation at 650°C (1,202°F) + 30 MPa pressure.
Heat Treatment	Annealing furnace retorts, radiant tubes	Withstands 20,000+ thermal cycles (20°C–815°C).

Incoloy® 800H Alloy Round Bar (Ni-Fe-Cr Alloy, High-Carbon Variant) Product Packaging

Incoloy® 800H Alloy Round Bar (Ni-Fe-Cr Alloy, High-Carbon 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.

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。

Incoloy® 800H Alloy Round Bar (Ni-Fe-Cr Alloy, High-Carbon 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: What differentiates Incoloy 800H from standard Incoloy 800?

A: Incoloy 800H features a higher carbon content (0.05–0.10%) and controlled Al/Ti ratios, enhancing creep strength and microstructural stability above 600°C (1,112°F).

Q2: What heat treatment optimizes high-temperature performance?

A: Solution anneal at 1,100–1,175°C (2,012–2,147°F) for 20–60 minutes, followed by rapid cooling to refine grain structure and maximize creep resistance.

Q3: Are bars certified for Gen IV nuclear reactors?

Full compliance includes: