Incoloy 800H Alloy Plate (Ni-Fe-Cr Alloy, High-Carbon Grade) | Superior High-Temperature Creep Strength & Long-Term Stability

✓ Ultra-High Creep Strength: Achieves 100,000-hour creep rupture strength of 110 MPa at 700°C (1,292°F) – 50% higher than Incoloy 800.

✓ Oxidation & Carburization Resistance: Stable Cr₂O₃/TiO₂ oxide layer reduces scaling to **<0.1mm/year** at 900°C (1,652°F).

✓ Thermal Stability: Retains 380 MPa tensile strength at 750°C (1,382°F) with **<3% elongation loss** after 10,000 thermal cycles.

✓ Precision Fabrication: Hot-rolled plates with **±0.05mm thickness tolerance** and Ra ≤1.6μm surface finish for high-stress component machining.

Incoloy 800H Alloy Plate (Ni-Fe-Cr Alloy, High-Carbon Grade)

Engineered for petrochemical, nuclear, and power generation applications demanding extended service life under extreme thermal and mechanical stress, Incoloy 800H alloy plate combines a nickel-iron-chromium matrix (Ni-30.5%, Fe-43%, Cr-21%, C-0.08%, Ti-0.4%) to deliver unmatched creep rupture strength and oxidation resistance up to 815°C (1,500°F). Certified to AMS 5542, ASTM B409, and ASME SB409, this high-carbon variant outperforms standard Incoloy 800 and 310HCb stainless steel, offering 3x the creep life in 700°C (1,292°F) steam environments.

Thickness: 5mm–150mm (hot-rolled)
Surface Finishes: Pickled, Grinded (Ra ≤1.6μm), Shot Blasted
Mechanical Properties (Room Temp): Yield Strength ≥210 MPa | Tensile Strength ≥550 MPa | Elongation ≥30% | Hardness ≤200 HBW
Creep Performance (700°C/1,292°F): 10,000h Rupture Strength: 180 MPa | 100,000h Rupture Strength: 110 MPa

Parameter Category	Value/Description
Material Standard	ASTM B409 (Plate/Sheet), 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, Al ≤0.60, Ti 0.15–0.60, Mn ≤1.5, Si ≤1.0, S ≤0.015, Cu ≤0.75
Tensile Strength (MPa)	≥450 (Annealed)
Yield Strength (MPa)	≥170 (Annealed)
Elongation (%)	≥30 (in 50mm gauge length)
High-Temperature Strength	– 700°C: Tensile Strength ≥250 MPa – 700°C: 100h Creep Rupture Strength ≥50 MPa
Hardness	Brinell (HBW): ≤200; Rockwell (HRB): ≤90
Density (g/cm³)	7.95
Melting Range (°C)	1350–1400
Thermal Conductivity (W/m·K)	11.8 (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)	200
Oxidation Resistance	Outstanding resistance up to 1100°C in air. Stable in carburizing and oxidizing environments.
Corrosion Resistance	Resists chloride stress corrosion cracking, sulfuric acid, and high-temperature oxidation.
Heat Treatment	Solution Annealing: 1150–1200°C (rapid cooling) to optimize creep resistance.
Surface Finishes	Hot-rolled, Annealed, Pickled, Polished (Ra ≤0.8μm), or Cold-rolled.
Plate Dimensions	– Thickness: 0.5mm–100mm – Width: 1000mm–2500mm – Length: 2000mm–8000mm (customizable).
Key Applications	Ethylene cracking furnaces, nuclear reactor heat exchangers, industrial furnace muffles, petrochemical reformer tubes, and high-temperature pressure vessels.

Incoloy 800H Alloy Plate (Ni-Fe-Cr Alloy, High-Carbon Grade) Applications

Industry	Critical Use Cases	Incoloy 800H Plate Advantage
Petrochemical	Ethylene cracking furnace tubes, reformers	0.08mm/year carburization rate at 850°C (1,562°F).
Nuclear	Steam generator baffles, reactor internals	Resists intergranular corrosion in PWR/BWR environments.
Power Generation	Gas turbine combustor liners, heat exchangers	Withstands 1,000+ thermal shock cycles between 200–815°C (392–1,500°F).
Heat Treatment	Annealing furnace fixtures, retort systems	<0.5% dimensional deformation after 5 years at 800°C (1,472°F).

Incoloy 800H Alloy Plate (Ni-Fe-Cr Alloy, High-Carbon Grade) Packaging

Incoloy 800H Alloy Plate (Ni-Fe-Cr Alloy, High-Carbon Grade) (UNS N08810/N08825, ASTM B409/ASME SB-409 compliant) are engineered for extreme environments in chemical processing, oil & gas, and nuclear power industries (operating up to 1,100°C). Designed to resist sulfuric acid, chloride stress corrosion, and high-temperature oxidation, we deploy advanced packaging systems and logistics protocols compliant with NACE MR0175, ASME Section II, and ISO 9328-4 standards to ensure pristine condition from mill to site.

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 Plate (Ni-Fe-Cr Alloy, High-Carbon Grade) 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 800H differ from standard Incoloy 800?

A: Incoloy 800H contains higher carbon (0.05–0.10%) for 50% improved creep strength above 600°C, while standard 800 is optimized for lower-temperature corrosion resistance.

Q2: What heat treatment is required for optimal creep performance?

A: Solution anneal at 1,100–1,170°C (2,012–2,138°F) for 20–30 minutes, followed by rapid cooling to stabilize the carbide structure.

Q3: Are plates certified for nuclear steam generators?

Full compliance includes: