Incoloy 800H High Temperature & Corrosion Resistant
Nickel-Iron-Chromium Alloy Bar
Products Specification
Standard | AISI, ASTM, BS, DIN, GB, JIS |
Grade | Monel series: 400 K500
Inconel series: 600 601 625 718 725
Incoloy series: 800 800H 825 925
Hastelloy series: B,B2,B3,C,C-276,C-4,C-22
Pure: Ni200, Ni201 |
Specifications | Round bar | Diameter:4~300mm |
Flat bar | Thickness | 1.0~100mm |
Width | 1~1500mm |
Square bar | Size: 4*4-100*100mm |
Length | 2m, 5.8m, 6m, or as required. |
Surface | Black, peeled, polishing, bright, sand blast, hair line, etc. |
Price Term | Ex-work, FOB, CFR, CIF, etc. |
Delivery Time | Standard size is in stock,prompt delivery or as order's quantity. |
Incoloy 800H High Temperature & Corrosion Resistant
Nickel-Iron-Chromium Alloy Bar
Incoloy 800H is a premium nickel-iron-chromium alloy bar engineered
specifically to deliver exceptional performance in extreme
high-temperature and corrosive environments. Its unique chemical
composition and carefully optimized mechanical properties make it a
top choice for critical applications across industries such as
energy, petrochemical, and aerospace, where reliability and
durability under harsh conditions are non-negotiable.
1. Chemical Composition
The precise chemical makeup of Incoloy 800H is the foundation of
its superior performance. It adheres to strict industry standards
to ensure consistency and quality, with the following typical
composition (in weight percentage, wt%):
| Element | Content Range (wt%) | Role |
|---|
| Nickel (Ni) | 30.0 - 35.0 | Enhances high-temperature strength, ductility, and resistance to
oxidation. |
| Iron (Fe) | Balance | Provides structural stability and acts as the base metal for the
alloy. |
| Chromium (Cr) | 19.0 - 23.0 | Delivers excellent resistance to corrosion, oxidation, and
carburization at high temperatures. |
| Carbon (C) | 0.05 - 0.10 | Improves creep strength and high-temperature structural integrity
(a key distinction of the "H" grade). |
| Manganese (Mn) | ≤ 1.50 | Aids in deoxidation during manufacturing and enhances workability. |
| Silicon (Si) | ≤ 1.00 | Enhances oxidation resistance and supports alloy formation. |
| Copper (Cu) | ≤ 0.75 | Adds minor corrosion resistance benefits without compromising other
properties. |
| Aluminum (Al) | 0.15 - 0.60 | Boosts oxidation resistance by forming a protective oxide layer at
high temperatures. |
| Titanium (Ti) | 0.15 - 0.60 | Works with aluminum to stabilize the alloy and improve creep
resistance; also enhances grain structure. |
| Phosphorus (P) | ≤ 0.030 | Controlled to minimize brittleness and maintain alloy purity. |
| Sulfur (S) | ≤ 0.015 | Strictly limited to prevent hot cracking and maintain mechanical
integrity. |
2. Mechanical Properties
Incoloy 800H exhibits outstanding mechanical strength, especially
at elevated temperatures, along with good ductility at room
temperature. The following properties are typical for annealed
alloy bars (tested at room temperature unless specified otherwise):
| Property | Test Standard | Typical Value |
|---|
| Tensile Strength (UTS) | ASTM B408 | ≥ 550 MPa (80 ksi) |
| Yield Strength (0.2% offset) | ASTM B408 | ≥ 240 MPa (35 ksi) |
| Elongation at Break | ASTM B408 | ≥ 30% (in 50 mm) |
| Hardness (Brinell) | ASTM E10 | ≤ 190 HB |
| Creep Rupture Strength | ASTM E139 | ≥ 100 MPa at 815°C (1500°F) for 10,000 hours |
| Modulus of Elasticity | - | 200 GPa (29 x 10⁶ psi) at room temperature; decreases slightly with
increasing temperature. |
Note: Mechanical properties may vary slightly based on bar
diameter, heat treatment process, and testing conditions. For
high-temperature applications, consult detailed creep and
stress-rupture data specific to your operating temperature range.
3. Product Standards
Incoloy 800H alloy bars are manufactured and inspected in
compliance with globally recognized standards to ensure quality,
safety, and interchangeability. Key standards include:
- ASTM B408: Standard Specification for Nickel-Iron-Chromium Alloy
(Incoloy 800, 800H, 800HT) Bars and Rods This is the primary standard for Incoloy 800H bars, covering
chemical composition, mechanical properties, dimensional
tolerances, and quality control requirements.
- ASME SB408: Boiler and Pressure Vessel Code (BPVC) Specification Used for bars intended for pressure-containing components in
boilers, reactors, and other pressure vessels.
- DIN EN 10095: European Standard for Heat-Resisting Steels and
Alloys (for bars used in European markets).
- JIS G4902: Japanese Industrial Standard for Nickel-Based
Heat-Resisting Alloys (relevant for Asia-Pacific applications).
All bars undergo rigorous testing, including chemical analysis (via
X-ray fluorescence or optical emission spectroscopy), mechanical
testing (tensile, hardness), and non-destructive testing (NDT) such
as ultrasonic inspection to detect internal defects.
4. Product Advantages
Incoloy 800H stands out from other heat-resistant alloys due to its
unique combination of benefits, making it ideal for demanding
environments:
- Exceptional High-Temperature Stability: Maintains strength and
structural integrity at temperatures up to 870°C (1600°F), with
excellent creep and stress-rupture resistance—critical for
long-term service in furnaces, reactors, and turbine components.
- Superior Corrosion & Oxidation Resistance: The
chromium-aluminum-titanium content forms a dense, adherent oxide
layer that protects the alloy from oxidation, sulfidation, and
carburization in harsh media (e.g., flue gases, petrochemical
streams, and high-temperature water).
- Excellent Ductility & Fabricability: Despite its high strength,
Incoloy 800H offers good ductility at room temperature, enabling
easy machining, welding, and forming into complex shapes (e.g.,
bolts, shafts, and heat exchanger tubesheets).
- Stable Chemical Composition: Strict control over carbon, titanium,
and aluminum levels ensures consistent performance across batches,
reducing the risk of premature failure in critical applications.
- Versatility: Performs well in both oxidizing and slightly reducing
environments, making it suitable for a wide range of industries
(energy, petrochemical, aerospace, and more).
5. Related Products
In addition to Incoloy 800H round bars, we offer a full range of
Incoloy 800-series products to meet diverse application needs:
- Incoloy 800 Round Bars/Rods: Lower carbon content (0.03-0.10 wt%)
than 800H, suitable for moderate-temperature corrosion-resistant
applications (up to 760°C/1400°F).
- Incoloy 800HT Round Bars/Rods: Higher carbon, aluminum, and
titanium content than 800H, optimized for ultra-high-temperature
creep resistance (up to 980°C/1800°F).
- Incoloy 800H Sheets/Plates: Used for fabricating furnace liners,
heat exchanger shells, and pressure vessel components.
- Incoloy 800H Pipes/Tubes: Ideal for high-temperature fluid
transport in petrochemical plants and power generation facilities.
- Incoloy 800H Forgings: Custom-forged components (e.g., valves,
flanges, and fittings) for heavy-duty industrial applications.
All related products adhere to the same strict quality standards as
Incoloy 800H round bars, ensuring consistency across your entire
project.
6. Applications
Incoloy 800H round bars are widely used in industries where
high-temperature strength and corrosion resistance are critical.
Key applications include:
- Energy Industry: Boiler tubes, superheater tubes, turbine blades,
and nuclear reactor components (due to resistance to
high-temperature water and radiation-induced corrosion).
- Petrochemical Industry: Reactor vessels, catalyst support grids,
heat exchanger tubesheets, and piping for processing
high-temperature hydrocarbons (resistant to sulfidation and
carburization).
- Aerospace Industry: Engine components (e.g., combustion chambers,
exhaust manifolds) and aircraft structural parts that operate at
elevated temperatures.
- Metallurgical Industry: Furnace rollers, annealing 炉 fixtures, and
heat treatment baskets (resistant to oxidation and thermal
cycling).
- Chemical Industry: Pressure vessels, agitators, and valves for
handling corrosive chemicals (e.g., acids, alkalis) at high
temperatures.
Whether your application requires long-term creep resistance,
corrosion protection, or structural stability in extreme heat,
Incoloy 800H round bars deliver reliable performance you can trust.
