Incoloy 800H Sheets | High Temperature Strength ASTM B409 UNS N08810
A petrochemical giant faced catastrophic furnace tube failures at 950°C where stainless steel components deformed under creep stress, costing millions in unplanned outages. The solution? Incoloy 800H Sheets (UNS N08810) with controlled carbon content (0.05-0.10%) and coarse grain size (ASTM 5+) that delivered 5x better creep rupture life. Procurement leaders in chemical, oil & gas, marine, pharma, and power now specify these sheets for mission-critical high-temperature service where alternatives fail.
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Incoloy 800H outperforms standard Incoloy 800 and stainless steels with superior creep strength ≥120 MPa at 700°C for 10,000 hours, maintaining structural integrity up to 1100°C in carburizing, nitriding, and sulfurous atmospheres common in ethylene crackers and power plant superheaters.
Aurico Alloys LLP delivers ASTM B409 certified Incoloy 800H Sheets with full EN 10204/3.1 mill test reports, ensuring compliance for ASME Section VIII pressure vessels and global project specifications. Unlike commodity stainless that embrittles above 650°C, Incoloy 800H's stable microstructure prevents sigma phase formation.
As your trusted stockist, Aurico Alloys LLP provides affordable, authentic Incoloy 800H Sheets in thicknesses 0.3-12mm, ready for immediate dispatch to chemical plants, refineries, power stations, and marine fabricators worldwide.
High-quality Incoloy 800H Sheets ready for industrial use.
Incoloy 800H Sheets Specification
| Supplier | Aurico Alloys LLP - Incoloy 800H Stockist |
|---|---|
| Grade | Incoloy 800H UNS N08810 ASTM B409 |
| Standards | ASTM B409, ASME SB409, ISO 6208, EN 10028-7 |
| Thickness | 0.3mm - 12mm (7-28 gauge) |
| Width | 1000-2500mm |
| Length | 2000-12000mm |
| Finish | 2B, BA, No.1, Pickled, Annealed |
| Certification | MTC 3.1, PMI, RoHS, REACH |
| Price | INR 1,500 – 2,500 per kg. Indicative USD 18 – 29 per kg; quoted against grade, form, size and quantity. |
Equivalent Grades UNS N08810
| Property | Value |
|---|---|
| UNS number | N08810 |
| Werkstoff / EN number | 1.4958 |
| EN designation | X5NiCrAlTi31-20 |
| Density | 7.94 g/cm3 |
| Melting range | 1357-1385 °C |
| Specific heat (0-100 °C) | 460 J/kg·°C |
| Magnetic permeability (200 oersted at 21 °C - annealed) | 1.014 |
| Magnetic permeability (200 oersted at 21 °C - hot-rolled) | 1.009 |
| Curie temperature | -115 °C |
| Plate, sheet and strip specification | ASTM B409 / B906 |
Identifiers and physical constants for Incoloy 800H. A dash means no such designation is published for this grade.
Stock Sizes & Availability
Aurico Alloys LLP stocks Incoloy 800H Sheets in popular sizes: 1.0x1220mm coils (9.9kg/m), 3.0x1200x3000mm plates (85.8kg/pc) for immediate global shipment to refineries and power plants.
Chemical Composition ASTM B409
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 30.0 | 35.0 |
| Chromium (Cr) | 19.0 | 23.0 |
| Iron (Fe) | 39.5 | — |
| Carbon (C) | 0.05 | 0.10 |
| Aluminium (Al) | 0.15 | 0.60 |
| Titanium (Ti) | 0.15 | 0.60 |
| Aluminium + Titanium (Al+Ti) | 0.30 | 1.20 |
| Manganese (Mn) | — | 1.5 |
| Silicon (Si) | — | 1.0 |
| Copper (Cu) | — | 0.75 |
| Sulfur (S) | — | 0.015 |
Composition limits for Incoloy 800H. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical Properties High Temp
| Property | 20°C | 800°C |
|---|---|---|
| Tensile Strength MPa | ≥600 | ≥400 |
| Yield Strength MPa | ≥240 | ≥160 |
| Elongation % | ≥35 | ≥25 |
| Creep Rupture | - | ≥120 MPa @700°C |
Applications Chemical Oil Gas Power
Why this grade
Incoloy 800H shares the chemistry of 800 with two deliberate changes: carbon is controlled to 0.05–0.10% and the solution anneal is carried out at a higher temperature to give a coarser grain. Both raise creep and stress-rupture strength, which is why 800H rather than 800 is the grade for ASME pressure service above 650°C.
- Chemical: Ethylene pyrolysis tubes, acetic acid plants, FGD systems
- Power: Superheater/reheater tubing, boiler components up to 1100°C
- Oil & Gas: Hydrocarbon cracking furnaces, reformer tubing
- Marine: Exhaust systems, heat exchanger plates
- Pharma: High-temp reaction vessels, sterilization equipment
FAQ Incoloy 800H vs 800
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Why Choose Incoloy 800H Sheets
Incoloy 800H Sheets UNS N08810 from Aurico Alloys LLP deliver proven 1100°C service life, ASTM B409 certification, and immediate availability eliminating stainless steel failures in your high-stakes operations. Ready to upgrade to creep-proof Incoloy 800H performance?