Stockist & supplier ASTM B409 · ASTM B424 · ASME SB-409 · ASME SB-424
Incoloy 800/800H & 825 Plates — ASTM B409 & B424
Alloy 800/800H and 825 plates are nickel-iron-chromium alloy plates for high-temperature and corrosive service. Teshi Group stocks and supplies UNS N08800 and N08810 plate to ASTM B409 and UNS N08825 plate to ASTM B424. Quotes are sent in 24–48 hours.
Also called: Incoloy 800 plate, Incoloy 800H plate, Incoloy 825 plate, UNS N08800 plate, UNS N08825 plate
What are Incoloy 800/800H & 825 Plate?
Incoloy is a trade name. Alloy 800 (UNS N08800) and 800H (UNS N08810) are nickel-iron-chromium alloys for high-temperature service; 800H has controlled carbon (0.05–0.10%) and a coarse grain size for creep strength, and is used in reformer and cracking furnaces and heat exchangers. Alloy 825 (UNS N08825) adds molybdenum, copper and titanium, giving resistance to sulphuric and phosphoric acids, chloride stress-corrosion cracking and pitting. It is used in acid plants, pickling equipment and sour oil and gas service.
Key features
- Stockist and supplier — sourced from nickel alloy mills; Teshi does not manufacture plate
- UNS N08800 / N08810 to ASTM B409; UNS N08825 to ASTM B424
- 800H with controlled carbon and grain size (ASTM No. 5 or coarser) for creep service
- 825 for sulphuric acid and chloride service
- Plate, sheet and strip; other sizes supplied against order
- Matching nickel alloy flanges manufactured by Teshi against order
Specification
| Supply | Stockist & supplier — Teshi Group, India |
|---|---|
| Standards | ASTM B409 / ASME SB-409 (N08800, N08810, N08811); ASTM B424 / ASME SB-424 (N08825) |
| Grades | UNS N08800 (800), N08810 (800H), N08811 (800HT) against order, N08825 (825) |
| Product forms | Plate 3/16 in (4.76 mm) and thicker; sheet and strip in thinner gauges; other sizes supplied against order |
| Condition | Annealed; 800H solution annealed with grain size ASTM No. 5 or coarser |
| Other plate grades stocked | Carbon / boiler: IS 2062 E250–E450, ASTM A36, A516 Gr 60 / 70, A537; Cr-Mo: ASTM A387 Gr 11, 12, 22, 91; stainless: ASTM A240 304 / 304L / 304H, 309S, 310S, 316 / 316L / 316H / 316Ti, 317L, 321 / 321H, 347 / 347H, 410, 430, 904L, 254 SMO; duplex S31803 / S32205; super duplex S32750 / S32760; nickel: Monel 400 (B127), Inconel 600 (B168), Inconel 625 (B443), Incoloy 800 / 800H / 800HT (B409), Incoloy 825 (B424), Hastelloy C276 / C22 (B575), Hastelloy B2 / B3 (B333), Alloy 20 (B463), Nickel 200 / 201 (B162); titanium Gr 1, 2, 5, 7, 12 (B265); Cu-Ni 90/10, 70/30 (B171) |
| Testing | Chemical and tensile tests per the standard; grain size for 800H |
| Documents | Mill test certificate to EN 10204 3.1; EN 10204 3.2 / third-party inspection when the order specifies |
Applications
- Reformer and ethylene furnace parts (800H)
- High-temperature heat exchangers
- Sulphuric and phosphoric acid plant (825)
- Pickling tanks and equipment
- Sour oil and gas service
Chemical composition — alloy 800/800H (ASTM B409) and 825 (ASTM B424)
| UNS | Ni | Cr | Fe | C | Mn | Si | S | Cu | Al | Ti | Mo |
|---|---|---|---|---|---|---|---|---|---|---|---|
| N08800 | 30.0–35.0 | 19.0–23.0 | 39.5 min | 0.10 | 1.5 | 1.0 | 0.015 | 0.75 | 0.15–0.60 | 0.15–0.60 | — |
| N08810 | 30.0–35.0 | 19.0–23.0 | 39.5 min | 0.05–0.10 | 1.5 | 1.0 | 0.015 | 0.75 | 0.15–0.60 | 0.15–0.60 | — |
| N08825 | 38.0–46.0 | 19.5–23.5 | Balance | 0.05 | 1.0 | 0.5 | 0.03 | 1.5–3.0 | 0.2 | 0.6–1.2 | 2.5–3.5 |
Maximum unless a range or minimum is shown; % by weight.
Mechanical properties
| UNS (annealed plate) | Tensile, min (MPa) | Yield 0.2%, min (MPa) | Elongation, min (%) |
|---|---|---|---|
| N08800 | 520 | 205 | 30 |
| N08810 | 450 | 170 | 30 |
| N08825 | 586 | 241 | 30 |
Per ASTM B409 and ASTM B424.
Technical data sheets
Dimensions & weights
FAQ
Incoloy 800/800H & 825 Plate: common questions
What is the difference between alloy 800 and 800H?
800H has carbon controlled at 0.05–0.10% and an annealed grain size of ASTM No. 5 or coarser, which give higher creep-rupture strength. 800 is used at lower temperatures.
What is alloy 825 used for?
825 is used for acid service, especially sulphuric and phosphoric acid, and where chloride stress-corrosion cracking is a risk, such as sour oil and gas equipment.
Is Incoloy a grade name?
Incoloy is a trade name. Order plate by UNS number and standard, e.g. UNS N08810 to ASTM B409 or UNS N08825 to ASTM B424. Several mills produce these alloys under their own names.
Does Teshi manufacture Incoloy plate?
No. Teshi Group is a stockist and supplier of Incoloy 800/800H and 825 Plate, sourced from established mills and supplied with the original mill test certificate. Teshi is an OEM manufacturer of flanges, fittings, fasteners, valves and custom fabrications, which can be ordered with it.
Need a size or grade not listed here?
We source against your specification from approved mills, with mill test certificates and inspection before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
Quick RFQ
Quote for Incoloy 800/800H & 825 Plate in 24–48 hours
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