Incoloy® 800 / 800H / 800HT
Incoloy 800 series alloys are nickel-iron-chromium superalloys designed for high-strength and resistance to oxidation and carburization at elevated temperatures. The alloy structure remains stable even after long-term exposure to high heat.
- 一般的なフォーム： Seamless Pipe, Welded Tube, Plate, Sheet, Round Bar, Wire, Fittings.
- 主な特徴 Excellent resistance to chloride-ion stress-corrosion cracking.
- Temperature Range: Up to 1100°F (595°C) for Alloy 800; Above 1100°F for 800H/HT.
- Stock Status: Available in stock (Standard sizes) & Custom Forging.
While all three grades share the same basic chemical composition, the differences lie in the Carbon, Aluminum, and Titanium content, and the annealing process used. These differences determine the alloy's creep rupture strength.
インコロイ800（UNS N08800）
Carbon: 0.10% max
Annealing: 980-1040°C
General purpose grade. Used for applications up to 1100°F (595°C) where high ductility and corrosion resistance are required.
インコロイ800H (UNS N08810)
Carbon: 0.05 - 0.10%
Annealing: 1150-1200°C
Solution annealed with controlled carbon for significantly higher creep-rupture strength. Designed for temps above 1100°F.
インコロイ800HT (UNS N08811)
Carbon: 0.06 - 0.10%
Al + Ti: 0.85 - 1.20%
The strongest of the series. The specific addition of Titanium and Aluminum ensures maximum high-temperature structural integrity.
| エレメント | インコロイ800 | インコロイ800H | Incoloy 800HT |
|---|---|---|---|
| ニッケル（Ni） | 30.0 - 35.0 | 30.0 - 35.0 | 30.0 - 35.0 |
| クロム（Cr） | 19.0 - 23.0 | 19.0 - 23.0 | 19.0 - 23.0 |
| 鉄（Fe） | 39.5 min (Balance) | 39.5 min (Balance) | 39.5 min (Balance) |
| カーボン（C） | 最大0.10 | 0.05 - 0.10 | 0.06 - 0.10 |
| Aluminum + Titanium | 0.30 - 1.20 | 0.30 - 1.20 | 0.85 - 1.20 |
| 製品形態 | ASTM/ASME規格 |
|---|---|
| パイプ＆チューブ（シームレス） | ASTM B407, ASME SB407 |
| パイプ＆チューブ（溶接） | ASTM B154, ASTM B515, ASME SB515 |
| プレート、シート、ストリップ | ASTM B409, ASME SB409 |
| バー＆ロッド | ASTM B408, ASME SB408 |
| 付属品 | ASMB366、ASME SB366 |
| 鍛造品 | ASMB564、ASME SB564 |
| プロパティ | Alloy 800 (Annealed) | Alloy 800H / 800HT (Solution Annealed) |
|---|---|---|
| Tensile Strength (ksi / MPa) | 75 (520) min | 65 (450) min |
| Yield Strength 0.2% Offset (ksi / MPa) | 30 (205) min | 25 (170) min |
| Elongation (%) | 30%分 | 30%分 |
*Note: Alloy 800H/HT have slightly lower room-temperature strength due to the high-temperature solution anneal treatment, which maximizes creep properties at high heat.
Petrochemical Processing
Ethylene furnace quench boilers, hydrocarbon cracking, and pigtails/headers.
Heat Treating Equipment
Radiant tubes, muffles, retorts, and fixtures exposed to high furnace temperatures.
発電
Superheater and reheater tubing in fossil fuel plants; heat exchangers in nuclear reactors.
Industrial Sheathing
Sheathing for electric heating elements due to good electrical resistance.
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