ASTM B163 Nickel Alloy tube seamless tube Monel 400 Heat Exchanger Condenser Application
ASTM B163 Nickel Alloy tube seamless tube Monel 400 Heat Exchanger Condenser Application
Alloy 800 is an iron-nickel-chromium alloy with moderate strength and good resistance to oxidation and carburization at elevated temperatures. It is particularly useful for high-temperature equipment in the petrochemical industry because the alloy doesn't form the embrittling sigma phase after long time exposure at 1200°F (649°C). Excellent resistance to chloride stress-corrosion cracking is another important feature of alloy 800.
Alloy 800H is a solution heat treated (2100°F/1150°C), controlled-carbon version of alloy 800 with improved elevated temperature properties. It has improved creep and stress-rupture characteristics in the 1100°F (593°C) to 1800°F (982°C) temperature range.
Applications
Typical applications for alloy 800 and 800H are - Heat exchangers and process piping; carburizing fixtures and retorts; furnace components; electric range heating-element sheathing; extruded tubing for ethylene and steam methane reforming furnaces; ammonia effluent coolers.
Physical Properties
The following table discusses the physical properties of INCOLOY alloy 800.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.94 gm/cm3 | 0.287 lb/in3 |
Mechanical Properties
The mechanical properties of INCOLOY alloy 800 are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength(annealed) | 600 MPa | 87 ksi |
| Yield strength(annealed) | 275 MPa | 39.9 ksi |
| Elongation at Break | 45% | 45% |
Other Designations
Some of the designations used to denote INCOLOY alloy 800 are listed below:
| UNS N08800 | AMS 5766 | AMS 5871 | ASTM B163 | ASTM B366 |
| ASTM B407 | ASTM B408 | ASTM B409 | ASTM B514 | ASTM B515 |
| ASTM B564 | DIN 1.4876 |
| Incoloy | Incoloy 800 | Incoloy 800H | ||
| Element | Min | Max | Min | Max |
| Nickel + Cobalt | 30.0 | 35.0 | 30.0 | 35.0 |
| Cobalt | --- | 2.00 | --- | 2.00 |
| Chromium | 19.0 | 23.0 | 19.0 | 23.0 |
| Copper | --- | 0.75 | --- | 0.75 |
| Iron | Bal | Bal | ||
| Silicon | --- | 1.00 | --- | 1.00 |
| Manganese | --- | 1.50 | --- | 1.50 |
| Carbon | --- | 0.10 | 0.05 | 0.10 |
| Aluminum | 0.15 | 0.60 | 0.15 | 0.60 |
| Titanium | 0.15 | 0.60 | 0.15 | 0.60 |
| Sulfur | --- | 0.015 | --- | 0.015 |
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| Form and Condition | Tensile Strength | Yield Strength (0.2% Offset) | Elongation, % | Hardness, Rockwell | ||
| ksi | Mpa | Ksi | Mpa | |||
| Wire | ||||||
| cold drawn | ||||||
| Annealed | 80-120 | 550-830 | 35-75 | 240-520 | 45-20 | - |
| No. 1 Temper | 105-135 | 725-930 | 70-105 | 480-725 | 35-15 | - |
| Spring Temper | 170-220 | 1170-1520 | 150-210 | 1035-1450 | 5-2 | |
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