Kanakratna steelage is a renowned exporter, manufacturer, stockist, supplier, and stockholder of high-quality Inconel Alloy Seamless Tubes. These nickel-chromium alloy tubes are celebrated for their exceptional resistance to oxidation and corrosion at high temperatures, making them ideal for aerospace, chemical processing, power generation, and oil and gas applications. Inconel alloy tubes maintain their strength and stability across a wide temperature range and offer excellent weldability and ease of fabrication, ensuring reliable performance in the most demanding environments.
Alloy 800, 800H, and 800HT are nickel-iron-chromium alloys with good strength and excellent resistance to oxidation and carburization in high-temperature exposure. These nickel steel alloys are identical except for the higher level of carbon in alloy 800H/HT and the addition of up to 1.20 percent aluminium and titanium in alloy 800HT. Alloy 800 was the first of these alloys and it was slightly modified into Alloy 800H. This modification was to control carbon (.05-.10%) and grain size to optimize stress rupture properties.
In heat treatment applications Alloy 800HT has further modifications to the combined titanium and aluminium levels (.85-1.20%) to ensure optimum high temperature properties. Alloy 800H/HT was intended for high temperature structural applications. The nickel content makes the alloys highly resistant to both carborisation and to embrittlement from precipitation of sigma phase.
Technical Specifications
| CHEMICAL COMPOSITION (% by weight) | ||||
|---|---|---|---|---|
| 800 | 800H/HT | |||
| Element | Min | Max | Min | Max |
| Ni | 30 | 35 | 30 | 35 |
| Fe | - | 39.5 | - | 39.5 |
| Cr | 19 | 23 | 19 | 23 |
| Cu | - | 0.75 | - | 0.75 |
| Ti | 0.15 | 0.6 | 0.25 | 0.6 |
| Al | 0.15 | 0.6 | 0.15 | 0.6 |
| C | - | 0.1 | 0.06 | 0.1 |
| Mn | - | 1.5 | - | 1.5 |
| S | - | 0.015 | - | 0.015 |
| Si | - | 1.0 | - | 1.0 |
| MECHANICAL PROPERTIES | ||||
|---|---|---|---|---|
| Temper | 800 | 800H/HT | ||
| Tensile Rm | 77.8 | ksi (min) | 65 | ksi (min) |
| Tensile Rm | 536 | MPa (min) | 448 | MPa (min) |
| R.p. 0.2% Yield | 22 | ksi (min) | 25 | ksi (min) |
| R.p. 0.2% Yield | 150 | MPa (min) | 172 | MPa (min) |
| Elongation (2” or 4D gl) | 20 | % (min) | 20 | % (min) |
| PHYSICAL PROPERTIES (Room Temperature) | ||
|---|---|---|
| Specific Heat (0-100°C) | 460 | J.kg-1.°K-1 |
| Thermal Conductivity | 11.5 | W.m -1.°K-1 |
| Thermal Expansion | 14.4 | mm/m/°C |
| Modulus Elasticity | 208 | GPa |
| Electrical Resistivity | 9.89 | Ohm-cm |
| Density | 7.94 | g/cm3 |