БЕЗШОВНА ТРУБА ЗІ СПЛАВУ-800

<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">This modification was to control carbon (.05-.10%) and grain size to optimize stress rupture properties. Incoloy 800HT has further modifications to the combined titanium and aluminum levels (.85-1.20%) to ensure optimum high temperature properties.The nickel alloy is dual certified (800H/HT) and combines the properties of both forms. Incoloy 800H/HT alloy was intended for high temperature structural applications. The nickel content makes the alloys highly resistant to both chloride stress-corrosion cracking and to embrittlement from precipitation of sigma phase. The general corrosion resistance is excellent. In the solution annealed condition, alloys 800H and 800HT have superior creep and stress rupture properties. Today, most suppliers, including Mega Mex, only carry the dual certified 800H/HT alloy.</span><span style="font-size:12.0pt"><o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal">&nbsp;</p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">Incoloy 800 is primarily used in applications with temperatures up to 1100° F, where alloys 800H and 800HT are normally used in temperatures above 1100° F where resistance to creep and rupture is required. The chemical balance allows the nickel steel alloy to exhibit excellent resistance to carburization, oxidation and nit riding atmospheres. Incoloy 800HT will not become embrittled even after long periods of usage in the 1200-1600° F range where many stainless steels become brittle. Excellent cold forming characteristics typically associated with the nickel chromium alloys are exhibited with 800HT. When cold formed extensively the grain size produces a visibly undulated surface called “orange peel”. Incoloy 800HT can be welded by the common techniques used on stainless steels<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;"><b>In what applications is Incoloy 800H/HT used?</b><o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;"><o:p>&nbsp;</o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Ethylene furnace quench boilers<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Hydrocarbon cracking<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Valves, fittings and other components exposed to corrosive attack from 1100-1800° F<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Industrial furnaces<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Heat-treating equipment<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Chemical and petrochemical processing<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Super-heater and re-heaters in power plants<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Pressure vessels<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;">• Heat&nbsp;<o:p></o:p>exchanges</span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height: normal"><span style="font-size:18px;"><o:p>&nbsp;</o:p></span></p> <p><span style="font-size:18px;"><font face="Calibri, sans-serif">Alloys 800H/HT are used in a variety of applications involving exposure to corrosive environments and high temperatures such as heat treating equipment, chemical and petrochemical processing, nuclear power plants and the paper pulp industry. Heat-treating equipment such as baskets, trays, and fixtures employ Incoloy 800H/HT. Chemical and petrochemical processing industries use the alloys for heat exchanges&nbsp;and other piping.&nbsp;</font><span style="font-family: Calibri, sans-serif;">systems in nitric acid media especially where resistance to chloride stress-corrosion cracking is required. Power plants use them for super-heater and re-heater tubing.</span></span></p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p>