<p>I am looking for the temperature rating for hardboard. I want to use that as the base for my printer enclosure. </p>

<p>It has proven incredible hard get a ball-park figure from Google. </p>

<p>So, what is the maximum safe temperature for a hardboard panel at long term? (considering a print job can easily take 6 hours).</p>

<p>PS: if you have used a hardboard to build your enclosure, your experience might be helpful.</p>

[{'answer_id': 8398, 'author': 'Pᴀᴜʟsᴛᴇʀ2', 'author_id': 11242, 'author_profile': 'https://3dprinting.stackexchange.com/users/11242', 'pm_score': 4, 'selected': True, 'text': '<p>Hardboard is called <em>Masonite</em> here in the States because that is the trade name of the product. If you look up the <a href="http://www.gunnersens.co.nz/images/stories/products/Masonite%20Standard/specs/Australian_Hardboards_Masonite_MSDS.pdf" rel="noreferrer">Material Safety Data Sheet</a> you will see Masonite it states the following (Section 5):</p>\n\n<blockquote>\n  <p>Auto-ignition Temperature (°C): >200 degrees Celsius</p>\n</blockquote>\n\n<p>In Section 7, it states:</p>\n\n<blockquote>\n  <p>These boards are flammable but difficult to ignite.</p>\n</blockquote>\n\n<p>Furthermore in Section 10, it states:</p>\n\n<blockquote>\n  <p><strong>Conditions to avoid:</strong> Avoid sources of radiant heat and flame; and avoid sparks and sources of ignition in all electrical equipment, including dust extraction equipment.\n  Avoid excessive build up of dust from boards.</p>\n</blockquote>\n\n<p>The hot end works of printers are neither radiant heat, nor flames, nor sparks. Yes, you\'ll have a buildup of heat within the working confines of an enclosure, but if you are only using it for a base there should be absolutely no issues. If you were to build an entire enclosure from hardboard, you could put a thermal probe inside with the printer to ensure it doesn\'t get too hot, but realistically, it will never get hot enough within the enclosure to light the hardboard on fire.</p>\n'}, {'answer_id': 8400, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 2, 'selected': False, 'text': '<p>Masonite or hardboard is a high-density board without a resin. It is <a href="https://www.chromaluxe.com/wp-content/uploads/SDS-Hardboard-Universal-Woods.pdf" rel="nofollow noreferrer">listed</a> at around 200 to 275\xa0°C for its autoignition temperature. Just for comparison, let\'s look at similar products.</p>\n<p>Medium-density fiberboard (MDF) is similar to hardboard but bonded with a resin, offering a smoother surface and is <a href="https://www.westfraser.com/sites/default/files/products/MDF/WP-GoldPlus%202013.pdf" rel="nofollow noreferrer">listed</a> at 200 to 275\xa0°C, so pretty close.</p>\n<p>The heavier High-density fiberboard variant is <a href="http://www.clarionindustries.com/assets/files/Clarion-msds-hdf.pdf" rel="nofollow noreferrer">listed</a> with about the same temperatures of about 200 to 275\xa0°C.</p>\n<p>Oriented Strand Board (OSB) is <a href="http://www.langboard.com/osb/data/osb_msds.pdf" rel="nofollow noreferrer">listed</a> at 200 to 260\xa0°C.</p>\n<h2>Conclusion</h2>\n<p>All the materials have very similar autoignition temperatures, so none of them particularly shines over the other. Using a proper fire safety procedure is highly encouraged, even though the ambient temperature in the enclosure should not reach even close to the 200\xa0°C unless the printer has a freak accident and catches fire itself.</p>\n<ul>\n<li>A smoke detector is a must.</li>\n<li>Some kind of cooling method that keeps the inside at a temperature down is highly encouraged. A simple temperature activated fan might help in this.</li>\n<li>Lining the inside of the box with a thicker aluminium or copper tape can help to even out the temperature over the surfaces faster, preventing the formation of hotspots that might otherwise reach dangerous temperatures. <a href="https://uk.rs-online.com/web/c/adhesives-sealants-tapes/tapes/copper-tapes/" rel="nofollow noreferrer">Copper tapes</a> are more expensive than <a href="https://uk.rs-online.com/web/c/adhesives-sealants-tapes/tapes/aluminium-tapes/" rel="nofollow noreferrer">Aluminium tapes</a> but have a better heat transfer coefficient.<sup>1</sup></li>\n<li>Including an automatic fire suppression system could be an option.</li>\n</ul>\n<p><sup>1 - The RS Catalogue was just chosen for ease of navigation. <a href="https://www.mcmaster.com/" rel="nofollow noreferrer">McMaster Carr</a> does list special <a href="https://www.mcmaster.com/catalog/125/3591" rel="nofollow noreferrer">heat shielding tape</a> in both thin and aluminium as well as <a href="https://www.mcmaster.com/catalog/125/3587" rel="nofollow noreferrer">copper and aluminium foil</a> tapes. I am not affiliated to either.</sup></p>\n'}]
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