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What alloy and heat treatment was used for Girdraulics? 2
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<blockquote data-quote="Martyn Goodwin" data-source="post: 47592" data-attributes="member: 2433"><p>The following has been reproduced from the December 2013 edition of 998, with the approval of the editor of 998.</p><p></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'">If you ever find yourself with bent Girdraulic fork blades that require straightening you might be interested in the following information provided by Dave Large, of the Victoria Section.</span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'">“The fork blades, part FF40 are made from L40 alloy material which is an old British specification superseded by HE15 which is similar to AS1866-1977 grade 2014.</span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'">For straightening or welding first anneal at 360 to 400 degrees centigrade. Solution heat treat at 505 to 515 degrees centigrade for 2 hours. Quench in boiling water then straighten within 30 minutes.</span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'">Precipitation harden at 155 to 185 degrees centigrade for 5 hours and furnace cool. This will restore the original hardness of 72 Rockwell B.”</span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'"></span></span></p><p><span style="font-size: 12px"><span style="font-family: 'book antiqua'">Dave bolted both of his blades together for the process and did not have any problems with distortion.</span></span></p></blockquote><p></p>
[QUOTE="Martyn Goodwin, post: 47592, member: 2433"] The following has been reproduced from the December 2013 edition of 998, with the approval of the editor of 998. [SIZE=3][FONT=book antiqua]If you ever find yourself with bent Girdraulic fork blades that require straightening you might be interested in the following information provided by Dave Large, of the Victoria Section. [/FONT][/SIZE] [SIZE=3][FONT=book antiqua]“The fork blades, part FF40 are made from L40 alloy material which is an old British specification superseded by HE15 which is similar to AS1866-1977 grade 2014. [/FONT][/SIZE] [SIZE=3][FONT=book antiqua]For straightening or welding first anneal at 360 to 400 degrees centigrade. Solution heat treat at 505 to 515 degrees centigrade for 2 hours. Quench in boiling water then straighten within 30 minutes. [/FONT][/SIZE] [SIZE=3][FONT=book antiqua]Precipitation harden at 155 to 185 degrees centigrade for 5 hours and furnace cool. This will restore the original hardness of 72 Rockwell B.” [/FONT][/SIZE] [SIZE=3][FONT=book antiqua]Dave bolted both of his blades together for the process and did not have any problems with distortion.[/FONT][/SIZE] [/QUOTE]
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What alloy and heat treatment was used for Girdraulics? 2
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