{"id":396,"date":"2026-04-03T09:43:19","date_gmt":"2026-04-03T09:43:19","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=396"},"modified":"2026-04-03T09:49:12","modified_gmt":"2026-04-03T09:49:12","slug":"punch-7-holes-on-8mm-45-steel-skh51-needle-breaks-after-a-few-hundred-punches-blog-074","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=396","title":{"rendered":"Punch 7 holes on 8mm 45 steel, SKH51 needle breaks after a few hundred punches.blog\u00a0074"},"content":{"rendered":"\n

Mr. Mao inquired about punching 7 holes on 8mm thick 45 steel. The current SKH51 punching needle is prone to breakage after punching hundreds of holes. What tool steel<\/strong> should be used?<\/p>\n\n\n\n

Punch 7 holes on 8mm 45 steel, which is a harsh working condition where the punching hole diameter is smaller than the plate thickness and the punching ratio is less than 1:1. The anti cracking performance of the tool steel<\/a><\/strong>\u00a0is extremely high, and no tool steel<\/strong>\u00a0can withstand this working condition. Only 8566 anti collapse steel can be used, otherwise it will break.<\/p>\n\n\n\n

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 SKH51 is a tungsten containing high-speed steel with a hardness of HRC62-64. It has good wear resistance, but it is too brittle to be used in harsh working conditions where the punching hole diameter is smaller than the plate thickness. It breaks after hundreds of punches, which also verifies that SKH51 is not suitable.<\/p>\n\n\n\n

8566 is a proprietary anti collapse steel developed by Yuhui tool<\/strong> Steel<\/strong>, which mainly solves the problem of mold cracking; It has accumulated over a thousand cases in 5 working conditions, 6 major materials, and 7 major fields of stamping.<\/p>\n\n\n\n

The anti cracking performance of 8566 is four times that of high-speed steel SKH-9 and twice that of D2, with a hardness of HRC58-60. It can solve the cracking problem that high hardness mold steels such as D2, DC53, and SKH-9 cannot solve; Especially in harsh working conditions such as stainless steel stamping, sharp corner stamping, narrow edge stamping, and even stamping holes smaller than the plate thickness with a stamping ratio of less than 1:1, the cracking that cannot be solved by conventional tool<\/strong> steel<\/strong> is solved by using 8566 anti collapse steel.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u00a0Mr. He said, “I used 8566 die steel<\/a><\/strong>\u00a0to punch a 4.5 hole in an 8mm round rod and succeeded<\/p>\n\n\n\n

Mr. He’s previous hole could not be punched because the punching needle always broke, so it could only be drilled with a drilling machine. However, more than one million holes are drilled manually every year, which is costly and inefficient. Now, with the stamping production achieved with 8566, it is easy and efficient, so Mr. He is very excited.<\/p>\n\n\n\n

Mr. Mao punched 7 holes on 8mm 45 steel, but SKH51 needle broke after punching hundreds of holes. This is the wrong material used. You need to use 8566 anti collapse steel. The use of 8566 die steel<\/strong> for punch cracking is a double-edged sword in both old and new societies.<\/p>\n\n\n\n

*********<\/p>\n\n\n\n

Wu Dejian tool<\/strong> Steel<\/strong> is the user’s chief of staff and everyone who has used it buys it.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mr. Mao inquired about punching 7 holes on 8mm thick 45 steel. The current SKH51 punching needle is prone to breakage after punching hundreds of holes. What tool steel should be used? Punch 7 holes on 8mm 45 steel, which is a harsh working condition where the punching hole diameter is smaller than the plate thickness […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-396","post","type-post","status-publish","format-standard","hentry","category-blog"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts\/396","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=396"}],"version-history":[{"count":1,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts\/396\/revisions"}],"predecessor-version":[{"id":399,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts\/396\/revisions\/399"}],"wp:attachment":[{"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=396"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=396"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=396"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}