{"id":1146,"date":"2026-07-14T09:25:52","date_gmt":"2026-07-14T09:25:52","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=1146"},"modified":"2026-07-14T09:25:54","modified_gmt":"2026-07-14T09:25:54","slug":"automotive-connector-pins-we-tested-six-types-of-mold-steel-but-they-all-broke-easily-blog-227","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=1146","title":{"rendered":"Automotive connector pins: We tested six types of mold steel, but they all broke easily.blog\u00a0227"},"content":{"rendered":"\n

Mr. Liu contacted me to inquire about a high-strength, high-toughness steel. For small cores in injection molds for automotive connectors, we typically use various mold steels such as SKD61, SKD11, DC53, ASP23, VIKING, UNIMAX, and others. The part dimensions are 3 \u00d7 4 \u00d7 72; since the part is so small, it\u2019s prone to breaking.<\/p>\n\n\n\n

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 It\u2019s just a small part\u2014you\u2019ve tried six different types of die steel, including high-toughness and high-hardness grades, but it still breaks.<\/p>\n\n\n\n

 It\u2019s a small part measuring 3\u00d74\u00d772\u2014it doesn\u2019t use much mold steel, but the machining costs far exceed the material costs. If you don\u2019t use the right mold steel<\/strong>, you\u2019re definitely wasting money.<\/p>\n\n\n\n

\u00a0Many of the properties of mold steel<\/a><\/strong>\u00a0are determined by the quality of the smelting process, not by the alloy composition. This is why so many people end up with mold steel<\/strong>\u00a0of the correct grade but with the wrong properties.<\/p>\n\n\n\n

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 For the small pins in connectors, I recommend high-toughness LG <\/strong>mold<\/strong> steel<\/strong>. Mr. Yu said that LG mold steel<\/strong> offers both hardness and toughness. The heat-treated hard grade with a Rockwell hardness of 60H is so tough that even the scrap left over from wire cutting won\u2019t break when bent 180 degrees; it even springs back after the force is released. LG steel combines toughness with rigidity, and it\u2019s been snapped up by a group of friends who make plastic molds. It works very well for wire-cutting slender pins.<\/p>\n\n\n\n

\u00a0Mr. Chen\u2019s piercing pins used to break easily; whether he used 8407 or SKH51, they would snap. Both sets of molds would break alternately, and his mold operating conditions were similar to Mr. Liu\u2019s. But now that he\u2019s been using high-toughness LG mold\u00a0steel<\/a><\/strong>\u00a0for a month, there haven\u2019t been any breaks. Mr. Chen praised Mr. Wu, saying, \u201cLast time I bought a small piece of scrap material to make an insert; it\u2019s been in use for a month, and it\u2019s still working fine.\u201d<\/p>\n\n\n\n

 *************<\/p>\n\n\n\n

Wu Dejian’s\u00a0tool\u00a0steel<\/a><\/strong>, the chief of staff of the user, bought everything he had used.<\/p>\n","protected":false},"excerpt":{"rendered":"

Mr. Liu contacted me to inquire about a high-strength, high-toughness steel. For small cores in injection molds for automotive connectors, we typically use various mold steels such as SKD61, SKD11, DC53, ASP23, VIKING, UNIMAX, and others. The part dimensions are 3 \u00d7 4 \u00d7 72; since the part is so small, it\u2019s prone to breaking. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1146","post","type-post","status-publish","format-standard","hentry","category-blog"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t