{"id":1115,"date":"2026-07-10T09:45:07","date_gmt":"2026-07-10T09:45:07","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=1115"},"modified":"2026-07-10T09:45:08","modified_gmt":"2026-07-10T09:45:08","slug":"mr-zhong-reported-that-when-using-nylon-with-30-glass-fiber-reinforcement-and-h13-and-skd61-mold-steel-flash-began-to-appear-after-producing-over-100000-units-blog-220","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=1115","title":{"rendered":"Mr. Zhong reported that when using nylon with 30% glass fiber reinforcement and H13 and SKD61 mold steel, flash began to appear after producing over 100,000 units.blog\u00a0220"},"content":{"rendered":"\n

A customer just came in to purchase 8503 mold steel<\/a><\/strong>\u00a0for a non-stick application\u2014nylon with 30% glass fiber\u2014with a requirement of 1 million cycles.<\/p>\n\n\n\n

 The original molds used H13<\/strong> and SKD61, but they started developing flash after producing just over 100,000 parts; this problem has been an ongoing issue for quite some time.<\/p>\n\n\n\n

\u00a0Mr. Zhong\u2019s feedback once again demonstrates that H13 and SKD61<\/a><\/strong>\u2014these medium-carbon hot-work die steels\u2014are too hard and have too poor wear resistance to be relied upon for molds used with nylon reinforced with 30% glass fiber; they can only be used as a stopgap measure.<\/p>\n\n\n\n

 His feedback is consistent with reports from other users, who generally report that flash begins to appear at this production volume.<\/p>\n\n\n\n

 Both H13 and SKD61 are medium-carbon steels with a carbon content of 0.38% and a hardness of HRC 50. While they offer good toughness, their wear resistance is too poor to withstand the erosion caused by 30% glass-filled plastic, making the molds prone to flash.<\/p>\n\n\n\n

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

 For nylon + 30% GF, I still recommend the non-stick 8503 mold steel<\/strong>.<\/p>\n\n\n\n

 8503 is a proprietary non-stick mold steel developed by Wudejian Mold Steel. It has twice the toughness of DC53 and a hardness of 55\u201361 HRC. Compared to DC53, its performance is doubled without a corresponding increase in price, and it offers the added benefit of being non-stick.<\/p>\n\n\n\n

 In particular, this non-stick property, combined with its high hardness, is the fundamental and effective solution to the problem of molds used for high-glass-fiber-content materials\u2014which are prone to being worn down, leading to flash on the product and surface roughness on the mold.<\/p>\n\n\n\n

 Mr. Yu from Ningbo said: \u201cUsing 8503 mold steel <\/strong>for glass-fiber-reinforced molds is really great\u2014it can run continuously without any flash!\u201d Boss Wan said that 8503 can withstand 1 million cycles with nylon + 30% glass fiber compound.<\/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":"

A customer just came in to purchase 8503 mold steel\u00a0for a non-stick application\u2014nylon with 30% glass fiber\u2014with a requirement of 1 million cycles.  The original molds used H13 and SKD61, but they started developing flash after producing just over 100,000 parts; this problem has been an ongoing issue for quite some time. \u00a0Mr. Zhong\u2019s feedback once […]<\/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-1115","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