{"id":1548,"date":"2026-09-12T09:34:43","date_gmt":"2026-09-12T09:34:43","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=1548"},"modified":"2026-09-12T09:34:52","modified_gmt":"2026-09-12T09:34:52","slug":"hot-forging-35-steel-at-1100c-heat-resistant-steel-8433-increased-mold-life-from-5000-cycles-to-10000-cycles-blog-307","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=1548","title":{"rendered":"Hot forging 35 steel at 1,100\u00b0C; heat-resistant steel 8433\u00a0increased mold life from 5,000 cycles to 10,000 cycles.blog\u00a0307"},"content":{"rendered":"\n

For hot forging of 35 steel heated to 1100\u00b0C, the heat-resistant steel 8433<\/a><\/strong>\u00a0increased die life from 5,000 to 10,000 cycles. This good news was shared with me yesterday by Mr. Wang, who has been using 8433 for over two years.<\/p>\n\n\n\n

 Mr. Wang specializes in hot forging and stamping of 35 steel, a process with relatively high production speeds. Since 35 steel must be heated to 1100\u00b0C, he previously experienced frequent mold collapse. Believing the hardness was too low, he switched to higher-hardness steels like SKD11 and DC53, but these still were prone to cracking and wear.<\/p>\n\n\n\n

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He then considered applying a PVD coating to the DC53 and SKD11 to improve the dies\u2019 wear resistance. However, even after coating, the dies would develop deep cracks along the cutting edges after producing just 5,000 parts, and there was also surface scuffing. He had always believed that the dies\u2019 low hardness was the cause of the wear. He also tried using high-hardness DC53 and SKD11 and applying PVD surface treatment, but the die life remained short, which left him quite frustrated.<\/p>\n\n\n\n

\u00a0When hot forging professionals encounter die collapse, their first instinct is to increase the hardness of the die steel<\/a><\/strong>\u2014this is their only solution. In fact, this approach is flawed.<\/p>\n\n\n\n

 After Mr. Wang contacted me on September 24, 2024, I observed that his hot forging dies were made from cold work die steel<\/strong>\u2014a material selection error. Given that his hot forging equipment consists of high-speed punch presses\u2014which involve a \u201cclap-like\u201d momentary contact\u2014the die temperature typically reaches 600\u00b0C. You need to select a die steel<\/strong> with a tempering temperature close to 600\u00b0C; this ensures the die\u2019s hardness won\u2019t be easily annealed away, guarantees its red hardness, and prevents die collapse and cracking. I recommended he use heat-resistant steel 8433.<\/p>\n\n\n\n

 8433 is a proprietary heat-resistant steel from Yuhui Mold Steel<\/strong>. It far surpasses competing products in multiple metrics\u2014including high heat resistance, fatigue resistance, and thermal conductivity\u2014and its performance is second to none. The heat resistance and stability of 8433 are 2\u20133 times that of H13, with a hardness of 50\u201354 HRC, and it will not anneal out over its service life. It is particularly worth emphasizing that even if the mold is repaired to the point of being scrapped, the hardness on the back surface will not decrease. We have a customer who hot-forges 42CrMo flanges. Previously, when using H13 to produce 3,000 products, the mold would collapse and crack at the edge. However, after switching to heat-resistant steel 8433, the mold has been reground four times without any reduction in service life, consistently producing over 10,000 products each time.<\/p>\n\n\n\n

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Today, Mr. Wang also told me that when he hot-forges 35 steel at 1,100\u00b0C using 8433 die steel<\/a><\/strong>, the service life has remained stable at 10,000 cycles over the past two years, and he is very satisfied with the results. Compared to the high-hardness DC53 and SKD11 steels he used previously\u2014which were even PVD-coated\u2014the service life has doubled. He\u2019s very pleased, and today he came to consult me on material selection for another new product. After our conversation, I received this good news, and I\u2019m actually quite happy about it too.<\/p>\n\n\n\n

 Withstanding the heat of 1100\u00b0C and enduring two years of testing, the fact that 8433\u2019s service life has remained stable at 10,000 cycles demonstrates its excellent heat resistance and stability. It clearly meets the high heat resistance requirements of hot forging dies, and a service life of 10,000 cycles\u2014compared to the previous 3,000\u20135,000 cycles\u2014represents a doubling of lifespan. I\u2019m truly delighted that our product can help customers solve problems, extend service life, and improve production efficiency.<\/p>\n\n\n\n

 When it comes to hot forging dies prone to collapse and cracking, using 8433 die steel<\/strong> is even more satisfying than eating braised pork! If your hot forging dies are also experiencing collapse or cracking, you should definitely give 8433 die steel a try.<\/p>\n\n\n\n

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

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

For hot forging of 35 steel heated to 1100\u00b0C, the heat-resistant steel 8433\u00a0increased die life from 5,000 to 10,000 cycles. This good news was shared with me yesterday by Mr. Wang, who has been using 8433 for over two years.  Mr. Wang specializes in hot forging and stamping of 35 steel, a process with relatively […]<\/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-1548","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