The heat resistance and stability of 8433 are 2\u20133 times that of H13, with a hardness of 50\u201354 HRC. It won\u2019t anneal out over its service life, ensuring reliable red hardness. Most importantly, even if you repair the die until it\u2019s worn out, the hardness on the back surface won\u2019t decrease.<\/p>\n\n\n\n We have a customer who hot-forges 42CrMo flanges. Their original mold used H13, and the mouth area would collapse and crack after just 3,000 cycles. However, after switching to heat-resistant steel 8433, they only had to resurface the mold four times without any reduction in service life\u2014each mold lasted over 10,000 cycles, which is three times the lifespan of H13. As Mr. Xin put it, \u201cOne of your molds is equivalent to four of our original H13 molds.\u201d<\/p>\n\n\n\n While H13 is indeed inexpensive for hot-work dies, its heat resistance is simply too poor. It is a 4Cr5MoSiV1 alloy with an insufficient molybdenum content. During use, the die\u2019s hardness is annealed out. Once this happens, its red hardness and resistance to thermal wear are lost, leading to die collapse and cracking. Furthermore, with H13, the entire die is annealed. A new die might last for 1,000 strokes, but after one surface reduction, that drops to 600 strokes; after another reduction, it drops to 300 strokes\u2014at which point die repair becomes pointless. However, with 8433 heat-resistant steel, even after four surface reductions, the service life remains unchanged.<\/p>\n\n\n\n If you\u2019re currently using H13 for your hot forging dies and are experiencing short service life and constant repairs\u2014which you can no longer afford\u2014and you want longer-lasting dies to achieve high efficiency, extended service life, and low-cost operation, then you should try 8433. Its heat resistance and stability are 2\u20133 times that of H13, with a hardness of 50\u201354 HRC. It will not anneal out over its service life, ensuring stability\u2014even if you repair the die until it\u2019s scrapped, the hardness on the back surface will not decrease. Especially in terms of high heat resistance, high toughness, and high thermal conductivity, 8433\u2019s performance far surpasses that of competing products.<\/p>\n\n\n\n When it comes to preventing die collapse and cracking in hot forging dies, using 8433 die steel is even more satisfying than eating braised pork!<\/p>\n\n\n\n *************<\/p>\n\n\n\n![\"\"](\"https:\/\/www.wudejiansteel.com\/wp-content\/uploads\/2026\/08\/\u81f3\u7cbe\u7cbe\u5bc6-4\u4ef6\u8010\u70ed\u94a28433.jpg\")
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