{"id":150,"date":"2026-02-24T08:51:21","date_gmt":"2026-02-24T08:51:21","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=150"},"modified":"2026-02-24T08:51:22","modified_gmt":"2026-02-24T08:51:22","slug":"the-hardness-of-cr12mov-for-powder-metallurgy-molds-has-been-reduced-to-30-degrees-and-it-finally-does-not-crack-but-it-is-not-wear-resistant-anymore-chapter-568","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=150","title":{"rendered":"The hardness of Cr12MoV for powder metallurgy molds has been reduced to 30 degrees, and it finally does not crack, but it is not wear-resistant anymore. Chapter 568"},"content":{"rendered":"\n

Today, a customer who works in powder metallurgy came to me. His mold has cracked and is no longer wear-resistant. He asked what kind of die steel<\/strong>\u00a0should be used for powder metallurgy molds?<\/p>\n\n\n\n

After a detailed conversation, he learned that his bottom mold is now made of Cr12MoV, which is prone to cracking when the hardness is 58-60HRC. He lowered the hardness all the way, and now the hardness has decreased to 30HRC. Finally, it does not crack, but it is not wear-resistant anymore. The mold is prone to wear and the product is prone to burrs. He doesn’t know what to do.<\/p>\n\n\n\n

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Upon hearing this news, I was both angry and amused. The mold maker’s solution to cracking the mold was to reduce its hardness until it stopped cracking. This method is simple and easy to use, and doesn’t require any mental effort.<\/p>\n\n\n\n

But I also wonder, if your mold only requires a hardness of 30HRC, then you don’t need to use Cr12MoV. You can use 45 steel, which is cheaper and has better toughness.<\/p>\n\n\n\n

Your mold has a hardness of only 30HRC, so there is no need for heat treatment. You can directly use P20 pre hardened material with a hardness of 33HRC. The mold can be processed and formed in one go, and the processing cost is also low. It also saves heat treatment costs, and there is no need to worry about cracking problems. The price is also cheap. Why use Cr12MoV+quenching, precision machining, and heat treatment fees? It’s so troublesome.<\/p>\n\n\n\n

If reducing hardness can solve the problem of mold cracking, scientists do not need to study 750 types of die steel<\/a><\/strong>. You don’t even know how to communicate with this god who doesn’t understand mold steel and has to operate recklessly.<\/p>\n\n\n\n

Speaking of which, what kind of die steel<\/strong>\u00a0is used for powder metallurgy molds that does not crack and is also very wear-resistant?<\/p>\n\n\n\n

Any product formed by powder metallurgy has a complex structure and requires high toughness for the mold; After all, powder forming is solid powder forming, which requires high wear resistance of the mold. High hardness and high wear resistance die steel<\/strong>\u00a0must be used, while also having non stick material properties. Here, I recommend the non stick 8503 die steel<\/strong>.<\/p>\n\n\n\n

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8503 is a non stick die steel<\/strong>\u00a0exclusive to Wu Dejian tool Steel<\/a><\/strong>, with a hardness of 55-61HRC and a fracture resistance twice that of DC53. However, compared with DC53, its performance doubles, the price does not double, and it also has the advantage of non stick material. Especially the characteristic of non stick material is the fundamental and effective solution to eradicate the problem of mold being eaten, causing the product to run and become rough, and the mold to become rough.<\/p>\n\n\n\n

Mr. Zhou’s powder metallurgy molds suffer from severe erosion, making them easy to eat and causing the products to lose their sharpness. CALDIE, Hitachi’s YXR33, and HAP5R, which have all been tested, have all had short mold lifespans.<\/p>\n\n\n\n

But Mr. Zhou’s powder metallurgy molds use 8503 die steel<\/strong>, which can be produced for 3 months without mold repair. Compared with CALDIE from Yishengbai, Hitachi’s YXR33 and HAP5R, 8503 die steel<\/strong>\u00a0has the longest lifespan and the cheapest price.<\/p>\n\n\n\n

The netizen’s powder metallurgy mold is made of Cr12MoV, with a hardness reduced to 30HRC. Although it does not crack, it is prone to wear and cannot be used. I recommend you try the non stick 8503 die<\/strong> steel<\/strong>, with a hardness of 55-56HRC. The mold is not cracked, wear-resistant, and non stick, with a long service life.<\/p>\n\n\n\n

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

I am Wu Dejian, the king of die\u00a0steel<\/strong>, from Dongguan Yuhui Tool\u00a0Steel<\/strong>. Yuhui Tool\u00a0Steel<\/strong>\u00a0is used by 3 Fortune 500 companies, and Kyocera has been purchasing Yuhui Tool\u00a0Steel<\/strong>\u00a0for 7 consecutive years. I have solved the difficult problems of mold material selection, production, and use for more than 4,000 enterprises. If you are hesitant when choosing die\u00a0steel<\/strong>, or if the\u00a0die\u00a0steel<\/strong>\u00a0you are currently using has a short service life, and you don’t know which material to use, welcome to come to me. I believe that in this regard, I can be your chief of staff and help you save money. Wu Dejian Tool\u00a0Steel<\/strong>, the chief of staff of users, is well-received by those who have used it!<\/p>\n","protected":false},"excerpt":{"rendered":"

Today, a customer who works in powder metallurgy came to me. His mold has cracked and is no longer wear-resistant. He asked what kind of die steel\u00a0should be used for powder metallurgy molds? After a detailed conversation, he learned that his bottom mold is now made of Cr12MoV, which is prone to cracking when the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-150","post","type-post","status-publish","format-standard","hentry","category-cases"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts\/150","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=150"}],"version-history":[{"count":1,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts\/150\/revisions"}],"predecessor-version":[{"id":153,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=\/wp\/v2\/posts\/150\/revisions\/153"}],"wp:attachment":[{"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wudejiansteel.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}