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Hi, my name is Richard Oliver and welcome to this video about Dievar 25 Joules, our new material that is being released for the high-pressure die casting market. So, first of all, what does 25 Joules mean? Well, this refers to the toughness which is guaranteed on the material when it's delivered to you, the customer. So, previously Dievar was rated at 19 Joules minimum average. What that means is when we make the steel with a mill, we test the material for toughness, on what is called a Charpy V test, and we have 5 results which we take from the worst part of the block right in the center, and we take away the lowest and the highest, and you're left with 3 average results, so that's what the minimum average is. So, we have now increased Dievar by 30%, okay? From 19 Joules to 25 Joules minimum average for toughness. And this is important because we've been asked to make Dievar in now really big sizes of inserts and even, in some cases, whole dies. You'll see a picture on your screen in a second of the biggest Dievar we make, which is actually 18 tons in weight. This is a huge piece of Dievar, which we made for a customer about 3 years ago now. And this die, this block in particular, tested about 28 Joules, so with fantastic results for such a big block of steel. And the other thing we noticed was that because we did this special project, all the Dievar we were making went up in relative cents about 5-6 Joules in toughness, so it meant that we could offer this new improved toughness level to all our customers for Dievar. And this is really interesting because with this high level of toughness now it's been tailored to the structural part industry in high-pressure die casting, So that's why it was done in these big sizes. If you take a typical structural tool, it is very large, it can be extremely expensive and the worst thing you want is for that die to crack. But you also need good heat check resistance, which is what Dievar does really well. So, now if you've got this big expensive die, you now know you have a material on NADCA which is guaranteed to 25 Joules minimum average. It gives you that little bit of peace of mind that you have selected the best material for your application and you reduced the risk of cracking dramatically. Another thing that's important to remember is ductility is also important, and we also tested that recently with Dievar, and we got a figure back of over 400 Joules for ductility at 44-46 Rockwell. And again, ductility means it's resisting the crack from starting in the first place. So, if you think about a typical insert on a die, in the cycle it's expanding and contracting all the time, as you're die casting. So, the ductility is really important there, okay? And then once these little cracks start, then toughness comes into it. How long does it take for that crack to propagate? That's toughness, and that's where Dievar now works really, really well in these big sizes. It's been a pleasure to talk to you, thank you for listening to me.

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Duration: 3 minutes and 19 seconds
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Language: English
License: Dotsub - Standard License
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Posted by: gabriella61 on Mar 24, 2021

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