Personally I could go with steel, I prefer the Aluminum for weight as long as it matches the strength per design requirements.... BUT Cast iron? No way in hell. Cast Iron is very appropriate for some applications, But in this application, no way. All you have to do is come down hard on a rock and you could split the thing wide open. Cast Iron does not show signs of failure... It just fails period. It is also a problem for welding... Steel would be far superior.
Good pints but I still would not trust it in this situation. You are right much higher yield but no give what so ever.
I agree with you. I wouldn’t want a cast part in high stress areas. ESPECIALLY when the loading levels are so difficult to predict. Just saying when precise loads are known casting is a very good solution.
high stress area with likely poor knowledge of loading conditions. Bad combination for casting. But there are good combinations. I am going to start a friendsOfCasting coffee club.I've seen a few of these in my days on this earth.
Again... THAT is a problem I am worried about. BUT because that has only happened on recently manufactured portals which have had very little use time (the way I understand it - I could be wrong) and NONE of the early models have ever reported a problem remotely like this (the way I understand it - I could be wrong), suggests to me there has been a change in the material. I do not know why there would have been a change but the material seems to be failing since the same design with earlier materials seems to be holding up just fine... Just an observation based on very limited information.I've seen a few of these in my days on this earth.
Totally agree, I think people often confuse cast iron and cast steel. Both have their place but cast steel is vastly superior for something like this. But still not my ideal choice.
I will agree that casting is the better solution in some circumstances... Like brake calipers.... although you have weight issues you should be able to predict force requirements.I agree with you. I wouldn’t want a cast part in high stress areas. ESPECIALLY when the loading levels are so difficult to predict. Just saying when precise loads are known casting is a very good solution.
I may change my username to “friendOfCasting”
New internet acronym dropping:
Another observation.... IF that material were meeting the 7075 strength that is reported by Alcoa, I would have expected the tensile in that material to have caused some deformation, some bending, something.... That broke off like it was really brittle... Not what I would expect from a 7075. That is what a cast product looks like when it fails....
I thought it looked like cast aluminum.
I can gracefully exit the thread now and immediately cease my campaign of disinformation.
exactly.Has me wondering if there were any batches between the bracket failure and now the structural failures.
Meanwhile first batch guys be like
Little baling wire and that cast iron portal could be a Dutch Oven. At this point portals make me think of survival situations.
