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Cast ductile iron (80-60-03) vs cast 8620

Cast ductile iron (80-60-03) vs cast 8620

Cast ductile iron (80-60-03) vs cast 8620

(OP)
We make a fabrication of an auger that consists of welding a cast 8620 flight to a 8620 steel shaft. We are having a difficult time meeting our delivery requirements based on the lead times for the cast flights. A foundry we talked to suggested we use a 80-60-03 ductile cast iron as a replacement for the the cast 8620 flight. Does anyone see any obvious/major reasons not to consider this option if price and delivery can be improved over the cast steel?

RE: Cast ductile iron (80-60-03) vs cast 8620

Well...I thought 8620 is a designation for wrought carbon steel, not cast steel. What is the actual spec. that the cast parts will be produced to? Ductile iron is generally considered to be less weld-able than carbon steels, or are you integrally casting the shaft and flights together (would be my preference)? Finally, is the 3% ductility of the DI going to cause you trouble (what is the expected/desired ductility of the cast steel parts)?

RE: Cast ductile iron (80-60-03) vs cast 8620

If the 80-03 DI is a serious option for the auger flights (and it is not clear that it is, with the limited information you have supplied)it might make sense to just cast the whole thing.

RE: Cast ductile iron (80-60-03) vs cast 8620

Cast augers for pavers? The material best suited is NiHard, I have cast several of them for different machines. 8620 would last ,so long you have the weld layer,once this erodes,the soft belly gets exposed.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

RE: Cast ductile iron (80-60-03) vs cast 8620

Any resemblance between 80-60-03 and 8620 is purely coincidental, based on the numerical designation. One is weldable, one not. One has much higher fracture toughness than the other.

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