Ferrous Charge? T


What’s in Your Eugene Muratore, Rio Tinto Iron and Titanium America, Chicago, Illinois Inside This Story


• Learn the different residual levels you can expect in your charge materials.


• Control your residual levels by working with your supplier and properly diluting your charges.


• Understand the market for steel scrap and how it will affect your operations.


he resources metalcasters can use as charge materials for ferrous melting are stable and limited. The worldwide demand for iron units does


not appear to be decreasing, with the greatest demand coming from devel- oping nations such as China, Brazil, Russia, Turkey and India. The entire steel scrap market is


complex and not easily predicted, but prices are most likely to remain firm for all iron units, and residual levels in steel scrap will not be reduced (see sidebar “Examining the Steel Scrap Market” for more information). It is


more likely that with increased demand for higher strength levels and higher strength to weight ratios, residual levels will increase. To combat this increase, it is im-


portant that metalcasters have a full working knowledge of what is in their charge materials.


Charge Options When selecting charge materials for


iron and steel castings, it is imperative that revert (home scrap or returns) be utilized in the charge makeup. These returns are of a known makeup, hav- ing been analyzed during production.


36 MODERN CASTING / February 2011


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76