arkie, if your spear is a C2-49 then;
All spears are made of silicon manganese spring steel. Each spear is roll forged, heat-treated, hardened and tempered with a nominal hardness of 45/49HRC. Each spear is straightened and strength tested.
http://www.metzproseries.com/C2-49-Bale-Spear-C2-49.htm