A fellow on a Jeeping forum contends that axle shafts used in Jeep CJ Dana 30 front axles are made of ductile iron. I say they are made of a forged carbon steel similar in composition to 1040 or 1050 which I understand is commonly used in OEM axle shafts. Is it possible for ductile iron to withstand the torsional stresses that axle shaft are subject to? Bear in mind that this is a front axle so that includes U joint yokes for steering. Thanks in advance for any responses.