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Irani, M.; Karimi Taheri, A. (2008). "Effect of forging temperature on homogeneity of microstructure and hardness of precision forged steel spur gear" (PDF). Materials Chemistry and Physics. 112 (3): 1099–1105. doi:10.1016/j.matchemphys.2008.07.044. http://www.ewp.rpi.edu/hartford/~ernesto/F2010/EP1/Materials4Students/Quinn/Irani2008.pdf
The temperatures of alloys vary depending on the ration of metals mixture
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'Aluminum and Aluminum Alloys"
edited by Joseph R. Davis, p248
"Forging Iron: A Tutorial". 18 October 2018. https://arironllc.com/blog/forging-iron-a-tutorial