Changes
/* groupe 1.72xx, Cr-Mo(-B) avec Mo < 0,35% */
[https://www.grantadesign.com/userarea/Mil/mil5_mainpdf2_3.htm infos MIL-HDBK-5-H (§2.3)], [http://everyspec.com/MIL-HDBK/MIL-HDBK-0001-0099/MIL_HDBK_5J_139/ download MIL-HDBK-5-J (complet, aller au §2.3)]
[http://www.lucefin.com/wp-content/files_mf/0542crmo4.pdf Lucefin]
trempe etc. cf. http://wenku.baidu.com/view/06fa9123bcd126fff7050b73.html page 27, lire la suite
| 10083 (aciers trempables),
