Please … No.
I do not believe it is necessary to inject the mundanity of every detail of a hobby or profession into the crafting system. If I want to play ‘Cataclysm-DDA:The Dawn of Welding’ then I would support you wholeheartedly.[/quote]
Its not a mundane detail, each has its own strength, it could be a way to slow the damage of each part. 6010 & 6013 Could do -1 Dmg for each damage applied to the part, 7018 could do -2 Dmg for each damage applied to the part, and 8010 could do -3 Dmg for each damage applied to the part. The number at the beginning of each rod variant tells you how much psi they can take [Ex: 8### = 8000 Psi, 7### = 7000 Psi, 6### = 6000 Psi, etc.] so it is obvious that the stronger rods would hold up better against impacts.