How to tie the cord of bag (external link) Q: Do you sell to minors? A: We do not sell martial arts swords to anyone under the age of 18, nor will we sell them to anyone purchasing on behalf of a person under the age of 18. Even if your underage son is an olympic Judo champion and has Menkyo-kaiden in every koryu, we’re still not selling to him. Keep in mind that regardless of your age if we feel you are going to use one of our swords irresponsibly, we will not sell to you. Our swords are martial arts training equipment, not weapons, hedge trimmers, or baseball bats. Please be responsible and seek proper training. Q: Do you have data on your steel grades? A: See chart below. Note: actual composition may vary significantly from data. Carbon equivalence for alloy steels may be approximated with the formula Carbon Equiv. = %C+(%Mn+%Si/6)+(%Cr+%Mo+%V/5)+(%Cu+%Ni/15). Grade %C %Mn %Cr %Si %Mo %V %Ni %Cu AISI 1050 0.48-0.55 0.60-0.90 – – – – – – AISI 1060 0.55-0.65 0.60-0.90 – – – – – – AISI