tubing size for a-arms?

[Kendall Burleson]

Hey guy
You don't want to use 4130 on the street thin wall or heavy wall .4130 will not last very long on the street because memory compare to mild steel .take a one foot peice and bent it and will not bend back to a netural state many time before failure. compared to mile steel DOM have a good memory that is why NASCAR used it in all their rollcage. because went one those 3800lb car flip over and over the cage is still in one piece bend but not broken (DOM mild steel).A NHRA top fuel car crash the chassis will some time break in half because it weight 1900lb (4130 chromemoly) they are looking for lite-weight.you take 11/2x.085x12 long(4130)has more strengh that 11/2x.125x12 long but the 4130 is lighter but it will work harded and break.Indy car will only use 4130 on chassis parts only and small prop air planes. you also have to TIG weld 4130 I hope this help you

kendall