A fork made from Hi Ten can be just as strong as a fork made from 4130 Cro Mo. But, if they are equally strong, the Hi Ten fork might weigh half a pound more. Recently, I have seen a few aluminum frame bikes that use Hi Ten forks. (These are bikes in the $200 to $400 price range). But, it has been several years since I have seen a Hi Ten frame in a bike shop. Aluminum frames have gotten too cheap for the factories to fool with Hi Ten.