Scooper, those tables contain good data but they don't tell you what processing the tubes for an individual bike frame have been given. And they don't have 1:1 correspondence. That said, there's no doubt that properly handled 4130 will eclipse 1020 in tensile strength. My point is, your numbers are good examples, but are not necessarily indicative of actual bike frame tubing tensile strengths for 1020 and 4130.