Here's a rough guide to tensile strengths. Only an approximate guide, but gives an idea of the relative strength differences for tubing. Of course, the extra strength is generally used to allow a reduction in the wall thickness, and frame mass so the better quality tubes need to be a larger diameter with thinner walls to regain the stiffness, which makes them more prone to denting. No such thing as a free lunch with metals 
UTS(N/mm2)/ Alloy family/ tube sets:
All the best,
UTS(N/mm2)/ Alloy family/ tube sets:
- 1750-2050/Cro-Ni-Ti-Mg/Reynolds 953
1484/Cr-mo heat treated/True Temper OX
1250-1400/Mg-Cr-Mo/Reynolds 931
1225-1400/Mg-Cr-Mo/Reynolds 853
1315/Mn-Mo Heat treated/Reynolds 753
1280/Ni-Va-Cr/Columbus Nivacrom Max-EL-Genius-Cyber-Foco etc
1235/Cr-Mo/Tange Prestige-Logic
1030/Cr-Mo/Columbus Cyclex SL-SLX
925/Cr-Mo/Reynolds 708-653
800-900/Cr-Mo/Reynolds 631
894/Cr-Mo/Tange Infinity-MTB
870/Cro-Mo/Columbus Cromor-Thron
880/Cr-Mo/4130 Aircraft
802/Mn-Mo/Reynolds 531
802/Cro-Mo/Reynolds 525-501
720/Cr-Mo/Columbus Aelle-Gara
440/Cr-C/Mild Steel
All the best,
