from wikipedia...
* 453 - Manganese/Titanium alloy. Reynolds produced only the 3 main tubes in this alloy and they were single butted.
* 501 - Reynolds 501 was a chromium-molybdenum (CrMo) steel, seamed, butted tubeset that made its debut about 1983 and was available in two different thicknesses.
* 525 - Cold worked Chromoly. UTS: 700-900 MPa, density 7.78 g/cm3
* 531 - Manganese/Molybdenum. UTS: 700-900 MPa (48-58 Tsi, 100-130 ksi)
o 531SC - Limited edition tubeset used by Trek Bicycle Corporation in 1984
o 531C - Competition Racing tubeset
o 531SL - Special Lightweight tubeset - 531SL was a tube set sold in the 70s which has 531 main triangle drawn lighter than standard and 753 rear stays. This was replaced in 1981 within the Reynolds range by 653[4]
o 531ST - Special Touring tubeset[5]
o 531OS - Oversize tubeset
* 631 - Seamless air-hardened heat-treated. UTS: 800-900 MPa, density 7.78 g/cm3
o 631OS - Oversize tubeset
* 653 - Was a mixed tubeset which combined tubings of different steels; 753 stays with 653 main tubes and 531 forks [6].
o 653 Record - Needs information
* 708 Classic - 708 was a tube set in Reynolds' range in the 80's, supposedly designed for track frames[citation needed]. It has 531 main tubes. These were not butted, but had 8 flats running along the length of the tube. The rear stays would be 753.
* 725 - Heat-Treated Chromoly. UTS: 1080-1280 MPa, density 7.78 g/cm3
o 725OS - Oversize tubeset
* 731 - Needs information
o 731OS - Oversize tubeset
* 753 - Heat-Treated Manganese/Molybdenum. Essentially 531 made with reduced wall thickness and heat treated to increase tensile strength. UTS: 1080-1280 MPa (70-83 Tsi, 157-186 ksi)
o 753OS - Oversize tubeset
* 853 - Seamless air-hardening heat-treated. UTS: 1250-1400 MPa, density 7.78 g/cm3
o 853OS - Oversize tubeset
* 953 - Maraging stainless steel. UTS: 1750-2050 MPa, density 7.8 g/cm3
Notes:
1. 531, 653 and 753 series no longer produced by Reynolds, due to their inability to be TIG welded.
[edit] Aluminium
* 7005 - Al-Zn alloy. UTS: 400 MPa, density 2.78 g/cm3
* 6061 - Al-Si-Mg alloy. UTS: 325 MPa , density 2.70 g/cm3
* X-100 - Al-Li Alloy. UTS: 550-600 MPa, density 2.65 g/cm3
[edit] Titanium
* 6Al-4V - Seamless ELI Grade. UTS: 900-1150 MPa, density 4.42 g/cm3
* 3Al-2.5V - Seamless. UTS: 810-960 MPa, density 4.48 g/cm3
[edit] Magnesium
* MZM Electron - Magnesium Alloy. UTS: ~300 MPa, density ~1.80 g/cm3