1, Carbon steel qauv: 10, 15, 20, 25, 30, 35, 40, 45, 50, ... 80
2, Cov cuab yeej carbon steel: T7, T8, T9, T10... T13, t7mn, t8mn... T13mn, t7mna...
Alloy steel qauv:
1. Manganese steel: 20Mn2, 30Mn2, 35Mn2, 40Mn2, 45Mn2, 50mn2
2. Manganese vanadium hlau: 20mnv, 42mnv
3. Manganese molybdenum tungsten steel: 30mn2mow
4. Chromium hlau: 15Cr, 20Cr, 30Cr, 40Cr, 45Cr, 50Cr
5. Chrome vanadium steel: 20crv, 40crv, 45crv
6. Chromium molybdenum hlau: 20CrMo, 30CrMo, 35CrMo, 42CrMo
7. Chromium molybdenum txhuas hlau: 38CrMoAl
8. Chromium nickel steel thiab chromium nickel molybdenum steel: 20crni, 40crni, 45CrNi, 12crni2, 12crni3, 37CrNi3, 20cr2ni4, 40CrNiMo, 18Cr2Ni4WA
9. Chromium manganese steel, chromium manganese titanium hlau, chromium manganese molybdenum steel:... 20CrMnTi
10. Chromium silicon steel, chromium manganese silicon steel:11 ~ x, dawb txiav hlau, tsis tshua muaj lub ntiaj teb hlau, boron steel, caij nplooj ntoos hlav steel, bearing steel
