Faktori Pwovizyon pou Plak alyaj segondè pite
| Mak | C | Si | Mn | P | S | V | Nb | Al | Ti |
| Q345A | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.045 | ≤0.045 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | |
| Q345B | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.040 | ≤0.040 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | |
| Q345C | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.035 | ≤0.035 | 0.02-0.15 | 0.015-0.060 | ≥0.015 | 0.02-0.20 |
| Q345D | ≤0.18 | ≤0.55 | 1.00-1.60 | ≤0.030 | ≤0.030 | 0.02-0.15 | 0.015-0.060 | ≥0.015 | 0.02-0.20 |
| Mak | Pwopriyete mekanik | ||||
| 12Mn2A | Epesè ≤ 4mm plak asye | Epesè > 4mm plak asye | Brinell dite HBW Pa pi gran pase | ||
| Fòs rupture Rm N/m ㎡ | Elongasyon apre kraze A11.3% Pa mwens pase | Fòs rupture Rm N/m ㎡ | Elongasyon apre kraze A11.3% Pa mwens pase | ||
| 12Mn2A | 390-570 | 22 | 390-570 | 23 | ---- |
| 45Mn2A | 590-835 | 12 | 590-835 | 13 | -- |
| 20CrA | 390-590 | 18 | 390-590 | 20 | |
| 38CrA | 540-735 | 16 | 540-735 | 18 | ---- |
| 40CrA | 540-735 | 14 | 540-730 | 16 | -- |
| 20CrMnSiA | 490-685 | 18 | 490-685 | 21 | -- |
| 25CrMnSiA | 570-720 | 18 | 570-720 | 20 | 229 |
| 30CrMnSiA | 540-735 | 16 | 540-735 | 19 | 229 |
| 35CrMnSiA | 590-785 | 14 | 590-785 | 16 | - |
| 18CrMn2MoBA | 440-640 | 20 | 440-640 | 22 | 217 |
| 30CrSiMoVA | QQ709023242 | - | - | - | 217 |
Dapre itilizasyon pwofesyonèl la, gen plak pou tanbou lwil oliv, plak emaye, plak prèv bal, elatriye; Dapre kouch kouch sifas la, gen plak mens galvanised, plak mens fèblan, plak mens plon plak, plak asye plastik konpoze, elatriye.
1.Klasifikasyon pa epesè: (1) plak mens; (2) plak mwayen; (3) plak epè; (4) plak siplemantè epè.
2.Klasifikasyon pa metòd pwodiksyon: (1) fèy asye cho woule; (2) fèy asye woule frèt.
3.Klasifikasyon pa karakteristik sifas: (1) fèy galvanised (cho plonje fèy galvanised, elektwo galvanize fèy); (2) fèy fèblan; (3) fèy asye konpoze; (4) fèy asye koulè kouvwi.
4.Klasifikasyon pa aplikasyon: (1) plak asye pon; (2) Plak asye chodyè; (3) Plak asye konstriksyon bato; (4) Plak asye blende; (5) Plak asye otomobil; (6) Plak asye twati; (7) Plak asye estriktirèl; (8) Plak asye elektrik (fèy asye silikon); (9) Plak asye prentan; (10) Lòt klas Japonè komen nan plak asye pou estrikti jeneral ak mekanik.
