ASTM A106 giriş:
1. Amerikanyň standart materiallary üçin ASTM A106, A, B, C jemi üç synp
| Amerikan standarty | Şuňa meňzeş hytaýlylar | dartyş güýji |
| A | 20 # | 330MPa |
| B | S235 | 415MPa, |
| C | Q345 | 485MPa |
- Himiki derňew
| ≤C | Mn | ≤P | ≤S | Si | RKr | UCu | Mo | Ni | V | |
| A | 0.25 | 0.27-0.93 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
| B | 0.30 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
| C | 0.35 | 0.29-1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.4 | 0.15 | 0.4 | 0.08 |
Gradeokardaky synp C we Mn bilen tapawutlanýar, soň dürli dartyş güýji bilen gelýär.
 |  |
Iş wagty: Mart-12-2018