ASTM A106 kirish:
1. ASTM A106 Amerika standartidagi materiallar uchun, jumladan, A, B, C jami uchta sinf
| Amerika standarti | Shunga o'xshash xitoycha | mustahkamlik chegarasi |
| A | 20# | 330MPa |
| B | Q235 | 415MPa, |
| C | Q345 | 485MPa |
- Kimyoviy tahlil
| ≤C | Mn | ≤P | ≤S | Si | ≤Cr | ≤Cu | 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 |
Yuqoridagi daraja C va Mn bilan ajralib turadi, keyin u turli xil kuchlanish kuchiga ega.
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Nashr vaqti: 2018-yil 12-mart