Химический состав (масс.%)
| Стандарты |
Марка |
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
CEV |
| GB/T8163 |
10 |
0.07~0.13 |
0.17~0.37 |
0.35~0.65 |
≤0.025 |
≤0.020 |
≤0.15 |
≤0.30 |
≤0.25 |
-- |
| 20 |
0.17~0.23 |
0.17~0.37 |
0.35~0.65 |
≤0.025 |
≤0.020 |
≤0.25 |
≤0.30 |
≤0.25 |
-- |
| Q345 |
≤0.20 |
≤0.50 |
≤1.70 |
≤0.025 |
≤0.020 |
≤0.30 |
≤0.50 |
≤0.30 |
≤0.45 |
| Q390 |
≤0.20 |
≤0.50 |
≤1.70 |
≤0.025 |
≤0.020 |
≤0.30 |
≤0.50 |
≤0.30 |
≤0.46 |
| Q420 |
≤0.20 |
≤0.50 |
≤1.70 |
≤0.025 |
≤0.020 |
≤0.30 |
≤0.80 |
≤0.30 |
≤0.48 |
| Q460 |
≤0.20 |
≤0.60 |
≤1.80 |
≤0.025 |
≤0.020 |
≤0.30 |
≤0.80 |
≤0.55 |
≤0.53 |
| ASTM A53 |
A |
≤0.25 |
- |
≤0.95 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.40 |
≤0.40 |
-- |
| B |
≤0.30 |
- |
≤1.20 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.40 |
≤0.40 |
-- |
| ASTM A106 |
A |
≤0.25 |
≥0.10 |
0.27~0.93 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.40 |
≤0.40 |
-- |
| B |
≤0.30 |
≥0.10 |
0.29~1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.40 |
≤0.40 |
-- |
|
Примечание: 1. Для марок Q345D, Q345E содержание C≤0,18%, Nb≤0,07%, V≤0,15%, Ti≤0,20%; 2. Для классов D, E содержание Als≥0,015%.
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