牌号 | 等级 | 化学成分 | 脱氧方法 | ||||
C | Mn | Si | S | P | |||
不大于 | |||||||
Q195 | — | 0.06~0.12 | 0.25~0.50 | 0.30 | 0.050 | 0.045 | F、b、Z |
Q215 | A | 0.09~0.15 | 0.25~0.55 | 0.30 | 0.050 | 0.045 | F、b、Z |
B | 0.045 | F、b、Z | |||||
Q235 | A | 0.14~0.22 | 0.30~0.65 | 0.30 | 0.050 | 0.045 | F、b、Z |
B | 0.12~0.20 | 0.30~0.70 | 0.045 | | |||
C | ≤0.18 | 0.35~0.18 | 0.040 | 0.040 | Z | ||
D | ≤0.17 | 0.035 | 0.035 | TZ | |||
Q255 | A | 0.18~0.28 | 0.40~0.70 | 0.30 | 0.050 | 0.045 | F、b、Z |
B | | 0.045 | |||||
Q275 | — | 0.28~0.38 | 0.50~0.80 | 0.35 | 0.050 | 0.045 | b、Z |