国内阀门材料常用技术标准 碳素结构钢的牌号和化学成分
牌号 | 统一数字代号a | 等级 | 厚度(或直径)/mm | 脱氧方法 | 化学成分(质量分数)/%,不大于 | ||||
C | Si | Mn | P | S | |||||
Q195 | U11952 | ― | ― | F、Z | 0.12 | 0.30 | 0.50 | 0.035 | 0.040 |
Q215 | U12152 | A | ― | F、Z | 0.15 | 0.35 | 1.20 | 0.045 | 0.050 |
U12155 | B | 0.045 | |||||||
Q235 | U12352 | A |  ̄ | F、Z | 0.22 | 0.35 | 1.40 | 0.045 | 0.050 |
U12355 | B | 0.20b | 0.045 | ||||||
U12358 | C | Z | 0.17 | 0.040 | 0.040 | ||||
U12359 | D | TZ | 0.035 | 0.035 | |||||
Q275 | U12752 | A | ― | F、Z | 0.24 | 0.35 | 1.50 | 0.045 | 0.050 |
U12755 | B | ≤40 | Z | 0.21 | 0.045 | 0.045 | |||
>40 | 0.22 | ||||||||
U12758 | C | ― | Z | 0.20 | 0.040 | 0.040 | |||
U12759 | D | TZ | 0.035 | 0.035 | |||||
a 表中为镇静钢、特殊镇静钢牌号的统一数字,沸腾钢牌号的统一数字代号如下: Q195F——U11950; Q215AF——U12150,Q215BF——U12153; Q235AF——U12350,Q235BF——U12353; Q275AF——U12750。 b 经需方同意, Q235B 的碳含量可不大于0.22%。 |
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