1 范围
本标准规定了初轧板坯的尺寸、外形、重量及允许偏差、技术要求、检验与试验、标志和质量证明书等。
本标准适用于宝山钢铁股份有限公司生产的供再轧用的初轧板坯。压盖钢板坯不得再行切割、分块轧制。
2 规范性引用文件
下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准,然而,鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件,其最新版本适用于本标准。
GB/T 222 钢的化学分析用试样取样法及成品化学成份允许偏差
GB/T 223 钢铁及合金化学分析方法
3 尺寸、外形、重量及允许偏差
3.1 尺寸
3.1.1 板坯的公称厚度和公称宽度按表1的规定。
表1 mm
压 盖 钢 板 坯 |
公称厚度 |
公称宽度 |
镇 静 钢 板 坯 |
公称厚度 |
公称宽度 |
120 |
650~800 |
120 |
900~1150 |
150~200 |
900~1150 |
150~210 |
900~1150 |
240 |
1500~1600 |
220 |
1050,1100,1150 |
250 |
650 |
230 |
1350~1600 |
250 |
700~800 |
240 |
900~1100 |
250 |
900~1000 |
250 |
1350 |
250 |
1350~1450 |
|
|
注:经双方协议,可供应表1规定以外规格的板坯。 |
3.1.2 板坯厚度按5mm进级,宽度按50mm进级。
3.1.3 板坯宽度和厚度的允许偏差应符合表2的规定。
表2 mm
项目 |
尺寸 |
允许偏差 |
厚度 |
<150 |
±3 |
≥150 |
±5 |
宽度 |
650~1600 |
+15 -10 |
3.1.4 板坯的通常长度为4m~10m。定尺和倍尺长度应在通常长度范围内,其允许偏差为+80mm。
3.2 外形
3.2.1 板坯的每米弯曲度不得大于20mm,总弯曲不得大于总长度的2.0%。
3.2.2 板坯的镰刀弯每米不得大于10mm。
3.2.3 板坯的端部剪切斜度在厚度方向不得大于10mm,在宽度方向不得大于30mm。
3.2.4 板坯二侧面允许有不大于10mm的凹入或凸起,但在最大凹入或凸起处的板坯宽度不得超出允许偏差。
3.3 重量
板坯按实际重量交货。
4. 技术要求
4.1 牌号及化学成分
4.1.1 钢的牌号及化学成分(熔炼分析)应符合表3的规定。
4.1.2 板坯成品(镇静钢)化学成分允许偏差应符合GB/T 222的规定。
4.1.3 经供需双方协议,并在合同中注明,亦可供应其他牌号的板坯。
表3
用 途 |
牌号 |
脱氧 方式 |
适用的成品 板厚mm |
化学成分 % |
C |
Si |
Mn |
P |
S |
其他 |
一 般 结 构 钢 |
SS330 |
C |
≤6 |
0.07~0.16 |
≤0.05 |
0.15~0.55 |
≤0.035 |
≤0.035 |
- |
SS330 |
A |
≤6 |
0.06~0.15 |
≤0.05 |
0.25~0.65 |
≤0.035 |
≤0.035 |
Alt≥0.008 |
SS330 |
C |
>6~12.7 |
0.11~0.20 |
≤0.05 |
0.30~0.80 |
≤0.035 |
≤0.035 |
- |
SS330 |
A |
>6~12.7 |
0.06~0.15 |
≤0.05 |
0.45~0.95 |
≤0.035 |
≤0.035 |
Alt≥0.008 |
SS400 |
C |
≤6 |
0.16~0.25 |
≤0.05 |
0.30~0.80 |
≤0.035 |
≤0.035 |
- |
SS400 |
G |
≤6 |
0.12~0.21 |
0.04~0.30 |
0.20~0.70 |
≤0.035 |
≤0.035 |
- |
SS400 |
A |
≤6 |
0.12~0.21 |
≤0.05 |
0.40~0.90 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SS400 |
G |
>6~16 |
0.12~0.21 |
0.04~0.30 |
0.50~1.00 |
≤0.035 |
≤0.035 |
- |
SS400 |
A |
>6~16 |
0.08~0.17 |
≤0.06 |
0.70~1.30 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SS400 |
G |
>16~30 |
0.13~0.22 |
0.10~0.35 |
0.50~1.00 |
≤0.035 |
≤0.035 |
- |
SS400 |
G |
>30~50 |
0.15~0.24 |
0.10~0.35 |
0.70~1.20 |
≤0.035 |
≤0.035 |
- |
SS490 |
G |
≤6 |
0.13~0.22 |
≤0.25 |
0.50~1.00 |
≤0.035 |
≤0.035 |
- |
SS490 |
G |
>6~12.7 |
0.12~0.21 |
≤0.25 |
0.90~1.40 |
≤0.035 |
≤0.035 |
- |
SS540 |
G |
≤6 |
0.12~0.21 |
≤0.25 |
0.90~1.40 |
≤0.035 |
≤0.035 |
- |
St33 |
A |
≤13 |
0.03~0.12 |
≤0.08 |
0.15~0.65 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St37-2 |
A |
4~<7 |
0.04~0.13 |
≤0.08 |
0.35~0.85 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St37-2 |
A |
7~<13 |
0.04~0.13 |
≤0.12 |
0.55~1.05 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St37-2 |
A |
13~<18 |
0.08~0.17 |
≤0.12 |
0.55~1.05 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
一 般 结 构 钢 |
St37-2 |
A |
18~25.4 |
0.08~0.17 |
≤0.12 |
0.75~1.25 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St37-3 |
A |
<4 |
0.04~0.13 |
≤0.08 |
0.20~0.70 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
St37-3 |
A |
4~<7 |
0.04~0.13 |
≤0.08 |
0.40~0.90 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
St37-3 |
A |
7~<13 |
0.04~0.13 |
≤0.12 |
0.60~1.10 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
St37-3 |
A |
13~<18 |
0.08~0.17 |
≤0.12 |
0.60~1.10 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
St37-3 |
A |
18~25.4 |
0.08~0.17 |
≤0.12 |
0.80~1.30 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
St44-2 |
A |
<5 |
0.08~0.17 |
≤0.12 |
0.55~1.05 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St44-2 |
A |
5~<18 |
0.08~0.17 |
≤0.12 |
0.75~1.25 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St50-2 |
K |
<10 |
0.21~0.30 |
0.12~0.35 |
0.45~0.95 |
≤0.035 |
≤0.035 |
- |
St52-3 |
G |
<7 |
0.13~0.22 |
0.20~0.55 |
1.20~1.70 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
St52-3 |
G |
7~<18 |
0.13~0.22 |
0.20~0.55 |
1.10~1.60 |
≤0.035 |
≤0.035 |
Alt≥0.01 Nb≤0.04 |
St52-3 |
G |
18~25.4 |
0.13~0.22 |
0.20~0.55 |
1.10~1.60 |
≤0.030 |
≤0.030 |
Alt≥0.01 Nb≤0.04 |
表3(续)
用 途 |
牌号 |
脱氧方式 |
适用的成品 板厚mm |
化学成分 % |
C |
Si |
Mn |
P |
S |
其他 |
焊 接 结 构 钢 |
SM400A |
G |
≤6 |
0.05~0.14 |
0.10~0.35 |
0.50~1.00 |
≤0.035 |
≤0.035 |
- |
SM400A |
G |
>6~16 |
0.12~0.21 |
0.04~0.30 |
0.45~0.95 |
≤0.035 |
≤0.035 |
- |
SM400A |
A |
>6~12.7 |
0.10~0.19 |
≤0.06 |
0.60~1.10 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SM400B |
A |
>6~12 |
0.10~0.19 |
≤0.06 |
0.60~1.10 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SM400B |
G |
≤6 |
0.05~0.14 |
0.10~0.35 |
0.50~1.00 |
≤0.035 |
≤0.035 |
- |
SM400B |
G |
>6~12 |
0.12~0.21 |
0.04~0.30 |
0.45~0.95 |
≤0.035 |
≤0.035 |
- |
SM400C |
G |
≤6 |
0.12~0.21 |
0.04~0.30 |
0.25~0.75 |
≤0.035 |
≤0.035 |
- |
SM400C |
G |
>6~12 |
0.12~0.21 |
0.04~0.30 |
0.45~0.95 |
≤0.035 |
≤0.035 |
- |
SM490A |
G |
≤6 |
0.12~0.21 |
≤0.25 |
0.50~1.00 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM490A |
G |
>6~12.7 |
0.12~0.21 |
≤0.25 |
0.90~1.40 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM490A |
G |
15~20 |
0.12~0.21 |
0.20~0.60 |
1.10~1.60 |
≤0.035 |
≤0.035 |
- |
SM490A |
G |
>20~50 |
0.13~0.22 |
0.20~0.60 |
1.10~1.70 |
≤0.035 |
≤0.030 |
V≥0.03 |
SM490B |
G |
≤6 |
0.12~0.21 |
≤0.25 |
0.50~1.00 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM490B |
G |
>6~12 |
0.12~0.21 |
≤0.25 |
0.90~1.40 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM50B-1 |
G |
2.5~10 |
0.12~0.19 |
0.20~0.60 |
1.20~1.60 |
≤0.035 |
≤0.035 |
- |
SM490C |
G |
2~5 |
0.12~0.21 |
≤0.25 |
0.50~1.00 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM520B |
G |
1.4~9 |
0.12~0.21 |
≤0.25 |
0.90~1.40 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM520B |
G |
>9~12 |
0.06~0.15 |
0.20~0.60 |
1.10~1.60 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
SM520C |
G |
1.6~6 |
0.12~0.21 |
≤0.25 |
0.85~1.35 |
≤0.035 |
≤0.035 |
Nb≤0.04 |
热 轧 低 碳 板 用 钢 |
SPHCa) |
A |
1.2~12.7 |
≤0.13 |
≤0.05 |
0.15~0.50 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SPHDa) |
A |
1.2~12.7 |
≤0.10 |
≤0.05 |
0.15~0.50 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SPHE |
A |
1.2~6.0 |
≤0.08 |
≤0.05 |
0.15~0.50 |
≤0.030 |
≤0.030 |
Alt≥0.01 |
StW22a) |
A |
≤7 |
≤0.12 |
≤0.05 |
0.15~0.50 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
StW23 |
A |
≤7 |
≤0.10 |
≤0.07 |
0.10~0.45 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
StW24 |
A |
≤7 |
≤0.08 |
≤0.07 |
0.10~0.45 |
≤0.030 |
≤0.030 |
Alt≥0.02 |
焊管用钢 |
SPHT1a) |
A |
1.2~6 |
≤0.08 |
≤0.05 |
0.15~0.60 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SPHT2a) |
A |
1.2~6 |
≤0.13 |
≤0.05 |
0.20~0.65 |
≤0.035 |
≤0.035 |
Alt≥0.01 |
SPHT3b) |
G |
1.2~6 |
0.13~0.22 |
≤0.25 |
0.45~0.95 |
≤0.035 |
≤0.035 |
- |
机械结构钢 |
S20C |
G |
1.6~6 |
0.18~0.23 |
0.15~0.35 |
0.30~0.60 |
≤0.030 |
≤0.035 |
Cu≤0.30 Cr≤0.20 Ni+Cr≤0.35 |
S35C |
G |
1.6~6 |
0.32~0.38 |
0.15~0.35 |
0.60~0.90 |
≤0.030 |
≤0.035 |
|
C22 |
K |
<5 |
0.17~0.24 |
0.10~0.40 |
0.25~0.75 |
≤0.035 |
≤0.035 |
- |
C35 |
K |
<5 |
0.32~0.39 |
0.10~0.40 |
0.45~0.95 |
≤0.035 |
≤0.035 |
- |
表面硬化钢 |
C10 |
K |
<5 |
0.07~0.13 |
0.10~0.40 |
0.30~0.60 |
≤0.035 |
≤0.035 |
- |
C15 |
K |
<5 |
0.12~0.18 |
0.10~0.40 |
0.30~0.60 |
≤0.035 |
≤0.035 |
- |
S09CK |
G |
1.6~6 |
0.07~0.12 |
0.10~0.35 |
0.30~0.60 |
≤0.025 |
≤0.025 |
- |
S15CK |
G |
1.6~6 |
0.13~0.18 |
0.15~0.35 |
0.30~0.60 |
≤0.025 |
≤0.025 |
- |
锅 炉 及 压 力 容 器 用 钢 |
SB410 |
K |
6~15 |
0.10~0.19 |
0.10~0.35 |
0.40~0.90 |
≤0.035 |
≤0.030 |
- |
SB410 |
K |
>15~35 |
0.15~0.24 |
0.10~0.35 |
0.45~0.95 |
≤0.035 |
≤0.030 |
- |
SB410 |
K |
>35~50 |
0.16~0.25 |
0.10~0.35 |
0.50~1.00 |
≤0.030 |
≤0.030 |
- |
HⅡ |
A |
3~<5 |
0.10~0.19 |
≤0.12 |
0.50~1.00 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
HⅡ |
A |
5~<13 |
0.10~0.19 |
≤0.12 |
0.70~1.20 |
≤0.035 |
≤0.030 |
Alt≥0.01 |
19Mn6 |
G |
5~<7 |
0.13~0.22 |
0.25~0.60 |
1.10~1.60 |
≤0.035 |
≤0.030 |
- |
19Mn6 |
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