表1
| 类别 |
牌号 |
化学成分/% |
| Mn |
C |
Si |
P |
S |
| Ⅰ |
Ⅱ |
Ⅰ |
Ⅱ |
| ≤ |
| 低碳锰铁 |
FeMn88C0.2 |
85.0-92.0 |
0.2 |
1.0 |
2.0 |
0.10 |
0.30 |
0.02 |
| FeMn84C0.4 |
80.0-87.0 |
0.4 |
1.0 |
2.0 |
0.15 |
0.30 |
0.02 |
| FeMn84C0.7 |
80.0-87.0 |
0.7 |
1.0 |
2.0 |
0.20 |
0.30 |
0.02 |
| 中碳锰铁 |
FeMn82C1.0 |
78.0-85.0 |
1.0 |
1.5 |
2.5 |
0.20 |
0.35 |
0.03 |
| FeMn82C1.5 |
78.0-85.0 |
1.5 |
1.5 |
2.5 |
0.20 |
0.35 |
0.03 |
| FeMn78C2.0 |
75.0-82.0 |
2.0 |
1.5 |
2.5 |
0.20 |
0.40 |
0.03 |
| 高碳锰铁 |
FeMn78C8.0 |
70.0-82.0 |
8.0 |
1.5 |
2.5 |
0.20 |
0.33 |
0.03 |
| FeMn74C7.5 |
70.0-77.0 |
7.5 |
2.0 |
3.0 |
0.25 |
0.38 |
0.03 |
| FeMn68C7.0 |
65.0-72.0 |
7.0 |
2.5 |
4.5 |
0.25 |
0.40 |
0.03 |
4.1.2 高炉锰铁按锰及杂质含量的不同，分为五个牌号，其化学成分应符合表2规定。
表2 高炉锰铁牌号及化学成分
| 类别 |
牌号 |
化学成分/% |
| Mn |
C |
Si |
P |
S |
| Ⅰ |
Ⅱ |
Ⅰ |
Ⅱ |
| ≤ |
| 高碳锰铁 |
FeMn78 |
75.0-82.0 |
7.5 |
1.0 |
2.0 |
0.30 |
0.50 |
0.03 |
| FeMn74 |
70.0-77.0 |
7.5 |
1.0 |
2.0 |
0.40 |
0.50 |
0.03 |
| FeMn68 |
65.0-72.0 |
7.0 |
1.0 |
2.5 |
0.40 |
0.60 |
0.03 |
| FeMn64 |
60.0-67.0 |
7.0 |
1.0 |
2.5 |
0.50 |
0.60 |
0.03 |
| FeMn58 |
55.0-62.0 |
7.0 |
1.0 |
2.5 |
0.50 |
0.60 |
0.03 |
