| Element |
Composition ,max,percent |
| Type Ⅰ |
Type Ⅱ |
Type Ⅲ |
| Carbon |
0.008B |
0.05 |
0.02 |
| Manganese |
0.40 |
0.50 |
0.35 |
| Phosphorus |
0.020 |
0.020 |
0.020 |
| Sulfur |
0.030 |
0.030 |
0.030 |
| Other |
|
C |
D |
| A Where aluminum is used as the deoxidizing agent,the aluminum content total by product analysis is usually in excess of 0.010%. |
| B Heat analysis of carbon is not appropriate for TypeⅠSheet product analysis is appropriate for checking croper type of material. |
| C Microalloy additions are permitted to meet special customer requirements. |
| D Columbium or titanium additions,or both,are made to combine with carbon and nitrogen to produce an interstitial-free steel. |
