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| Commodity | 2005 | 2006 | 2007 |
| Roller chain of iron/steel | $155 | $775 | $2,128 |
| Articulated link chain other than roller chain, of iron/steel | $10,065 | $1,614 | $5,848 |
| Parts of articulated link chain of iron/steel | $14,958 | $2,982 | $2,998 |
| Skid chain of iron/steel | $257,601 | $218,532 | $50,260 |
| Stud-link chain of iron/steel | | | $25,460 |
| Welded link chain of iron/steel | $39,794 | $69,445 | $133,798 |
| Chain, of iron/steel, n.e.s. in 73.15 | $17,937 | $9,591 | $27,791 |
| Parts of chains (excl. articulated link chain), of iron/steel | $8,507 | $81,273 | $25,723 |
| Total | $349,017 | $384,212 | $274,006 |
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