33250 - Steel foundries (Miscellaneous)
33252 - Carbon steel castings, except investment
3325211 - - Cast carbon steel railroad car wheels & Railway specialties
3325212 - - Cast steel railroad car wheels
3325213 - - Carbon steel castings, Railway specialties
3325215 - - Carbon steel castings, Rolls for Rolling mills
3325219 - - Carbon steel castings (General)
3325299 - - Carbon steel castings, except investment (Miscellaneous)
33254 - High alloy steel castings, except investment
3325421 - - High manganese steel castings
3325431 - - High alloy steel castings (General)
3325499 - - High alloy steel castings, except investment (Miscellaneous)
33255 - Alloy steel castings, Others, except investments
3325551 - - Alloy steel castings, Railway specialties
3325555 - - Alloy steel castings, Rolls for Rolling mills
3325559 - - Alloy steel castings (General)
3325599 - - Alloy steel castings, except investments (Miscellaneous)
3325XX0 - - Steel foundries (Miscellaneous - Volume)
3325XX2 - - Steel foundries (Miscellaneous - Speciality)