US Customs and Border Protection (CBP) has issued guidance on adding additional steel derivative products to Annex I of the Harmonized Tariff Schedule of the United States (HTSUS) under Proclamation 10896 and adding additional aluminum derivative products to Annex I of the HTSUS under Proclamation 10895.
Steel:
https://content.govdelivery.com/accounts/USDHSCBP/bulletins/3ee1cba
Aluminum:
https://content.govdelivery.com/bulletins/gd/USDHSCBP-3ee1ce7?wgt_ref=USDHSCBP_WIDGET_2