5-1/2 Inch L80 Type 9 Cr Casing Coupled
Restricted alloy L80 Type 9 Cr (9% chromium) casing, but nonalloy base, 5-1/2 inch threaded. For sour service wells. 7306.29.10 if confirmed nonalloy.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If chromium exceeds nonalloy limits
High Cr content makes it alloy steel under Chapter 73 definitions.
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Import Tips & Compliance
• Chem analysis critical for Cr% to stay in nonalloy; exceed 1.65% total alloys → reclassify
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