1C118 Category 1C

Titanium-stabilized duplex stainless steel (Ti-DSS), having all of the following characteristics (see List of Items Controlled).

Category 1: Special Materials and Related Equipment, Chemicals, “Microorganisms,” and “Toxins”

Reasons for control

Control	Column
AT applies to entire entry	AT 1
MT applies to entire entry	MT 1

Exception	As stated in the entry
GBS	N/A
LVS	N/A

Items: a. Having all of the following characteristics:
a.1. Containing 17.0-23.0% by weight of chromium and 4.5-7.0% by weight of nickel;
a.2. Having a titanium content of greater than 0.10% by weight; and
a.3. A ferritic-austenitic microstructure (also referred to as a two-phase microstructure) of which at least 10% by volume (according to ASTM E-1181-87 or national equivalents) is austenite; and
b. Having any of the following forms:
b.1. Ingots or bars having a size of 100 mm or more in each dimension;
b.2. Sheets having a width of 600 mm or more and a thickness of 3 mm or less; or
b.3. Tubes having an outer diameter of 600 mm or more and a wall thickness of 3 mm or less.

N/A

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.