API 2MT1 is an intermediate-strength structural steel plate used in the welded construction of offshore structures. API 2MT1 has a minimum yield strength of 50 ksi [345 MPa] and a minimum transverse Charpy V-notch impact toughness of 30 ft-lbf [41 J] at 0°F [-18°C]. SSAB is an API Licensee under the API Monogram Program.

API 2MT1 is intended primarily for use in offshore structures for Class "B" applications as defined in API RP 2A. API 2MT1 steel plates are suitable for use in select portions of offshore structures which must resist impact and plastic fatigue loading but are not subjected to substantial through-thickness (Z-direction) stresses.