Maraging steel, other than that specified in 1C116, ‘capable of’ an ultimate tensile strength of 1 950 MPa or more, at 293 K (20 °C). Note: 1C216 does not control forms in which all linear dimensions are 75 mm or less. Technical Note: The phrase maraging steel ‘capable of’ encompasses maraging steel before or after heat treatment.

Maraging steel, other than those specified by 1C116 or 1C216. Technical notes: 1. The phrase maraging steel ‘capable of’ encompasses maraging steel before or after heat treatment. 2. Maraging steels are iron alloys generally characterised by high nickel, very low carbon content and the use of substitutional elements or precipitates to produce strengthening and age-hardening of the alloy.

Steel alloys in sheet or plate form, having any of the following characteristics: (a) Steel alloys ‘capable of’ ultimate tensile strength of 1 200 MPa or more, at 293 K (20 °C); or (b) Nitrogen-stabilised duplex stainless steel. Note : the phrase alloys ‘capable of’ encompasses alloys before or after heat treatment. Technical note : ‘nitrogen-stabilised duplex stainless steel’ has a two-phase microstructure consisting of grains of ferritic and austenitic steel with the addition of nitrogen to stabilise the microstructure.

Grade 304, 316 and austenitic stainless steel plates, valves, piping, tanks and vessels (pipes and valves greater than 8-in diameter and rated for 500 psi and tanks greater than 500 l)

Maraging steel having both the following characteristics: i. ‘capable of’ an ultimate tensile strength of 1 500 MPa or more at 293 K (20 °C). ii. In bar or tube form, with an outer diameter of 75 mm or greater.

Maraging steels, other than those specified in 1C116 or 1C216, ‘capable of’ an ultimate tensile strength of 2 050 MPa or more, at 293 K (20 °C). Technical Note: The phrase ‘maraging steel capable of’ encompasses maraging steel before or after heat treatment.

Maraging steel capable of an ultimate tensile strength of 1 950 MPa or more at 293 K (20 °C) and in any of the following forms: (a) Sheet, plate or tubing with a wall or plate thickness equal to or less than 5,0 mm; (b) Tubular forms with a wall thickness of 50 mm or less and having an inner diameter of 270 mm or more

Steel alloys in sheet or plate form, having any of the following characteristics: (a) Steel alloys ‘capable of’ ultimate tensile strength of 1 200 MPa or more, at 293 K (20 °C); or (b) Nitrogen-stabilised duplex stainless steel. Note: The phrase alloys ‘capable of’ encompasses alloys before or after heat treatment Technical Note: ‘Nitrogen-stabilised duplex stainless steel’ has a two-phase microstructure consisting of grains of ferritic and austenitic steel with the addition of nitrogen to stabilise the microstructure.

Grade 304, 316 and austenitic stainless steel plates, valves, piping, tanks and vessels (pipes and valves greater than 8-in diameter and rated for 500 psi and tanks greater than 500 l)

Program information