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.

1C116

II.A1.016

ANNEX III - CATEGORY 1 — SPECIAL MATERIALS AND RELATED EQUIPMENT

1C - Materials

EU Regulation No 267/2012

Maraging steels, usable in the systems specified in 1.A. or 19.A.1., having all of the following: a. Having an ultimate tensile strength, measured at 20 °C, equal to or greater than: 1. 0,9 GPa in the solution annealed stage; or 2. 1,5 GPa in the precipitation hardened stage; and b. Any of the following forms: 1. Sheet, plate or tubing with a wall or plate thickness equal to or less than 5,0 mm; or 2. Tubular forms with a wall thickness equal to or less than 50 mm and having an inner diameter equal to or greater than 270 mm. Technical Note: Maraging steels are iron alloys: a. Generally characterised by high nickel, very low carbon content and use substitutional elements or precipitates to produce strengthening and agehardening of the alloy; and b. Subjected to heat treatment cycles to facilitate the martensitic transformation process (solution annealed stage) and subsequently age hardened (precipitation hardened stage).