Vacuum-degassed special cube forgings

Forged blocks are of higher quality than plate due to the block having forging reduction on all four to six sides if required by the application. This will produce a refined grain structure which will assure the absence of defects and material soundness. Maximum forged block dimensions depend on material grade.     Product Description Special cube forgings are three-dimensionally upset forged blocks with equal or near-equal edge lengths, delivered in sizes from 80 mm to 1 500 mm and weights up to 25 t. Starting billets are vacuum-degassed low-alloy or stainless steels (20MnMoNi55, 18CrNiMo7-6, 4130, 17-4 PH) melted by EAF+LF+VD/ESR to keep hydrogen ≤ 2 ppm. Multi-directional forging on a 40 MN press breaks cast structure and produces a uniform, fine-grained micro-structure in all three axes.   Performance Normalise or quench-temper achieves 450–750 MPa yield, 650–950 MPa tensile, ≥ 50 J at –40 °C Charpy; through-thickness properties vary < 5 %. 100 % UT to EN 10228-3 Class 3 and…