1). Size: 510mmX510mmX2550 Grade: 4140/42CrMo4/1.7225 2). Weight 5326 3). Melting Process: EAF+LF+VD 4). Heat treatment: Annealing / Normalizing / Soft Cooling/ Quenched& Tempered 5). Finish and Appearance: Rough Turning / Grinding / Black Condition 6). US inspection: To SEP1921/84, C/c 7). ASTM Grain Size: To EN ISO 643 or ASTM E 112: 5 or finer. 8). Reduction Ratio: Minimum 3 9). Non-metal inclusion: To ASTM E 45 method A. Thick: A≤ 2.0; B≤ 1.0; C≤ 0.5; D≤ 1.0 Thin: A≤ 2.5; B≤ 2.5; C≤ 0.5; D≤ 1.5 10). The content of H2: 2.0ppm 11). Straightness: Maxi 3 mm per meter. 12). Diameter Tolerance: -0/+3mm (rough turned) -0/+5mm (black condition)
