T/UNP 603-2025 General Technical Specifications for Forging Modules

Scope

Main technical content: This standard specifies the technical requirements, test methods, inspection rules, and packaging and storage for forging modules. Technical requirements include: chemical composition must comply with steel standards such as GB/T 11880, with deviations following GB/T 222; no defects such as cracks or folds on the surface; local concave depth ≤ 2mm and smooth polishing; clear dimensional tolerances for machining allowances (height + 5mm, length/width + 8 to + 12mm) and delivery dimensional tolerances (-1mm to +2mm); rough machining must show a metallic luster surface on all six sides and rounded corners (2mm to 3mm); internal quality requirements include no white spots or cracks; ultrasonic flaw detection according to GB/T 6402; post-forging annealing hardness of 197HB to 241HB; non-metallic inclusions rating ≤ 2.5 grade; forging ratio ≥ 8, with temperature controlled between 1,240°C and 800°C; mechanical properties according to work conditions for tensile, impact, and fatigue strength indicators. Test methods include spectral analysis, visual inspection, ultrasonic flaw detection, and hardness testing. Inspection includes factory inspection and type inspection, with batches divided by furnace number and size. Reinspection rules follow GB/T 17505. Packaging must be rust- and moisture-resistant, with transportation secured against collisions, and storage in a dry and ventilated area with raised and separated protection.

Development Information

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