When cutting and punching a part, the dimensional tolerance shall not be greater than 10% of the 12cr1mov equivalent asme thickness of the part. If burr occurs, the limit height shall not be greater than 0.3mm. If the part is drawn from steel sheet, some other changes may be made to ensure the basic size, but if the surface affects the assembly, it should be repaired flat. After the steel plate is installed, it should be cleaned. Before installing the steel bar, it should not pile up heavy objects on it.
The old Q370R grdae is 15MnNbR (GB6654), a low-alloy high-strength steel. Compared with the usual pressure vessel steel plate Q345R, 12cr1mov equivalent asme, Q370R steel plate has obvious advantages in terms of strength, impact toughness, cold and hot workability and welding performance, but Q370R steel has a certain tendency of welding cold cracking.
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If it is thin 12cr1mov equivalent asme parts, then local cooling can be carried out, or according to the length, width and thickness of the cutting parts, in the programming of pre-cooling shrinkage value compensation. The verticality error of the cutting mouth and the steel plate surface should be almost no, that is to say, the cutting mouth and the steel plate surface should be vertical, otherwise the cutting parts will appear size error.