... 4. Pipe mould: steel tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove pipe, tube frame, special-shaped mould ... materials, mouild steel Cr12mov material set high wear resistance, toughness, resistance to high pressure, high hardness, hard quenching.10. Maching ... than 0.05mm, square tube on the angle does not exceed ±0.05mm. High Hardness Welding Mould Roll ...