... Pipe mould: steel tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove pipe, tube frame, special-shaped ... quality tool steel Cr12mov as raw materials, mouild steel Cr12mov material set high wear resistance, toughness, resistance to high pressure, high ... tolerance of roundness in les than 0.05mm, square tube on the angle does not exceed ±0.05mm. High Hardness ...