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Chinese Professional Joist And Girder - Low Temperature Pipe (A333 A334 Gr.6 Gr.3) – Sinoworld

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Our company since its inception, always regards product quality as enterprise life, continuously improve production technology, improve product quality and continuously strengthen enterprise total quality management, in strict accordance with the national standard ISO 9001:2000 for Galvanized Steel Pipe Flange, Stainless Spiral Duct, Square Ss Pipe, We look forward to receiving your enquires soon and hope to have the chance to work together with you inside the future. Welcome to take a look at our organization.
Chinese Professional Joist And Girder - Low Temperature Pipe (A333 A334 Gr.6 Gr.3) – Sinoworld Detail:

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Grade 1, Grade 3, Grade 4, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11;
Low temperature carbon steel pipe quenching temperature in A3 + (30 ~ 50) ℃, in practice, is usually set to the upper limit. High quenching temperature heat pipe can make low speed, surface oxidation reduction, and can improve work efficiency. The workpiece is uniform austenite, will require sufficient holding time. If the actual installed furnace capacity, would need to be appropriate to extend the holding time. Otherwise, there may be insufficient hardness due to uneven heating caused by the phenomenon. However, the holding time is too long, will also appear coarse grains, oxidation and decarbonization serious ills affecting quenching quality. We believe that if installed furnace is greater than the process documents, heating holding time to be extended 1/5.

Low temperature carbon steel pipe because of low hardenability, it should adopt a large cooling rate of 10% salt solution. Workpiece into the water, should hardenability, but not chilled, if 45 # precision steel chilled in brine, it is possible cracking of the workpiece, this is because when the workpiece is cooled to about 180 ℃, the austenite rapidly converted to horse s body tissue caused by excessive stress due. Therefore, when the quenching and tempering steel quickly cooled to this temperature range, the approach should be taken to slow cooling.

As the water temperature is difficult to grasp, accountable experience in operation, when the water stops dithering artifacts, you can water cooled (eg oil cooler can be better). In addition, the workpiece into the water, appropriate action should still be in accordance with the geometry of the workpiece, as regular exercise. Stationary cooling medium plus stationary workpiece, resulting in uneven hardness, stress uneven leaving large deformation of the workpiece, and even cracking.


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We insist on offering premium quality manufacturing with superior business concept, honest product sales as well as finest and fast assistance. it will bring you not only the good quality product or service and huge profit, but the most significant is to occupy the endless market for Chinese Professional Joist And Girder - Low Temperature Pipe (A333 A334 Gr.6 Gr.3) – Sinoworld , The product will supply to all over the world, such as: Sheffield, Munich, Estonia, To make every client satisfied with us and achieve win-win success, we will continue to try our best to serve and satisfy you! Sincerely looking forward to cooperating with more overseas customers based on mutual benefits and great future business. Thank you.
  • A nice supplier in this industry, after a detail and careful discussion, we reached a consensus agreement. Hope that we cooperate smoothly.
    5 Stars By Juliet from Burundi - 2017.12.09 14:01
    The company leader recept us warmly, through a meticulous and thorough discussion, we signed a purchase order. Hope to cooperate smoothly
    5 Stars By Cheryl from Germany - 2018.06.05 13:10
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