S136H is pre hard, but the hardness is not very high, at around HRC30 degrees, do not require heat treatment, S136 steel is hardened material PM-35 sheet, very soft, you can use PM-35 material after the needs quenching, quenching After the hardness can reach HRC58 degrees. The former requirement ratio for small quantities of injection mold, which is used in large quantities. So usually happen in large quantities, can be ordered S136 steel, different on these two areas, there is a demand of the customer can be the difference between these two areas, which were combined amount of the purchase, both to save costs, but also conducive reasonable to buy more high-quality steel! Metal heat treatment requirements for material handling must also have a clear enough understanding. Know the composition of features, performance characteristics, scope critical point, the physical and chemical parameters or characteristics of the material of various materials (here including thermal properties, swelling properties and phase transition has occurred and other information). Domestic part have an influence in the local medium-sized steel mills have begun overhaul before and after National Day, which also makes the availability of resources in some areas to reduce the appearance of tight supply of steel products, while taking into account the ongoing maintenance of large-scale steel mills have not yet formed the size of the domestic steel supply and demand pattern overall temporarily unable to change, but in steel prices continued to fall and winter coming, the total domestic steel production is the line into a slow decline. Also, another concern news is that a substantial increase in China's steel exports this year, the domestic supply and demand pressures eased to some extent, but the Government has recently said that next year China's steel export tax rebate policy will be canceled when the steel export growth is expected to occur changes in steel prices will increase the uncertainty of the market outlook. Temper brittleness can be divided into first class and second class temper brittleness temper brittleness. The first category, also known as irreversible temper brittleness temper brittleness, mainly in the tempering temperature is 250 ~ 400 ℃, the brittleness disappears after reheating repeated in this interval temper brittleness no longer occur, the second tempering Brittle also known as reversible temper brittleness PM-35, the temperature occurring in the 400 ~ 650 ℃, when reheated brittleness disappears, should be quickly cooled, can not stay long or slow cooling in the range of 400 ~ 650 ℃, otherwise it will happen again catalyzed phenomenon. The occurrence of temper brittleness of steel alloying elements contained in the relevant, such as manganese, chromium PM-35 suppliers, silicon, nickel will have tendency to temper brittleness, and molybdenum, tungsten has diminished tendency to temper brittleness. Die steel, such as 3Cr2W8V, H13,5CrNiMo, 5CrMnMo etc., using higher than conventional heating quenching quenching temperature, can reduce the number of carbides in the steel to improve its morphology and distribution, so that the solid solution of carbon in austenite distribution technology, after quenching can get more lath martensite in the steel to improve its fracture toughness and thermal fatigue resistance, thus prolonging the life of mold. For example, one hot 3Cr2W8V steel extrusion dies, conventional quenching temperature is 1080 ~ 1120 ℃, tempering temperature is 560 ~ 580 ℃. As we all know, this year the real estate market is very weak, the price of a continuous downward, closing the sluggish performance of the economy as a whole form a larger pressure, to a certain extent, restrict the continued development of the economy. Then, after the country have relaxed the restriction, the central bank introduced the New Deal in the end of September: the lower the lending rate is 0.7 times the benchmark lending rate, to have two sets and more housing and home loans have been settled respective families, and apply for loans to buy housing banking financial institutions should carefully grasp according to the borrower solvency, credit conditions and other factors and to specify the down payment ratio and lending rates PM-35 material jiulongpo PM-35_ _ AsiaVest steel mold (view) from Dongguan mayor Ernst & Young Granville mold steel shop offers. "Die steel, DC53, SKD11.SUS440C, SUS420" preferred Dongguan City An Yongwei steel mold shop (2), the company is located at: 3 A, Dongguan City Changan Ha Kong, the first industrial zone, over the years, Yong Wei mold steel stick providing customers with the best quality service, contact: Simon / R. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Yong Wei mold steel expect to be your long term partner!