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China, Chinese Alloy Steel with 1.2379 SKD11 D2 JIS Cold Work Plate Pipe Tool Steel Sheet Flat Block Round Bar1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Steel ProductsSteel Round Baralloy steelcarbon steel
Ningbo Ningshing Precision Machinery Group Co., Ltd.
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Product Description Alloy Steel with 1.2379 SKD11 D2 JIS Cold Work Plate Pipe Tool Steel Sheet Flat Block Round Bar JIS SKD11 Cold Work Tool Steel is used for making different kinds of cold work molds with high accuracy and long service life, cutting tools and measuring instruments, such as complex-shaped piercing dies, threading screw plates, cold extrusion dies, cold cutting scissors, precision measuring tools etc.DimensionsRound: dia.10-700 mmFlat: 6-120 x 40-1000 mmBlock: 80-400 x 100-1000 mmDelivery ConditionEAF+(ESR) or EAF+LF+VD+(ESR), Hot rolled or Forged, Annealed, Black surface or Machined surface, UT SEP1921 Class3 D/dEquivalenceAISI / SAE DIN / W.Nr JIS GB D2 1.2379SKD11 Cr12MoV Chemical Composition(%)Steel Grade C Si Mn P S Cr Mo V SKD11 1.40-1.60 ≤ 0.40 ≤ 0.60 ≤ 0.030 ≤ 0.030 11.00-13.00 0.80-1.20 0.20-0.50 1.23791.45-1.60 0.10-0.60 0.20-0.60 ≤ 0.030 ≤ 0.030 11.00-13.00 0.70-1.00 0.70-1.00 D2 1.40-1.60 0.10-0.60 0.20-0.60 ≤ 0.030 ≤ 0.030 11.00-13.00 0.70-1.20 0.50-1.10 Charecteristics1. With good hardenability and wear resistance.2. With high oxidation resistance, good corrosion resistance after quenching and polishing, small deformation after heat treatment.Forging TechniqueHeat Temperature Start Forging Temperature Finish Forging Temperature Cooling Method 1120-1160 °C 1050-1090 °C ≥850 °C Thermal Annealing Heat TreatmentAnnealing800 to 850°CSlow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air.Hardness after annealing: max. 255 HB.Stress relieving650 to 700°CSlow cooling in furnace; intended to relieve stresses set up by extensive machining, or incomplex shapes. After through heating, hold in neutral atmosphere for 1 to 2 hours.Hardening1020 to 1040°CComplex shapes/air, simple shapes/air blast, oil, salt bath from (220 to 250°C or 500 to 550°C).Holding time after temperature equalization: 15 to 30 minutes.Obtainable hardness: 63 - 65 HRC.TemperingSlow heating to tempering temperature immediately after hardening/time in furnace 1hour for each 20 mm of work piece thickness, but at least 2 hours/cooling in air. For average hardness figures to be obtained, please refer to the tempering chart. For certain cases we recommend to reduce tempering temperature and increase holding time. For certain applications requiring improved retention of hardness, a nitriding treatmentis recommended. Q1: What is Ningbo Ningshing Precision Machinery Group Co., Ltd ?A1: Ningbo Ningshing Precision Machinery Group Co., Ltd., formerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., is the leading distributor of Special Steel, and also a professional mold base maker in China. Our business involves special steel trading, machining processing, mold base making, heat treatment, CNC machines manufacturing.Q2: Are you a manufacturer or a trader? A2: For Special Steel, we are the one of the leading distributors and service center in China. 9 warehouses with over 50,000 tons of regular stock. Our workshop has various kinds of equipments for sawing, milling, grinding, drilling etc.For mold base, we are a professional manufacturer, with 24 sets of CNC machines, 3 axis and 5 axis, CMM for inspection. We produce medium-large sized mold base for plastic injection mold and die casting die.Q3: How do you control the quality of steels?A3: Firstly, we have very close and deep relationship with Chinese Prime Mills, choose supplier carefully, and regard them as the long term business partner. Based on the long term cooperation, we concentrate on special steel business and expand the market step by step. Secondly, we have own technical center which is formed by the experienced engineers and technicians whom ever worked for prime mills. We control the quality in production process, in-out warehouse.Q4:: Which kind of processing can you do?A4: We do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. Meanwhile, we do vacuum heat treatment for die and mold.
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