Material Name: High quality carbon structural steel Grade: 15Mn Standard: GB / T 699-199915Mn penetration is high carbon manganese steel, performance similar to 1020 and the 15th of steel chemical composition, good weldability, but hardenability, strength and ductility are 15 are higher than those of steel, 15Mn carbon structural steel for high mechanical performance requirements of the central portion and the need to manufacture carburizing parts. 15Mn compared with 30 steel has a higher strength and hardenability, good cold deformation plasticity, weldability, moderate, good machinability. There is a tendency to temper brittleness and heat sensitivity during the heat treatment. Suitable bolts nuts screws rod small shaft gear brakes. Chemical composition: Carbon C: 0.12 ~ 0.18 Si Si: 0.17 ~ 0.37 Manganese Mn: 0.70 ~ 1.00 Sulfur S: ≤0.035 phosphorus P: ≤0.035 chromium Cr: ≤0.25 Ni-Ni: ≤0.30 copper Cu: ≤0.25 30 号 Chinese name Title 30 steel standard unified digital code U20302 GB / T 699-1999 constituencies quality carbon structural steel, 30 steel used for forging and hot stamping mechanical parts, cold drawn, heavy and general machinery shaft, rod, cover ring, as well as on the use of machinery castings, such as cylinder, turbine frame, rolling machine frame and parts, machine frame and flywheel. Welding performance: 30 steel and 45 steel their only engagement is better among the hardness of steel electrodes 1020 Which spot, suitable for air-cooled steel, cast: as ICD5,7CrSiMnMoV ... and so on. Drawing automobile sheet metal cover mold and large metal sheet metal stamping molds, stretch parts repair can also be used to make stiff dough. Also in use is also something that needs to be noted: 1 in 1020 before prices damp construction sites, the first dry electrode to 150-200 ° C 30-50 minutes. 2. normally subjected to above 200 ° C preheating, air-cooled after welding 1020, if possible, the best implementation of stress relief. 3. Multi-layer surfacing Department to CMC-E30N base, can get better welding results. Hardness HRC 48-52 main ingredient Cr Si Mn C For current range: diameter and length m / m 3.2 * 350mm 4.0 * 350mm current range (Amp) 70-100 130-150 1020,1020 mechanical properties, Suzhou, with (certified merchants ) provided by the Suzhou, Metal Materials Co., Ltd. with. Suzhou, with Metal Materials Co. (www.szrtjs.com) located in Wuzhong District, Suzhou City Pu Town and Xi Road No. 1238 (Puyang intersection). Scraps and development in the wave of market economy, the current Suzhou, with has a high profile in the metal building, and enjoys a good reputation. Suzhou, get the whole network business alliance with certification, marking our service and management level has reached a new height. Suzhou, with the staff willing to work with all people of insight and common development, for a better future.