Carbon steel mold A3 A3 A3 mold steel plate processing large naked

Properties and Applications: There is a certain plasticity and toughness, high strength, good processability, using good mechanical properties obtained quenching. But the lower steel welding performance can still be welded, but before welding weldment should be preheated and should be annealed after welding to eliminate welding stress. Uses: For the manufacture of high-intensity exercise parts. Mold base plate with, machinery. A3 steel is a low carbon content of carbon steel, which a representative of the mechanical properties of steel, a3 is a standard grade of steel, which is the old standard GB / T700 statement . Has now made a change in the existing standard GB221-79 standard has no such comments. Which is corresponding to Q235 carbon steel grades, Q represents the material yield limit, digital refers to its yield value in 235MPa. This type of steel is the most widely used one, because of a moderate carbon content, with the strength, plasticity, and other aspects of the welding performance is better, from the overall performance is relatively good. Hong Kong and Germany a3 hardness of a steel, a3 steel hardness: HRC40-44. 2, after quenching hardness: low carbon steel [Q235 (new standard, quite original A3 steel), 15 #, 20 #]: Solid case hardening, carburizing depth is generally 0.8 ~ 1.2mm when (hammer thickness 2mm, is 0.3 ~ 0.5mm), the surface hardness is generally HRC56 ~ 62. 3, hardness units: Steel hardness (Hardness) codenamed H. Different hardness test methods, conventional expressed Brinell (HB), Rockwell (HRC), Vickers (HV), Richter (HL) hardness, which is more commonly used to HB and HRC. A3 at the plate, the most common material, is a general board series. One called for in the past: A3. - Hong Kong and Germany Standard: External standards: GB / T709-2006 "hot-rolled steel sheet and strip size, shape, weight and tolerance", the internal standards: GB / T3274-2007 "carbon steel and low alloy structural steel sheet and strip "category usually rolling from are: wire rod or bar, the steel, flat steel, angle steel, I-beam, channel, steel and other steel window frames, in the thick plate. Uses widely used in construction and engineering structures. Or the construction of factories for the production of steel frame house, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc., are also widely used as performance requirements are not too high mechanical parts. C, D grade steel can be made use of certain specialty steel.