Chemical composition of 10B21 cold heading steel rod，C (carbon) : 0.18 ~ 0.23; Si (Silicon) : ≤0.10; Mn (manganese) : 0.70 ~ 1.00; P (P) : ≤0.030; S (sulfur) : ≤0.035; B (boron) : ≥0.0005.Cold heading steel, good plasticity, strength is not too high, heat treatment effect is obvious. The performance is better than 20 steel, generally used for processing fasteners or other structural parts.SWRCH35K chemical composition C: 0.32~ 0.38Mn :0.60~ 0.90Si :≤ 0.35S :≤ 0.035P :≤0.030 .The use of metal plastic processing molding at room temperature, the internal organization of the material is tight, the mechanical properties of the product is good, the processing material loss is less, the production efficiency is high, the energy consumption is low,the product has high dimensional precision and good surface finish, and is widely used in the manufacture of bolts, nuts and screws, as well as in the manufacture of parts for bicycles, automobiles, mechanical equipment, electrical appliances, aviation equipment, cameras, construction and other industries.
Extended data:
Steel structure is a structure composed of steel materials and is one of the main building structure types. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates, and adopts silanization, pure manganese phosphating, washing and drying, galvanizing and other rust prevention processes. The components or components are usually connected by welds, bolts or rivets.
