30MnSi wire industry Wire

30MnSi prestressed steel bars pile skeleton as a material to withstand tensile, compressive and bending stresses in the pipe also subjected to centrifugation process, steam curing processes, the strength of steel bar caused some damage. Piles conditions of use, the manufacturing process determine 30MnSi wire prestressed concrete steel bar known. Its chemical composition: C 0.28 ~ 0.33 Si 0.70 ~ 0.90 Mn 0.90 ~ 1.30 P≤0.025 S≤0.025 Cu≤0.20 Cr≤0.20 Ni≤0.02 As≤0.15 its main purpose is to make building steel skeleton Zhuang require cold Heading not exist cracking, pay attention to their aging avoid aging fracture. Bars must have high strength, low relaxation should also have good plasticity and toughness, which requires 30MnSi from the smelting of steel heat treatment of steel bars to all sectors should have a reasonable process. 1. Effect of alloying elements on the mechanical properties of PC steel bars pile 30MnSi chemical composition of steel as shown in Table 1. Increased C, Si, Mn three elements in the austenite stability can be improved to reduce the critical cooling rate, improve 30MnSi hardenability. Which will increase the C content in improving hardenability while also improving hardenability of steel to reduce steel plasticity, the effect of different C content on the mechanical properties of steel bars as shown in Table 2; and Si, Mn basic and hardenability regardless of the content of both can increase after quenching and tempering process 30MnSi organization Decomposed slowed, increasing tempering resistance, improve the tempering stability of the organization. The company Jiujiang wire stock 30,000 tons per month, complete specifications -6.5-8-10-10-14-16 materials are -Q195-Q235HPB300-SAE1006-SAE1008-30MnSi and other materials for use in a variety of processing. Quality, price concessions.