12/24/2022 0 Comments Welding 4130 standard notes![]() JIS G4051 : S××C, JIS G4053 : SCr, SMn, SMnC, SCM, SNC, SNCM, Supplemented with ASTM/AISI/SAE 1st class. Table 1 Classification of iron and steel materials as per the JIS standard, These tables include the AISI/SAE steel grades and ASTM specifications that are similar to the JIS steel grades. Typical steel grades of medium−carbon steel and special steel are as shown in Tables 2~3. Special steel is further divided into high strength steel, tool steel, and special−use steel. The JIS standard classifies iron and steel materials as in Table 1, in which steel is divided into plain steel, special steel and steel castings. Special steel is of such a grade that contains, besides the 5 elements, higher Mn as compared with carbon steel, or such alloying elements as Ni, Cr, and Mo are also added for its intended use. ![]() Machine structure steel is in this grade. Steel with 0.3~0.6% of C is called medium−carbon steel. For instance, carbon tool steel is in this grade. Steel with 0.6% or more of C is called high−C steel. Steel that contains 0.3% or less of C is called low−C steel or mild steel. These five chemical elements are called the 5 chemical elements of steel. Steel contains Si, Mn, P, and S besides C. ![]()
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