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 　　SUS304/2B is a Japanese standard 2B surface 304 stainless steel cold-rolled plate 　　SUS304 is a Japanese standard stainless steel grade. 　　SUS is the prefix for the stainless steel grade specified in the Japanese standard, while 304 is a term borrowed from American stainless steel materials. 　　2B surface is one of the surface processing types of steel plates, belonging to the category of cold rolling. The 2B surface is a commonly used surface processing method that uses a polishing roller to flatten the heat treated and dephosphorized steel plate on the basis of the 2D surface. It can be used for most purposes. Compared to 2D surfaces, 2B surfaces are smooth and straight.

 　　The commonly used steel grades for Japanese standard seamless steel pipes include STPY41, STPG38, STB30, STB33, STB35, STPT42, etc. The corresponding domestic materials are No. 10 and No. 20 steel. Japanese standard seamless steel pipes are made from steel ingots or solid billets that are perforated into tubes, and then hot rolled, cold rolled, or cold drawn. With a hollow cross-section, it is widely used for conveying fluids in pipelines. Compared with solid steel such as round steel, steel pipes have a lighter weight when their bending and torsional strength are the same. 　　S is STEEL, U is USE, S is sustainless, and Japanese welded pipe standards include JIS G3446, 3447, 3448, 3459, 3468, and 3463

 　　 SM520/SM570 steel plate is a grade that belongs to Japanese industrial standards and is equivalent to low alloy high-strength plate. The execution standard of SM520/SM570 is the Japanese standard JISG 3106-2008 "Rolled Steel Plates for Welded Structures". SM570 is also a grade in this standard, with the highest strength level in the standard. Wuyang Iron and Steel in China can produce this type of steel. The delivery status of SM570 is generally hot rolled, normalized or normalized rolled. If required for heat treatment, the steel can be subjected to normalizing, quenching and tempering, or tempering heat treatment. In addition, according to the agreement between the supply and demand parties, heat treatment such as controlled rolling and cooling can also be carried out.

　　 STK500 is a Japanese material grade and executive standard (JIS-G3444-2006_ Carbon Steel Pipe for General Structures). Mechanical properties: tensile strength ≥ N/mm2500, yield ≥ N/mm2355, chemical composition: C ≤ 0.24Si ≤ 0.35Mn0.3-1.3P ≤ 0.04S ≤ 0.04. The material is equivalent to Q355 material in China. 　　10. The SM520B steel plate belongs to the Japanese standard low alloy high-strength structural steel plate. The SM520 steel plate is similar to the Q355 series steel plate in the national standard. SM520 steel plates of the same series: SM520A, SM520B, SM520C, SM520D. Thickness 8-150mm: yield strength MPa: ≥ 365; Tensile strength MPa: 520-640; Elongation%: ≥ 19

 　　 SGP represents galvanized steel pipe, corresponding to the domestic standard GB/T3091-93 "Galvanized Welded Steel Pipe for Low Pressure Fluid Transportation". STPG370 is a seamless steel pipe with a tensile strength of 370N/mm ^ 2 or higher according to the Japanese standard. Equivalent to China's No. 20 steel. 　　The 20 # seamless steel pipe is made from steel ingots or solid pipe blanks that are perforated into a capillary, and then hot rolled, cold rolled, or cold drawn. The 20 # seamless steel pipe plays an important role in China's steel pipe industry.

 　　1. STK in STK400 is the abbreviation for carbon structural steel pipe. There is no corresponding brand in our country, and we can choose seamless steel pipes for structural purposes according to the national standard GB/T8162 according to the usage requirements. 　　2. STKM13A is also a carbon structural steel pipe, equivalent to the 20 # steel pipe in China's international GB/T8162 standard. 　　3. STKR400 is a carbon structural steel square or rectangular steel pipe, which does not have a corresponding brand in China. According to the usage requirements, seamless steel pipes for structural purposes can be selected according to the national standard GB/T8162.

 　　1. SM490A is produced by large steel mills such as Baosteel and is equivalent to Q355B. 　　2. SM490YA is a high-strength welded structural steel used for bridges, ships, vehicles, oil storage tanks, containers, and other structural components that require excellent welding performance. It is commonly used for welding containers. Equivalent to China's high weathering structural steel Q345GNHL. 　　3. SM570TMC is a structural steel that can achieve high tension without quenching and tempering. Through online heat treatment technology, it mainly uses accelerated cooling process (OLAC) and the addition of trace alloying elements (Nb, Ti, V) to achieve comprehensive mechanical properties of the steel. It is also known as microalloyed non quenched and tempered steel. Currently, there is no steel factory in China to produce it, and there is no equivalent or corresponding grade. Although there are non quenched and tempered structural steel grades and standards in China, such

 　　 STKM13A is a Japanese brand, equivalent to Q275 in China 　　It has high strength, good plasticity and cutting performance, and certain welding performance. Small parts can be hardened and strengthened. 　　In general, there is no hardness requirement, only strength requirement, tensile strength (b/MPa): 490-630 　　Generally, 20 steel or 20Mn is used instead. If it is an important component, it is recommended to compare the mechanical properties and chemical composition of the two material samples.

 　　 STKM - Carbon steel pipes and carbon steel pipes for mechanical structures. 　　The detailed explanation of STEEL TUBE KOZO MACHINE is as follows: 　　The first S is the abbreviation for steel; 　　T (Tube) represents a tube; 　　K: Kozo (pronounced in Japanese, meaning "construction"); 　　M: Machine machinery. 　　Related carbon steel pipe products include STKM 11A, STKM 12A, STKM 12B, STKM 13A, STKM 13B, etc.

 　　 S45C 　　The Japanese JIS standard steel grade has a composition close to the national standard 45 steel. 45 steel, as a commonly used high-quality carbon structural steel, has a wide range of uses 　　S20C is a high-quality carbon structural steel material according to the Japanese JIS standard. Equivalent to China's high-quality carbon structural steel 20 # steel, it is generally replaced with China's high-quality carbon structural steel 20 # steel. 　　Carbon plate steel plate grade: S10C S12C S15C S17C S20C S22C S25C S28C S30C S33C S35C S38C S40C S43C S45C S48C S50C S53C S53C S53C S55C S55C

 　　 SPHC - The first S is the abbreviation for Steel, P is the abbreviation for Plate, H is the abbreviation for Hot Heat, and C is the abbreviation for Commercial. Generally, hot-rolled steel plates and strips are used. 　　3. SPHD - represents hot-rolled steel plates and strips for stamping. 　　4. SPHE - represents hot-rolled steel plates and strips for deep drawing. 　　5. SPCC - Refers to the general use of cold rolled carbon steel sheets and strips, equivalent to Q195-215A grade. The third letter C is the abbreviation for Cold. When conducting tensile tests, it is necessary to add T at the end of the grade as SPCCT.

 　　In the grades of Japanese steel (JIS series), ordinary structural steel mainly consists of three parts to represent the material. 　　For example, S (Steel) represents steel, F (Ferrim) represents iron; The second part represents different shapes, types, and uses, such as P (Plate) for plates, T (Tube) for tubes, and K (Kogu) for tools; The third part represents the characteristic number, which is generally the tensile strength. For example, SS400 represents Steel, the second S represents Structure, 400 represents the lower limit tensile strength of 400MPa, and the overall represents ordinary structural steel with a tensile strength of 400MPa.

 　　 GOST 27772-2015 Golden Globe Awards: 　　C235、C245、C275、C345T、C375T、C255、C285、C345T、C375T、C345、C375、C390T、C345K、C390K、C440、C590、C590K。 　　GOST54157-2010 Regulation: 　　Kπ205、Kπ215、Kπ245、Kπ275、Kπ290、Kπ320、Kπ360、Kπ390、Kπ420、Kπ460。 　　CTO-20-93 (* * * New Balancer Workflow 　　Ct0、C235、C245、C275、C255、C285、C345、C345

 　　 Russian GOST 5781-82 standards A400C, A500C, A600C 　　Russian standard threaded steel bars/GOST 5781-82 standard 　　1. Ribbed steel bars are divided into three yield strength levels based on mechanical properties: A400C 　　A500C、A600C。 Nominal size: 6-40mm. 　　Russian Steel Bar Standard Note: 　　For steel bars with a diameter greater than 32mm and strength grades A400C and A500C, it is allowed to 　　The carbon content increased to 0.26% (0.27%) and the carbon content Ce increased to 0.55 (0.57).

 　　 GOST9941-81 ，GOST8374-75，GOST 8731-74, 8732-78 (st.10, 20, 09G2S)，GOST 550-75

 　　GOST 10704-91，GOST 10705-80，GOST 10706   GOST C90 　　Ø 57-530 mm 　　Russian Standard GOST 10704 Arc-welded straight seam steel pipe . Range of sizes LSAW 　　Similar standards in China are GB/T 30063-2013 Structural use of straight seam submerged arc welded steel pipes, which can also comply with applicable standardsGB/T3091-2008Production standard for low-pressure fluid steel pipes GB/T9711.1-2 -1997 Standard for the production and use of petroleum and natural gas steel pipes。 　　C345 C355 ERW pipe Russian Standard GOST10705-50 　　GOST 20295standard K55/K52/K56 Longitudinally welded pipes 　　C355Equivalent to domestic Q355 　　K52amount to Q460

 　　 GOST standard is one of the most widely used national standards along the the Belt and Road. 　　Currently, countries that fully or partially adopt GOST standards include Russia, Belarus, Moldova, Kazakhstan, Azerbaijan, Armenia, Uzbekistan, Tajikistan, Georgia, and Turkmenistan 　　GOST standard (Russian: ГОСТ)， It is a standard established by the former Soviet government and a part of the national standards strategy of the former Soviet Union. 　　GOST is the abbreviation for gosudarstvennyy standart (Russian: государственный стандарт)， It means national standards. 　　GOST includes all mandatory standards, such as drafting rules in design documents, and regulations on food formula and nutritional composition during the Old Soviet era. 　　GOST has a relatively high level of importance and wide recognition in the Commonwealth of Independent States (CIS) with standard jurisdiction

  Specifications Height Leg width Waist thickness Cross-sectional area （cm²） Physiognomy 5# 50 37 4.5 6.928 5.438 6.3# 63 40 4.8 8.451 6.634 6.5# 65 40 4.3 6.709 8# 80 43 5.0 10.248 8.045 10# 100 48 5.3 12.748 10.007 12# 120 53 5.5 12.059 12.6 126 53 5.5 15.692 12.319 14#a 140 58 6.0 18.516 14.535 14#b 140 60 8 21.316 16.733 16#a 160 63 6.5 21.962 17.24 16#b 160 65 8.5 25.162 19.752 18#a 180 68 7 25.699 20.174 18#b 180 70 9 29.299 23 20#a 200 73 7 28.837 22.637 20#b 200 75 9 32.837 25.777 22#a 220 77 7 31.846 24.999 22#b 220 79 9 36.246 28.453 25#a 250 78 7 34.917 27.41 25#b 250 80 9 39.917 31.335 25#c 250 82 11 44.917 35.26 28#a 280 82 7.5 40.034 31.427 28#b 280 84 9.5 45.634 35.832 28#c 280 86 11.5 51.234 40.219 30#a 300 85 7.5 34.463 30#b 300 87 9.5 39.173 30#c 300 89 11.5 43.883 32#a 320 88 8 48.513 38.083 32#b 320 90 10 54.913 43.107 32#c 320 92 12 61.313 48.131 36#a 360 96 9 60.910 47.814 36#b 360 98 11 68.110 53.466 36#c 360 100 13 75.310 59.118 40#a 400 100 10.5 75.068 58.928 4