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JIS Standard

Name: Alloy steel tubes for machine purposes;
Scope: This Japanese Industrial Standard specifies requirements for the alloy steel tubes used for machinery, automobiles, and other machine parts;
Dimensions: –;
Grade:
Manganese steel: SMn420TK, SMn433TK, SMn438TK, SMn443TK;
Manganese chromium steel: CSMn420TK, CSMn443TK;
Chromium steel: SCr415TK, SCr420TK, SCr430TK, SCr435TK, SCr440TK, SCr445TK;
Chromium molybdenum steel: SCM415TK, SCM418TK, SCM420TK, SCM421TK, SCM425TK, SCM430TK, SCM432TK, SCM435TK, SCM440TK, SCM445TK, SCM822TK;
Nickel chromium steel: SNC236TK, SNC415TK, SNC631TK, SNC815TK, SNC836TK;
Nickel chromium-molybdenum steel: SNCM220TK, SNCM240TK, SNCM415TK, SNCM420TK, SNCM431TK, SNCM439TK, SNCM447TK, SNCM616TK, SNCM625TK, SNCM630TK, SNCM815TK;
Aluminium chromium molybdenum steel: SACM645TK;
Download: JIS G 3441 – 2021;

Name: Carbon steel tubes for general structure;
Scope: This Japanese Industrial Standard specifies requirements for the carbon steel tubes, used for civil engineering and architecture such as steel towers, scaffoldings, footing piles, foundation piles, and piles for landslide suppression;
Dimensions: 21.7 mm – 1016.0 mm;
Grade: STK290, STK400, STK490, STK500, and STK540;
Download: JIS G 3444 – 2021;

Name: Carbon steel tubes for machine structure;
Scope: This Japanese Industrial Standard specifies requirements for carbon steel tubes used for machinery, automobiles, bicycles, furniture, appliances, and other machine parts;
Dimensions: –;
Grade: Grade 11 A, Grade 12 A, Grade 12 B, Grade 12 C, Grade 13 A, Grade 13 B, Grade 13 C, Grade 14 A, Grade 14 B, Grade 14 C, Grade 15 A, Grade 15 C, Grade 16 A, Grade 16 C, Grade 17 A, Grade 17 C, Grade 18 A, Grade 18 B, Grade 18 C, Grade 19 A, Grade 19 C, Grade 20 A;
Download: JIS G 3445 – 2021;

Name: Carbon steel pipes for ordinary piping;
Scope: This Japanese Industrial Standard specifies the requirements for carbon steel pipes used for the conveyance of steam, water (except public water supply service), oil, gas, air, etc. at comparatively Low working pressures;
Dimensions: 10.5 mm – 508.0 mm;
Grade: SGP;
Download: JIS G 3452 – 2019;

Name: Carbon steel pipes for pressure service;
Scope: This Standard specifies the carbon steel pipes used for pressure service at temperatures up to about 350 °C. It is not applicable to pipes for high-pressure service;
Dimensions: 6A – 650A (1/8B – 26B);
Grade: STPG370 and STPG410;
Download: JIS G 3454 – 2017;

Name: Carbon steel pipes for high-pressure service;
Scope: This Standard specifies the carbon steel pipes used for high-pressure service at temperatures 350 ℃ or lower mainly used for machine parts;
Dimensions: 6A – 650A (1/8B – 26B);
Grade: STS370, STS410, and STS480;
Download: JIS G 3455 – 2020;

Name: Carbon steel pipes for high-temperature service;
Scope: This Standard specifies requirements for the carbon steel pipes used mainly for service at temperatures over 350 ℃;
Dimensions: 10.5 mm – 660.4 mm;
Grade: STPT370, STPT410, and STPT480;
Download: JIS G 3456 – 2019;

Name: Arc welded carbon steel pipes;
Scope: This Japanese Industrial Standard specifies requirements for the arc welded carbon steel pipes used for piping for the steam, water, gas, air, etc. of comparatively low working pressure;
Dimensions: 350A – 2000A (14B – 80B);
Grade: STPY400;
Download: JIS G 3457 – 2020;

Name: Alloy steel pipes;
Scope: This Standard specifies requirements for the alloy steel pipes mainly used for piping at elevated temperatures;
Dimensions: 6A – 650A (1/8B – 26B);
Grade:
Molybdenum steel pipe: STPA12;
Chromium-molybdenum steel pipe: STPA20, STPA22, STPA23, STPA24, STPA25, STPA26;
Download: JIS G 3458 – 2020;

Name: Steel pipes for low-temperature service;
Scope: This Standard specifies requirements for the steel pipes used for piping at extremely Iow temperatures of freezing point or under;
Dimensions: 6A – 650A (1/8B – 26B);
Grade:
Carbon steel pipe: STPL380;
Nickel steel pipe: STPL450, STPL690;
Download: JIS G 3460 – 2022;

Name: Carbon steel tubes for boiler and heat exchanger;
Scope: This Standard specifies requirements for the carbon steel tubes used for exchanging heat between the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes, tubes used for air preheater, etc., of boilers, and heat exchanger tubes, condenser tubes, and catalyzer tubes, etc., used in chemical and petroleum industries. It is not applicable to the steel tubes for fired heater and steel heat exchanger tubes for low-temperature service;
Dimensions: 15.9 mm – 139.8 mm;
Grade: STB340, STB410, STB510;
Download: JIS G 3461 – 2023;

Name: Alloy steel tubes for boiler and heat exchanger;
Scope: This Standard specifies requirements for the alloy steel tubes used for exchanging heat between the inside and outside of the tube, such as water tubes, smoke tubes, superheater tubes air preheater tubes, etc. boilers, and heat exchanger tubes, condenser tubes and catalyzer tubes, etc. used in chemical and petroleum industries. It is not applicable to the steel tubes for fired heater and steel heat exchanger tubes for low-temperature service;
Dimensions: 15.9 mm – 139.8 mm;
Grade:
Molybdenum steel tube: STBA12, STBA13;
Chromium-molybdenum steel tube: STBA20, STBA22, STBA23, STBA24, STBA25, and STBA26;
Download: JIS G 3462 – 2019;

Name: Carbon steel tubes for building structure;
Scope: This Japanese Industrial Standard specifies requirements for the carbon steel tubes mainly used for building structures;
Dimensions: 114.3 mm – 1000.0 mm;
Grade: STKN400W, STKN400B, STKN490B;
Download: JIS G 3475 – 2021;