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JIS G3445 is one of the Japanese Industrial Standards

Posted:2024-07-23 14:12:43

JIS G3445 is one of the Japanese Industrial Standards, which is mainly used to specify the size, shape, weight, technical requirements, test methods, marking, packaging and quality certification of precision steel pipes. This kind of precision steel pipe is mainly used in the manufacture of machinery and bicycle frames, and is also suitable for automobile cylinder pipes, hydraulic systems and other components. Specifically, the JIS G3445 standard includes four steel grades: STKM11A, STKM12A, STKM12B and STKM13A. These steel grades have different properties and uses to meet the needs of different sectors.

The chemical composition of precision steel pipes under the JIS G3445 standard, such as STKM11, mainly includes carbon (C), manganese (Mn), silicon (Si), phosphorus (P) and sulfur (S). Specifically, for STKM11, its chemical composition requirements are as follows: Carbon (C): ≤0.12%, Manganese (Mn): ≤0.60%, Silicon (Si): ≤0.35%, Phosphorus (P): ≤0.040%, Sulfur (S): ≤0.040%. In addition, according to JIS G3445 standard, Nb and V can also be added, but their total content (Nb + V) should be ≤0.15%.

Precision steel pipes under the JIS G3445 standard mainly adopt the following production methods: tube blank preparation, perforation, rolling and stretching, heat treatment, cooling and straightening, cutting and inspection, surface treatment and packaging.

JIS G3445 has a wide range of applications, including but not limited to the following aspects:

Mechanical field: used in the manufacturing of various mechanical equipment and devices. Automobile manufacturing: used in key components such as automobile frames, suspension systems, and paking systems. Bicycle manufacturing: used in the manufacture of bicycle frames. Furniture and appliance manufacturing: Used to manufacture furniture frames, support structures, and appliance handles, packets and other components. It is also used in the manufacture of other mechanical parts and devices.