JIS G 4801 PDF

JIS G is standard which specified the spring steel mainly used for the hot formed springs such as the laminated springs, coiled springs. The symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD. See the chemical composition and physical properties of JIS G Grade SUP9A, find alternative materials, and connect with suppliers.

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SteelJIS: Japanese Steels and Alloys

Search Expert Search Quick Search. Because the residual cementite of about 0.

The results are shown in Table 2. The production method of the present invention using mass-produced steel defined by JIS contributes to cost reduction. To meet the above demand, for example, JP A proposes a proper composition comprising C, Si, Mn and Cr, which is defined by parameters in predetermined ranges, for piston rings having excellent thermal conductivity and thermal sag resistance, which are usable as compression rings.

Materials with smaller amounts of alloying elements have higher thermal conductivities.

In the present invention, the spheroidal cementite has an average particle size of 0. Process for the production of hardened parts of steel. From the aspect of wear resistance and microwelding resistance, sliding peripheral surfaces of h steel rings are usually subject to various surface treatments.

For environmental protection, automobile engines are recently designed to have improved fuel efficiency, low gg and high power, so that engines tend to have high compression ratios and high load. About Our Company Otai Special Steel was established in to provide a wide range of high quality steel to the global market.

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Alloy to be surface-coated and sliding members. A SumoBrain Solutions Company. Also, the temperature of ring grooves of an aluminum piston can be lowered, suppressing microwelding and wearing of the ring grooves. Each wire of SUP10 steel rolled to 8 mm in diameter was formed into a rectangular cross-sectioned wire of 1.

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The compression ring of the present invention has a composition comprising by mass 0. In a scanning electron photomicrograph of FIG. SUP9A Spring main used for heavy vehicles, tractors, industrial production load, stress and the diameter of the larger plate spring and helical spring. Also, from the economic point of view, steel used in a large amount, namely, mass-produced like materials defined by JIS Japanese Industrial Standards is inexpensive.

Despite many huge merger deals in the industry, we remain a friendly, family business. Further, not only excellent characteristics but also price competitiveness are required on automobile parts such as piston rings.

The method of the present invention for producing a compression ring having a composition comprising by mass 0. To provide a price-competitive compression ring having excellent thermal conductivity and thermal sag resistance, which can be used in a high-thermal-load environment of high-compression-ratio engines, steel identified by the material number of SUP10 in JIS Gwhich contains small amounts of alloying elements, is used, and a piston ring wire is annealed before an f treatment such that spheroidal cementite having an average particle size of 0.

About 30 min per 25 mm uis ruling section is to be provided and t the steels should be immediately quenched in oil. Click for automatic bibliography generation. The facts that the amount of Si, a solution-strengthening element, is particularly smaller in SUP10 used in the present invention than in Si—Cr steel, and that spheroidal cementite is formed, appear to contribute to the improvement of thermal conductivity by reducing the solid solution of C.

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The extended Mis search report, dated Mar. A compression f consisting of a composition consisting of by mass 0. Spring steel superior in workability. The compression ring of the present invention is obtained from the above wire drawn to have a predetermined cross section shape, usually by forming the wire to a free form ring by a cam machine, conducting a strain-removing heat treatment, and grinding the side surfaces, peripheral surface, gap, etc.

In Example 3 with a manganese phosphate coating, the nis of a substrate jie not change the microwelding resistance life. Ground Spring Steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Image analysis conducted in the same manner 4810 in Example 1 on scanning electron photomicrographs of the wire structures revealed that the spheroidal cementites in Examples 4 and 5 had average particle sizes of 0. The averaged values of the thermal sag resistance were shown in Table 2.

A usual measure against knocking is the delaying of ignition timing spark advancebut jjis makes it impossible to keep high thermal efficiency.

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The present invention relates to a piston ring for automobile engines, ijs to a compression ring used in a high-thermal-load environment in high-compression-ratio engines, and its production method. Of course, a nitriding treatment is also usable. This appears to be due to influence by the surface roughness of the manganese phosphate coating.