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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When the microwelding occurs, the torque of a rotating shaft 2 changes, accompanied by temperature elevation. SUP9A steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Steel is generally more inexpensive as the amounts of alloying elements are smaller. An object of the present invention is to provide jjs compression ring having excellent thermal conductivity and 4081 sag resistance as well as good price competitiveness, which can be used in a high-thermal-load environment in high-compression-ratio engines, and a method for producing such a compression ring.

JIS G – Spring steels (Foreign Standard)

Though the spheroidizing annealing may be conducted in place of the first patenting treatment for higher productivity, attention should be paid to provide the spheroidal cementite with particle sizes in a predetermined range. The number of cycles at that time was used to evaluate the life of h ring. Share on Facebook Share.

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Next Patent Gas turbine engine v Rolling element and method of producing the same. The above composition is basically a steel composition identified by the material number of SUP10 according to JIS Ghaving high thermal conductivity because of a small total amount of alloying elements, though it comprises small amounts of Cr and V.

Image analysis on an enlarged photomicrograph of this structure revealed that the spheroidal cementite had an average particle size of 0.

What is claimed is: A usual measure against knocking is the delaying of ignition timing spark advancebut it makes it impossible to keep high thermal efficiency. In the present invention, the spheroidal cementite has an average particle size of 0.

SUP9A steel ji and suppliers from china. Alloying elements 1 and thermal conductivities of steels for piston rings. Square Round sheet Plate. In view of this, the temperature of ring grooves should be lowered by using high-thermal-conductivity compression rings.

In Example 3 with a manganese phosphate coating, the difference of a substrate did not change the microwelding resistance life. Search Expert Search Quick Search. 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.

To this end, it is most effective to dissipate the heat of pistons to cooled cylinder walls via compression rings. For environmental protection, automobile engines are recently designed to have improved fuel efficiency, low emission and high power, so that engines tend to have high compression ratios and high load.

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A wire used for the production of the compression ring of the present invention is produced by melting steel SUP10 having a composition comprising by mass 0.

The questions will be reply in 24 hours. Alloy to be surface-coated and sliding members. Share on Pinterest Share. Of course, surface treatments such as plating, PVD, etc. This spheroidal cementite is known as residual cementite in spring steel subject to an oil-tempering treatment.

SteelJIS: Japanese Steels and Alloys

Because the heat treatment temperature b time differ depending on the size of a heat treatment furnace and the cross section areas of items to be treated, they should be adjusted such that the spheroidal cementite has preferred particle size and area ratio.

Spring steel superior in workability. Click for automatic bibliography generation. Share on LinkedIn Share.

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Share on Google Plus Share. The method of the present invention for producing a compression ring having a composition comprising by mass 0. The preferred average particle size is 0. Because the residual cementite of about 0.