This standard outlines the specifications for wrought alloy and unalloyed steel bars with a maximum diameter of 40 mm. These bars are intended for use in manufacturing internal combustion engine valves.

The material supply must align with the specified standard's general requirements. Unless stated otherwise in the order, the manufacturing processes for the steel are determined by the manufacturer. The material must be devoid of any potentially detrimental internal and surface imperfections. Steel should be supplied in the agreed-upon heat treatment or surface machining condition between the purchaser and the manufacturer. Additionally, the chemical composition must comply with the specified standards.

TESTS

The subsequent test must be conducted for Steel for Internal Combustion Engines Valves.

• Dimensional tolerances

• Elevated temperature properties

• Chemical composition

• Hardness

• Inclusion rating

• Tensile test

PACKING AND MARKING:

Packing and marking procedures should adhere to the guidelines outlined in IS 7494:1981. Steel bars should be securely bundled, with each bundle featuring a metal tag containing the following information:

• Name and trademark of the manufacturer,

• Steel grade, and

• Cast number or any other identification mark.

The material may also bear the Standard Mark (ISI Mark). Manufacturers are required to acquire a BIS license from the Bureau of Indian Standards to use the standard mark (ISI Mark). This license is granted after assessing manufacturing infrastructure, production processes, and quality control and testing capabilities during an on-site visit to the manufacturing premises by the Bureau.

PROCESS FOR BIS ISI MARK CERTIFICATION