BIS CERTIFICATION FOR TOOL AND DIE STEELS
IS 3748:1990

This standard specifies the requirements for plain carbon and alloy tool and die steel in the form of bars, blanks, rings, and other shapes that can be hardened and tempered for cold and hot working applications.

Steel covered by this standard must be ordered and delivered based on (a) chemical composition or (b) chemical composition and annealed hardness. Unless otherwise agreed in the order, the processes used to make the steel and the product are left to the manufacturer's discretion, but the steel must be fully killed.

Each ingot must have sufficient reductions and discards to ensure that it is free of piping, harmful segregation, and other defects. The material must be roughly machined, chipped, or ground to remove any surface imperfections that may cause defects in the finished products. The material must be free of potentially harmful surface defects such as seams, laps, and cracks. The material must also be free of flaws. Surface decarburization must be completely avoided in all materials supplied in machined and ground conditions.

Tests:

The following test shall be carried out in accordance with the standard.

• Chemical composition
• Hardness
• Dimensional tolerances
• Ultrasonic test
• Additional test

Marking:

Each bar with a diameter greater than 50 mm or with equivalent cross-sectional area shall be stamped or suitably marked at the extreme with the following information: source of the manufacturer and cast number. The Standard Mark may also be applied to the material. Manufacturers must obtain a BIS license from the Bureau of Indian Standards to use a standard mark (ISI Mark). The Bureau grants a license based on a successful assessment of manufacturing infrastructure, production process, and quality control and testing capabilities during a visit to its manufacturing premises.

NOTE:

For Detailed Information about the Procedure for BIS ISI Certification

Conclusion:

If a product falls under the scope of the BIS Conformity Assessment Scheme, All the manufacturers, importers, and foreign entities must obtain BIS ISI Certification. The Bureau may cancel the License if the product fails to meet certification requirements.

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