Quenched and tempered alloy steel forgings are special metal parts made from strong alloy steel. They go through a two-step heating process to become tough and strong. First, they're heated a lot and then quickly cooled using oil, water, or special liquids. This makes them very hard but a bit brittle. Next, they're heated again, but not as much, and then slowly cooled carefully. This makes them less hard but tougher and less likely to break. These special forgings end up being just right, tough and strong at the same time. They're used in airplanes, cars, oil industry, and buildings where we need strong and reliable parts.

According to IS 12145:1987, forgings are categorized into three grades: I, II, and III, based on chemical composition (C, Mn) and mechanical properties (YS, TS, Elongation, Impact). Grades I and II further have subcategories, I A, I B, II A, and II B, with higher YS for the 'B' grades. Grade III features the lowest carbon content, the highest alloy content, and the highest YS among the three grades.

IS 12145:1987 pertains to quenched and tempered alloy steel forgings for pressure vessels. This standard outlines the requirements for forgings used in pressure vessel components, including vessel closures, flanges, shells, tube sheets, heads, rings, and similar parts within the reactor system.

REQUIREMENTS FOR IS 12145:1987

1.     The general material supply requirements are as per the standard.

2.     Forgings must be made from killed steel produced through primary processes like open hearth, basic oxygen, or electric furnace, with possible secondary processes.

3.     To ensure uniform deformation across sections, forgings should undergo suitable mechanical hot working.

4.     After hot working, forgings must be cooled to achieve complete austenite transformation without any adverse effects like cracking or distortion.

5.     All forgings must undergo heat treatment, including quenching and tempering, followed by slow cooling.

6.     Finished forgings require product analysis to meet mechanical property standards.

7.     Each forging must be stamped with material grade, heat number, manufacturer's mark, and may include the ISI Mark.

8.     Manufacturers must obtain a BIS license from the Bureau of Indian Standards to use the ISI Mark.

TESTS

Tests shall be carried out in accordance with the method prescribed in the standard.

·       Chemical composition analysis

·       Mechanical tests

·       Appearance

·       Shapes, dimensions and tolerances

·       Ultrasonic testing

Process for BIS ISI Mark Certification

To know the process in detail, please visit:

• ISI Mark Certification for Domestic Manufactures
• ISI Mark Certification for Foreign Manufactures

Under BIS Registration Products ISI and CRS

• BIS CRS Registration For IT Products List
• ISI Mark Registration For ISI Products List

Benefits of BIS Certification

The BIS registration provides the following benefits:

1.     Increase sales: BIS-registered products are more likely to be of higher quality and attract more customers.

2.     Reduce the amount of money spent on quality maintenance: Upon getting certification, there's no need to follow separate quality guidelines for products.

3.     Enhance product credibility and reduce environmental risk: BIS-certified items are genuine and trustworthy because they work really well and last a long time.

4.     Ensure the highest level of quality and dependability: The presence of a BIS registration number implies that the product is of high quality and dependability.

5.     Ensure the organization’s expansion: BIS certification boosts your product’s reputation, resulting in significant growth and market exposure.

CONCLUSION

Quenched and tempered alloy steel forgings have been included in the mandatory ISI Certification Scheme under the IS 12145:1987 standard. Manufacturers cannot import, export, or sell this product in the Indian consumer market without the ISI Mark imprinted.

If you need any assistance with BIS ISI registration for Quenched and tempered alloy steel forgings or ISI mark certification for Quenched and tempered alloy steel forgings, you can reach out to Evtlindia. We provide assistance with all documentation formalities with India's BIS office, ensuring a smooth and hassle-free registration experience, guiding you through the entire process from start to finish.

You can contact us via email at contact@evtlindia.com or by phone at 9560935898. Feel free to get in touch with us anytime for the support you need.