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If you are manufacturing, importing, or dealing in Grain Oriented Electrical Steel (CRGO) for the Indian market, you don’t need a lecture on why quality matters. You need to know how to clear the regulatory hurdles so you can keep doing business.
The Bureau of Indian Standards (BIS) has made the ISI Mark mandatory for CRGO steel sheets and strips under IS 3024:2015. This isn't optional. If your product doesn't carry the Standard Mark it cannot be sold in India
This guide explains exactly what IS 3024 entails, the technical parameters you must hit and the direct path to getting your license
IS 3024:2015 is the Indian Standard specifically for Cold Rolled Grain Oriented (CRGO) Electrical Steel Sheet and Strip
These are low-carbon, silicon-iron alloys (typically around 3% silicon) used primarily in transformer cores. The "grain-oriented" part means the material has been processed to have optimal magnetic properties in the direction of rolling. This results in low core loss and high permeability which is critical for energy efficiency in transformers
The standard covers flat-rolled, fully processed sheets or strips. It mandates that the material must be coated on both sides with inorganic insulation to withstand stress-relief annealing
To get certified, your product isn't just checked for "quality" in a vague sense. It is tested against specific, hard numbers. If your material fails these your application is rejected
Here are the non-negotiable technical requirements:
BIS Registration Process in India
The standard classifies CRGO steel into various grades (like M3, M4, M5 etc.) based on their maximum core loss. Your product will be tested to ensure it actually performs at the grade you claim.
|
CRGO Grade |
Nominal Thickness (mm) |
Max Specific Core Loss at 1.5 Tesla (W/kg) |
Max Specific Core Loss at 1.7 Tesla (W/kg) |
Minimum Polarization (Tesla) |
|
M3 |
0.23 |
0.73 |
0.85 |
1.88 |
|
M4 |
0.27 |
0.89 |
1.03 |
1.88 |
|
M5 |
0.30 |
0.97 |
1.11 |
1.88 |
|
M6 |
0.35 |
1.11 |
1.25 |
1.88 |
|
Hi-B Grades |
Various |
Lower than conventional |
Lower than conventional |
> 1.90 |
Getting the license involves a predictable sequence of events. Do not try to skip steps.
1. Documentation Prep.
Before you even login to the BIS portal, have your paperwork ready. BIS officials will scrutinize your manufacturing process to ensure you can produce compliant steel
2. Application Submission.
Submit your application (Form V) online. You will need to pay the application fee and nominate an Authorized Indian Representative (AIR) if you are a foreign manufacturer
3. The Factory Audit
This is the hurdle where most fail. A BIS officer will visit your factory. They are not there for a tour they are there to verify your Quality Control (QC) infrastructure. They will check:
4. Sample Testing
During the audit the officer will select samples of your CRGO steel
5. Grant of License
If the factory audit is clean and the independent lab report confirms your steel meets IS 3024 parameters BIS grants the license. You will receive a CM/L number which you must print on your material
BIS ISI Mark Registration for Grey Iron Casting IS 210:2009
Missing documents delays the process by weeks. Ensure you have these files ready:
We see manufacturers make the same mistakes repeatedly. Avoid these to ensure a smooth approval:
Obtaining the BIS ISI mark for IS 3024 CRGO steel is a regulatory necessity but it is also a badge of trust. In a market flooded with second-hand or sub-standard electrical steel the ISI mark distinguishes your product as genuine, new and efficient. Get help from experts like Agile Regulatory and apply with confidence.
Nishi Chawla
22 Nov, 2025
Nishi Chawla
20 Nov, 2025
Nishi Chawla
20 Nov, 2025
Nishi Chawla
19 Nov, 2025
Nishi Chawla
19 Nov, 2025
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