- Confirms that the Cold rolled non-oriented electrical steel meets the IS 648: 2006 standard with respect to magnetic and mechanical quality.
- A must-have certification to perform the sales of CRNO sheets in the Indian market.
- Results in energy saving, less core loss, and better product stability.
- The process is based on sampling, testing, and inspection done by BIS along with surveillance.
- Diligence Certifications handles the approval and documentation process smoothly.
Introduction

It was a Pune based transformer manufacturer who was experiencing repeated failures due to excessive core losses in their products. Upon investigation, it was found that the CRNO sheets being used were not BIS certified as per IS 648:2006. The mistake led the company to costly recalls and production delays. Such events emphasize the importance of using certified materials in electrical manufacturing. Bureau of Indian Standards
BIS Certification for Cold Rolled Non-Oriented Electrical Steel Sheets and Strip – Fully Processed Type (CRNO) as per IS 648:2006 is a quality assurance measure that each sheet complies with exact magnetic, dimensional, and quality standards.
What is IS 648:2006?
IS 648:2006 is an Indian standard that defines the formal and quality criteria for Cold Rolled Non-Oriented (CRNO) Electrically Steel Sheets and Strips – Fully Processed Type. In short, it is a standard that the CRNO laminates have to meet in order to be used as a magnetic core material in the above-mentioned electrical machines.
Key Points:

- The starting point is the chemical and magnetic properties of CRNO steel.
- Besides that, it specifies the thickness, grades, and tolerance limits with great detail.
- The standard makes ideal core losses possible, as low as can be expected, and very high magnetic efficiency.
- It also specifies the surface finish features, the insulating coating, and the flatness.
- It is a means for manufacturers to keep the same standard of quality and performance of their products over time in the electrically-used sector. ISI MARK
Why is BIS Certification Mandatory
- BIS certification is the main element that guarantees CRNO steel is in conformity with IS 648:2006 besides having the necessary magnetic and mechanical properties.
- According to the Quality Control Order of the Ministry of Steel, it is compulsory for manufacturers and importers to have this certification.
- BIS certification is a measure that prevents the market from being flooded with substandard or energy-inefficient electrical steel.
- By doing so, it facilitates the implementation of uniform testing, manufacturing, and quality assurance practices across all producers.
- The BIS label is a kind of assurance to the consumers that the material is safe, efficient, and electrically compatible with the machinery.
Importance & Benefits of BIS Certification
| Importance | Benefits |
| Ensures that CRNO steel is of a quality that meets IS 648:2006 standards | Electrically powered machines can be trusted to work safely and efficiently |
| Substandard or non-compliant materials are discouraged from entering the market | Improves energy saving and decreases the amount of energy dissipated |
| Supports regulatory compliance and product safety | Builds market trust and brand credibility |
| Helps in maintaining the same production and testing standards | Easier exports and approval from government projects |
| Protects end-users and promotes sustainable manufacturing | Ensures long-term equipment durability and reliability |
Step-by-Step Process of BIS Certification

Step1:Documentation
- Firstly, gather details related to company incorporation, GST, and factory licence.
- Write up the manufacturing process flow, machinery list, and QC plan.
- Include calibration certificates and test procedures per IS 648:2006.
- Ensure all documents are verified and ready for BIS scrutiny.
Step 2: Product Testing
- Get CRNO steel samples from a lab recognised by BIS or NABL accredited.
- Perform the tests for core loss, permeability, coating, and chemical composition.
- Evaluate the results against IS 648:2006 standards for full compliance.
- Keep the original reports for the submission and checking during the audit.
Step 3: Application Submission
- Submit the BIS application online via the BIS portal.
- Upload documents, product details, and test reports.
- Pay application and testing fees as applicable.
- Await acknowledgement and initial document verification by BIS.
Step 4: Scrutiny and Inspection
- BIS officials review technical documents and test results.
- Factory inspection is scheduled to verify production and testing setup.
- Inspectors assess raw material sourcing, process control, and record maintenance.
- Non-conformities, if found, must be rectified before approval.
Step 5: Grant of Licence
- BIS issues the licence after successful testing and inspection.
- The manufacturer can mark CRNO steel with the ISI mark.
- The licence includes product grade, scope, and validity period.
- Regular BIS surveillance audits ensure consistent quality compliance.
Documents required for BIS Certification
| Category | Documents Required |
| Company Details | Incorporation certificate, GST/Udyam registration, factory licence |
| Manufacturing Info | Process flow chart, machinery list, production capacity details |
| Quality Control | QC manual, internal test records, calibration certificates |
| Product Details | Grade, size, and specification sheet as per IS 648:2006 |
| Testing Reports | NABL/BIS lab test reports confirming standard compliance |
| Factory Proof | Land ownership/lease deed, factory layout plan |
| Personnel Info | Details of technical and quality control staff |
| Raw Material | Supplier certificates, chemical composition test data |
| Marking & Packaging | Sample label showing ISI mark and licence number |
| Authorization | Letter of authorization for BIS liaison or signatory |
Timelines, Costs, Validity & Renewal
- Timelines: The timelines are usually 30-45 days for manufacturers who are local to India.
- Costs: The costs are the money required for the application, testing, and inspection as per the BIS standards.
- Validity: The license is valid for two years from the date of issuance.
- Renewal: The license can be renewed for another five years at most with continued compliance.
Why Choose Diligence Certifications
- Expert consultants specialising in BIS certification for CRNO steel under IS 648:2006
- End-to-end support from document preparation to licence grant
- Strong coordination with BIS officials for faster approvals
- Proven track record with minimal non-conformities or rejections
- Transparent process ensuring full compliance and timely certification
Conclusion
BIS Certification for Cold Rolled Non-Oriented Electrical Steel Sheets and Strips under IS 648:2006 is a guarantee that each sheet is in line with the safety, performance, and efficiency standards laid down by the nation. This is extremely important for the factories that produce the materials for the electrical and transformer industries, where the quality of the product is the main factor that determines the energy efficiency and reliability. Working with Diligence Certifications makes it not only easy but also comfortable from the time the documents are prepared until the approval is obtained, thus ensuring that your products are reliable, compliant, and ready for the market.
Frequently Ask Questions
What is BIS certification for CRNO steel?
BIS certification is a requirement that defines the compliance of Cold Rolled Non-Oriented (CRNO) Electrical Steel Sheets and Strips with the IS 648:2006 standards relating to their magnetic and mechanical properties.
Who needs BIS certification under IS 648:2006?
The manufacturers and importers of CRNO steel sheets and strips who are producing or importing the goods for the Indian market are obliged to get BIS certification.
Why is BIS certification important for CRNO steel?
BIS certification is the main quality control factor, which contributes to Energy efficiency and keeps the market free from low-quality electrical steels.
What tests are required for BIS certification under IS 648:2006?
They are centered around magnetic core loss, permeability, surface finish, thickness measurement and chemical composition.
How long does it take to get BIS certification for CRNO steel?
Local manufacturers are able to get the certification in 30–45 days if the condition is favorable whereas foreign applicants need 120–180 days.
What documents are needed for the BIS certification process?
The documents include company registration, manufacturing process, test
reports, quality control records, factory layout, and authorization letter.
How long is the BIS licence valid?
The licence issued by BIS will carry validity for 2 years from the date of issue and It can be renewed for up to 5 years, provided the compliance is maintained.
Can foreign manufacturers apply for BIS certification?
Based on BIS rules, a foreign manufacturer can submit an application through an Authorized Indian Representative (AIR).
What happens if a product fails BIS testing?
If sample testing of the product results in failure, then the applicant should implement
corrective measures, obtain another sample, and submit it for testing before getting BIS approval.
How can Diligence Certifications help with BIS certification?
Diligence Certifications is providing a complete package that covers all steps of the
process from the very beginning to the end including document preparation, test coordination, submission, and audit support for a quick and hassle-free
certification.
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