In this blog, you will learn about What is the difference between 2.2 and 3.1 Material test certificates? The main difference between the 2.2 and 3.1 material certificates lies in the level of verification and confidence they offer. Material Test Certificate is a key document for product quality assurance. Knowing the difference between them is important.
| Type 2.2 MTC | Type 3.1 MTC |
| Declaration Certificate | Inspection by Independent Inspection department of Manufacturer’s |
| Testing as per Manufacturer’s internal testing criteria | Testing as per Standards testing criteria |
| Trust level – Low | Trust level – Medium |
| Non – Specific Inspection | Specific Inspection |
What is Type 2.2 Material Certificate?
The Type 2.2 certificate is a declaration certificate that includes some test results. The main difference is that these tests are conducted based on the manufacturer’s internal testing criteria.
This means that the material procured with this test certificate is a general statement of compliance and indicates that the material meets the basic requirements of the relevant standard. It may include details such as the material’s chemical composition, mechanical properties, and sometimes dimensions.
However, these test results may not be in line with internationally recognized standards, but are based on the manufacturer’s or supplier’s own internal testing and quality control procedures. This is also known as non-specific inspection.
What is Type 3.1 Material Certificate?
On the other hand, the 3.1 certificate is more comprehensive and stringent compared to the 2.2 certificate. It ensures a higher level of quality control and verification processes.
The 3.1 material test certificate, issued by the manufacturer or supplier, states that the material has been tested in accordance with specific standards and confirms the chemical composition, mechanical properties, and other essential parameters.
This verification is conducted by a manufacturer’s authorized inspection agency that is independent from the manufacturing department. It’s important to note that this independent inspection agency is not the same as the independent third-party inspection agency that is external to the manufacturer.
However, the Type 3.1 MTC provides a higher level of confidence and assurance regarding the material’s quality, as it involves material verification and testing in line with recognized material standards. This is also known as specific inspection.
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In summary, the main difference between the 2.2 and 3.1 material certificates lies in the level of verification and confidence they offer. The 2.2 certificate is based on the manufacturer’s internal testing, while the 3.1 certificate involves standard verification.
