Confirm EN 10204 3.1 wording during RFQ review
BLD Forge Direct
MTC 3.1 Guide for Forged Flange RFQs
MTC 3.1 requirements should be included in the RFQ so material traceability, heat treatment records, test results and inspection documents are aligned before price and lead time are confirmed.
Summary
MTC 3.1 requirements should be included in the RFQ so material traceability, heat treatment records, test results and inspection documents are aligned before price and lead time are confirmed.
Match heat number, material grade and product marking
Check chemical, mechanical, impact and NDT record needs
State third-party inspection requirements before quotation
MTC 3.1 Data Buyers Should Check
| Certificate field | Required evidence | Common mismatch | Buyer action |
|---|---|---|---|
| Heat number | Same heat on forging, marking and MTC | Part marking does not match certificate | Request heat traceability photo/report |
| Material grade | Exact ASTM/EN/GOST grade and condition | A105 supplied where A105N is required | Confirm before production |
| Chemical analysis | C, Mn, Si, P, S and alloy elements | Grade family looks similar but chemistry differs | Review against material standard |
| Mechanical test | Tensile, yield, elongation, reduction where applicable | Missing low-temperature impact record | Add impact requirement in RFQ |
| Heat treatment | Normalizing, Q+T, solution annealing or stress relief | Treatment not listed on MTC | Require heat-treatment record |
| Inspection reference | Dimensional, PMI, UT, MT/PT if specified | Inspection requested after quotation | List inspection scope in first RFQ |
Practical Checklist
Use this list before sending drawings or line items for quotation review.
Required certificate type, such as EN 10204 3.1
Material grade, heat number traceability and product marking
Chemical composition and mechanical test values required by the standard
Heat treatment record, impact test or hardness test if required
Dimensional report, PMI, UT, MT or PT if required by the project
Third-party inspection witness, review or release note
Language, stamp or document format required by your project or end user
Common RFQ Mistakes
These points often cause repeated clarification, price revisions or document mismatch.
- Asking for MTC 3.1 after the order is already priced without documents
- Not matching heat numbers between products, marks and certificates
- Forgetting impact test requirements for low-temperature projects
- Assuming third-party inspection is included without stating it in the RFQ
- Treating a certificate PDF as enough when the project also needs dimensional or NDT reports
Send your RFQ or drawing directly to BLD Forge Direct.
Email quote@bldforgedirect.com with standard, drawing, material, quantity and inspection requirements.