The MTR (or Certificate of Compliance) is a crucial document that provides traceability and proof that the material meets the ordered specifications. For A36 H-beams, verify:
Purchaser & Order Information: Confirms it's for your project.
Product Description: ASTM A36, Shape (e.g., W12x30), Quantity/Length.
Heat Number and Lot/Batch Number: For full traceability.
Chemical Analysis (Heat Analysis): Actual results for C, Mn, P, S, Si confirming they are within A36 limits.
Mechanical Test Results:
Yield Strength (must be ≥ 36 ksi / 250 MPa).
Tensile Strength (must be between 58-80 ksi / 400-550 MPa).
Elongation (must be ≥ 20% in 8 inches).
Test specimen location (e.g., from the web or flange).
Supplementary Test Results (if specified): Such as Charpy V-Notch impact values.
Statement of Compliance: A clear declaration that the material conforms to ASTM A36 and A6.
Testing Standards Used: References to ASTM A370 (mechanical testing) and A751 (chemical analysis).
Cross-referencing this report with the project specifications ensures the received H-beams are fit for their intended structural purpose.