ASTM F3125 Grade A490 Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM F3125 Grade A490. Inspect the documentation verifying this alloy steel's high-strength tempering and strict mechanical compliance required for critical structural connections.
What's Inside This A490 MTC Certificate
This sample mill test certificate mirrors the QA documentation package required for high-strength A490 structural bolts, engineered for heavy-duty steel construction applications where extreme tension is vital.
- Full Traceability: Certified with TC No.: S490/26-XX and corresponding ASTM F3125 specifications.
- Quenched & Tempered Alloy Chemistry: Detailed breakdowns verifying the alloy composition (typically Cr-Mo or Ni-Cr-Mo) designed to achieve the high strength required for structural joints.
- High-Strength Performance: Explicit verification of minimum tensile strength (1035-1205 MPa depending on diameter) and hardness requirements (33-39 HRC).
- Hydrogen De-embrittlement (HDE): Documentation verifying that the bolts have undergone necessary treatment to prevent hydrogen-induced cracking, which is a critical risk at this hardness level.
- Quality Compliance: 100% visual inspection carried out and verified free from manufacturing defects.
Live Preview: ASTM F3125 A490 MTC Data
Review the standard structural parameters and layout before downloading the full document.
TC Number
S490/26-XX
TC Date
19.05.20XX
Material Spec
ASTM F3125 GRADE A490
Bar Shape / Size
Round Bar / 20 mm
Dimensions / Item
Structural Bolt M20 x 80 mm
Quantity
500.00 NOS
Chemical Composition % (Alloy Steel)
| C | Mn | P | S | Cr | Mo | B |
|---|---|---|---|---|---|---|
| 0.40 | 0.95 | 0.012 | 0.010 | 1.05 | 0.22 | 0.002 |
| 0.30 - 0.48 | Min: 0.60 | Max: 0.035 | Max: 0.040 | Min: 0.35 | Min: 0.15 | Max: 0.003 |
Mechanical Properties
| TENSILE STRENGTH (MPa) | PROOF LOAD (MPa) | % ELONGATION (GL-5d) | HARDNESS (HRC) |
|---|---|---|---|
| 1085.50 | 830.20 | 14.00 | 35, 36, 34 |
| Min: 1035 | Min: 830 | Min: 14% | 33 - 39 |
Standard References & Compliance
Our MTC certificates are strictly audited to ensure structural safety. Test reports confirm compliance with the ASTM F3125 specification, which consolidated previous structural bolt standards (A325 and A490).
| Standard / Requirement | Confirmation on Certificate |
|---|---|
| Visual Inspection | 100% visual inspection carried out & found free from defects. |
| Hydrogen De-embrittlement | Verification of HDE treatment for high-strength compliance. |
| Proof Load Test | Passes standardized proof load testing. |
| Dimensional Accuracy | All Dimensions are as per PO Specification / ASME B18.2.6. |
Certification Details
We confirm that the above mentioned items were Manufactured, Sampled, Tested, and Inspected in accordance with the subjected Customer's Purchase Order and applicable Drawings, Material Specifications, Codes & Standards.
Documentation Standard
- EN 10204-2004: 3.1 Standard
- Free from radioactive contamination
- Certified ISO 9001: 2015 Company
Heat Treatments
- Quenched & Tempered
- Hydrogen De-embrittlement (Baking)
Testing Conditions
- Full batch mechanical & hardness testing
- 100% visual inspection carried out
Technical FAQs — A490 Structural Bolts
What is ASTM F3125?
ASTM F3125 is the current "master" standard that consolidated and replaced several previous structural bolt specifications, including the old ASTM A325 and ASTM A490. Any bolt formerly called an "A490 bolt" is now governed under ASTM F3125 as Grade A490.
Why are A490 bolts restricted in surface coatings?
Due to their high hardness levels (33-39 HRC), A490 bolts are sensitive to Hydrogen Embrittlement. Hot-dip galvanizing or electroplating can introduce hydrogen into the steel, potentially causing catastrophic failure. As a result, A490 bolts are usually restricted to specific types of corrosion protection (like zinc flake coatings) that have been proven to minimize hydrogen uptake.
Can A490 bolts be reused?
No. ASTM A490 bolts are high-strength structural bolts designed for installation in tension. They are considered single-use fasteners. Once they have been fully tightened and reached their design tension, they should not be loosened and re-tightened, nor should they be reused in new connections.