ISO 898-1 Class 12.9
ISO 898-1 Class 12.9 Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ISO 898-1 Class 12.9. Inspect the exact documentation your QA and engineering teams will receive with every ultra-high-strength alloy steel bolt order.
What's Inside This Class 12.9 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for ultra-high tensile strength alloy steel fasteners shipped from our facilities.
- Full Traceability: Certified with TC No.: B12/26-XX and corresponding ISO 898-1 specifications.
- High-Strength Chemistry: Detailed breakdowns verifying the precisely controlled Carbon (0.28–0.50%) and alloying elements (Chromium, Molybdenum, etc.) required to guarantee deep hardenability and structural integrity.
- Verified Heat Treatment: Explicit documentation of the Quenched and Tempered process. The material is tempered at a minimum of 425°C to achieve optimal strength while mitigating extreme brittleness.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (1250.00 MPa), Yield Strength (1145.00 MPa), Elongation (10.50%), and Hardness (40, 42, 41 HRC) per strict ISO 898-1 Class 12.9 limits.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ISO 898-1 Class 12.9 MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
B12/26-XX
TC Date
14.11.20XX
Material Spec
ISO 898-1 Class 12.9-2023
Bar Shape / Size
Hex Bolt / M16
Dimensions / Item
Hex Head Bolt M16-2.0P x 80 mm
Quantity
2000 NOS
Chemical Composition %
| C | Mn | P | S | B | Cr | Mo | Fe |
|---|---|---|---|---|---|---|---|
| 0.40 | 0.85 | 0.015 | 0.010 | 0.001 | 1.05 | 0.25 | Rem |
| Min: 0.28 Max: 0.50 |
Report | Max: 0.025 | Max: 0.025 | Max: 0.003 | Alloy | Alloy | Rem |
Mechanical Properties
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.2% Offset (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRC) |
|---|---|---|---|
| 1250.00 | 1145.00 | 10.50 | 40, 42, 41 |
| Min: 1220 | Min: 1100 | Min: 8 | Min: 39 Max: 44 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for structural and mechanical fasteners. The test reports confirm compliance with As Per ISO 898-1 Class 12.9 EDT. 2023 with respect to the tests carried out.
| Standard / Requirement | Confirmation on Certificate |
|---|---|
| Visual Inspection | 100% visual inspection carried out & found free from defects. |
| Safety Requirements | Material is free from radioactive contamination. |
| Weld Repairs | No weld repair Perform. |
| Dimensional Accuracy | All Dimensions are as per PO Specification. |
Certification Details
We confirm that above mentioned Items was Manufactured, Sampled, Tested and Inspected in accordance with the subjected Customer's Purchase Order and as applicable Drawings, Material Specifications, Codes & Standards and the results of the items have been determined to meet the users' requirements.
Documentation Standard
- EN 10204-2004: 3.1 Standard
- Free from radioactive contamination
- Certified ISO 9001: 2015 Company
Heat Treatments
- Quenched and Tempered
- Min. Tempering Temp: 425°C
Testing Conditions
- Chemical, Mechanical & hardness test carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — ISO 898-1 Class 12.9 MTC
What does the "12.9" designation mean on this certificate?
In the metric class system, the first number "12" indicates a nominal tensile strength of 1200 MPa (12 x 100). The second number ".9" indicates that the yield strength is 90% of the nominal tensile strength. As verified in the mechanical properties section, these bolts achieve a minimum tensile strength of 1220 MPa and a minimum yield strength of 1100 MPa.
What heat treatment is required for Class 12.9?
To reach ultra-high strength without becoming dangerously brittle, Class 12.9 fasteners must be manufactured from alloy steel and subsequently quenched and tempered. ISO 898-1 strictly requires a minimum tempering temperature of 425°C, ensuring the material retains sufficient ductility (minimum 8% elongation) for structural applications.
Can Class 12.9 bolts be electro-galvanized?
Because of their extremely high hardness (39-44 HRC), Class 12.9 fasteners are highly susceptible to hydrogen embrittlement. Therefore, traditional electro-plating (like zinc plating) is generally discouraged unless strictly controlled baking procedures are applied immediately after plating to outgas the trapped hydrogen.