ISO 898-1 Grade 8.8
ISO 898-1 Class 8.8 Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ISO 898-1 Class 8.8. Inspect the exact documentation your QA and engineering teams will receive with every high-strength medium carbon steel fastener order.
What's Inside This Class 8.8 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for structural and mechanical high-strength carbon steel fasteners shipped from our facilities.
- Full Traceability: Certified with TC No.: B88/26-XX and corresponding ISO 898-1 specifications.
- Medium Carbon Chemistry: Detailed breakdowns verifying the precisely controlled Carbon (0.25–0.55%) content required to guarantee deep hardenability and structural integrity for general high-strength applications.
- 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 ensuring necessary ductility and toughness.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (865.00 MPa), Yield Strength (680.50 MPa), Elongation (14.50%), and Hardness (26, 28, 27 HRC) per strict ISO 898-1 Class 8.8 limits.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ISO 898-1 Class 8.8 MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
B88/26-XX
TC Date
18.11.20XX
Material Spec
ISO 898-1 Class 8.8-2023
Bar Shape / Size
Hex Bolt / M16
Dimensions / Item
Hex Head Bolt M16-2.0P x 80 mm
Quantity
3000 NOS
Chemical Composition %
| C | Mn | P | S | B | Fe |
|---|---|---|---|---|---|
| 0.35 | 0.75 | 0.015 | 0.010 | 0.001 | Rem |
| Min: 0.25 Max: 0.55 |
Report | Max: 0.025 | Max: 0.025 | Max: 0.003 | Rem |
Mechanical Properties
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.2% Offset (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRC) |
|---|---|---|---|
| 865.00 | 680.50 | 14.50 | 26, 28, 27 |
| Min: 800 | Min: 640 | Min: 12 | Min: 22 Max: 32 |
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 8.8 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 8.8 MTC
What does the "8.8" designation mean on this certificate?
In the metric property class system, the first number "8" indicates a nominal tensile strength of 800 MPa (8 x 100). The second number ".8" indicates that the yield strength is 80% of the nominal tensile strength. As verified in the mechanical properties section, these bolts achieve a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa.
What heat treatment is required for Class 8.8?
To reach high strength characteristics uniformly, Class 8.8 fasteners must be manufactured from medium carbon steel and subsequently quenched and tempered. ISO 898-1 requires a minimum tempering temperature of 425°C, ensuring the material retains sufficient ductility (minimum 12% elongation) for heavy structural applications.
Where are Class 8.8 fasteners typically used?
Class 8.8 is the most common high-strength metric fastener grade. It is the go-to standard for heavy machinery, automotive assemblies, structural steel connections, and general mechanical engineering applications where a reliable balance of high tensile strength and ductility is required.