ASTM A193 GRADE B8N & B8NA BOLTS – MTC
ASTM A193 Grade B8N & B8NA Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8N and B8NA (Nitrogen Strengthened 304 / UNS S30451). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This ASTM A193 B8N / B8NA MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for Nitrogen-strengthened austenitic stainless steel fasteners shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S115/26-XX and corresponding ASTM specifications.
- Nitrogen Strengthened Chemistry: Detailed breakdowns verifying the explicit addition of Nitrogen (0.10% - 0.16%) to the standard 304 base. Nitrogen acts as a powerful solid-solution strengthener, significantly increasing the yield strength while improving resistance to localized pitting corrosion.
- Solution Treatment Verification: Confirms the material is carbide solution treated. For B8NA (Class 1A), it specifically verifies the treatment occurred in the finished condition, ensuring optimum toughness and a stress-free microstructure.
- Enhanced Yield Strength Properties: Comprehensive reporting of Tensile Strength (Min 550 MPa), an upgraded Yield Strength (Min 240 MPa—higher than standard B8), Elongation (Min 30%), and controlled maximum Hardness (96 HRB for B8N, 90 HRB for B8NA).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8N & B8NA MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S115/26-XX
TC Date
09.05.20XX
Material Spec
ASTM A193 Grade B8NA Class 1A UNS S30451
Bar Shape / Size
Hex Bolt / M20
Dimensions / Item
Heavy Hex Bolt M20-2.5P x 110 mm
Quantity
60.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | N | Fe |
|---|---|---|---|---|---|---|---|---|
| 0.055 | 1.45 | 0.025 | 0.010 | 0.60 | 18.50 | 8.50 | 0.13 | Rem |
| Max: 0.08 | Max: 2.00 | Max: 0.045 | Max: 0.030 | Max: 1.00 | Min: 18.00 Max: 20.00 |
Min: 8.00 Max: 11.00 |
Min: 0.10 Max: 0.16 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 585.00 | 265.00 | 42.00 | 84, 86, 85 |
| Min: 550 | Min: 240 | Min: 30 | Max: 90 (B8NA) Max: 96 (B8N) |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for fasteners. The test reports confirm compliance with As Per ASME/ASTM A193 Grade B8N / B8NA UNS S30451 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
- Carbide Solution Treated (In Finished Condition for B8NA)
- Quenching Medium: Water quenched
Testing Conditions
- Chemical, Mechanical & hardness test carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — ASTM A193 Grade B8N & B8NA MTC Certificate
Why is Nitrogen added to B8N / B8NA (UNS S30451)?
Nitrogen is intentionally alloyed into standard 304 stainless steel to act as a solid-solution strengthener. This controlled addition (0.10% - 0.16%) noticeably increases both the minimum yield strength (from 205 MPa up to 240 MPa) and minimum tensile strength without sacrificing the excellent ductility or toughness characteristic of austenitic stainless steels. Nitrogen also slightly improves resistance to pitting corrosion in chloride environments.
What is the difference between Grade B8N and B8NA?
Grade B8N (Class 1) is carbide solution treated before the final machining and threading processes. Grade B8NA (Class 1A) is carbide solution treated in the finished condition. Solution treating the completely formed bolt removes residual stresses generated during manufacturing. This guarantees maximum resistance to stress-corrosion cracking and maintains a strict 90 HRB maximum hardness limit, whereas B8N is allowed up to 96 HRB.
Are the materials verified to be free from radioactive contamination?
Yes, the MTC document strictly states that the material has been verified as free from radioactive contamination and has undergone a 100% visual inspection to ensure it is completely free from manufacturing defects before dispatch.