ASTM A193 GRADE B8CLN & B8CLNA BOLTS – MTC
ASTM A193 Grade B8CLN & B8CLNA Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8CLN and B8CLNA (Low-Carbon, Nitrogen-Strengthened, Columbium-Stabilized 347 / UNS S34751). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This ASTM A193 B8CLN / B8CLNA MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for ultra-specialized, highly stabilized austenitic stainless steel fasteners shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S132/26-XX and corresponding ASTM specifications.
- Triple-Threat Chemistry: Detailed breakdowns verifying the ultimate combination for harsh environments: 1) Low Carbon (0.030% max) to prevent sensitization, 2) Columbium (Niobium) stabilization to lock up any residual carbon and prevent intergranular corrosion, and 3) Nitrogen addition (0.10% - 0.16%) to radically boost structural yield strength.
- Solution Treatment Verification: Confirms the material is carbide solution treated. For B8CLNA (Class 1A), it specifically verifies the treatment occurred in the finished condition, ensuring optimum toughness and a stress-free microstructure after machining.
- Enhanced Yield Strength Properties: Comprehensive reporting of Tensile Strength (Min 550 MPa), an upgraded Yield Strength (Min 240 MPa—significantly higher than standard B8C), Elongation (Min 30%), and controlled maximum Hardness (96 HRB for B8CLN, 90 HRB for B8CLNA).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8CLN & B8CLNA MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S132/26-XX
TC Date
15.10.20XX
Material Spec
ASTM A193 Grade B8CLNA Class 1A UNS S34751
Bar Shape / Size
Hex Bolt / M24
Dimensions / Item
Hex Bolt M24-3.0P x 120 mm
Quantity
120.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Cb+Ta | N | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 0.022 | 1.45 | 0.025 | 0.010 | 0.50 | 17.50 | 10.50 | 0.50 | 0.14 | Rem |
| Max: 0.030 | Max: 2.00 | Max: 0.045 | Max: 0.030 | Max: 1.00 | Min: 17.00 Max: 19.00 |
Min: 9.00 Max: 13.00 |
Min: 10xC Max: 1.00 |
Min: 0.10 Max: 0.16 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 590.00 | 270.00 | 42.00 | 84, 85, 83 |
| Min: 550 | Min: 240 | Min: 30 | Max: 90 (B8CLNA) Max: 96 (B8CLN) |
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 B8CLN / B8CLNA UNS S34751 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 B8CLNA)
- 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 B8CLN & B8CLNA MTC Certificate
Why combine Low Carbon, Columbium, and Nitrogen?
This triple combination creates an elite tier of austenitic stainless steel (UNS S34751). The Columbium (Niobium) stabilizes the steel to prevent intergranular corrosion at high temperatures. The Low Carbon (max 0.030%) ensures there is barely any carbon available to precipitate during welding, providing a secondary defense against sensitization. Finally, because lowering carbon reduces the metal's strength, Nitrogen is added as a solid-solution strengthener to boost the yield strength back up to high-performance levels.
What is the difference between Grade B8CLN and B8CLNA?
Grade B8CLN (Class 1) is carbide solution treated before the final machining and threading processes. Grade B8CLNA (Class 1A) is carbide solution treated in the finished condition. Solution treating the completely formed bolt removes residual stresses generated during cold working or threading. This guarantees maximum resistance to stress-corrosion cracking and maintains a strict 90 HRB maximum hardness limit, whereas B8CLN 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.