ASTM A193 Grade B8C & B8CA Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8C and B8CA (AISI 347 / UNS S34700). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This ASTM A193 B8C / B8CA MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for Columbium (Niobium) stabilized austenitic stainless steel fasteners shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S105/26-XX and corresponding ASTM specifications.
- Columbium Stabilized Chemistry: Detailed breakdowns verifying the addition of Columbium + Tantalum (Cb+Ta) to the AISI 347 base chemistry. This stabilizes the steel by tying up carbon, rendering it virtually immune to intergranular corrosion and chromium carbide precipitation during welding or high-temperature exposure.
- Solution Treatment Verification: Confirms the material is carbide solution treated. For B8CA (Class 1A), it specifically verifies the treatment occurred in the finished condition to eliminate all residual stresses from cold forging or thread rolling.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (Min 515 MPa), Yield Strength (Min 205 MPa), Elongation (Min 30%), and controlled maximum Hardness (96 HRB for B8C, 90 HRB for B8CA).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8C & B8CA MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S105/26-XX
TC Date
10.02.20XX
Material Spec
ASTM A193 Grade B8CA Class 1A UNS S34700
Bar Shape / Size
Hex Bolt / M24
Dimensions / Item
Hex Bolt M24-3.0P x 120 mm
Quantity
50.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Cb+Ta | Fe |
|---|---|---|---|---|---|---|---|---|
| 0.040 | 1.45 | 0.025 | 0.010 | 0.50 | 17.50 | 10.50 | 0.55 | Rem |
| Max: 0.08 | 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 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 570.00 | 250.00 | 42.00 | 85, 86, 84 |
| Min: 515 | Min: 205 | Min: 30 | Max: 90 (B8CA) Max: 96 (B8C) |
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 B8C / B8CA UNS S34700 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 B8CA)
- 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 B8C & B8CA MTC Certificate
Why is Columbium (Niobium) added to B8C / B8CA fasteners?
Grade B8C and B8CA are manufactured from AISI 347 stainless steel. Columbium (also known as Niobium) is added to stabilize the steel. Similar to titanium in 321 stainless, columbium bonds with carbon during high-temperature exposure (425–870°C). This prevents chromium from depleting at the grain boundaries, providing superior resistance to intergranular corrosion. Columbium is highly preferred over titanium in welding applications because it does not burn off as easily in the welding arc.
What is the difference between Grade B8C and B8CA?
While both are Columbium-stabilized 347 stainless steel, Grade B8C (Class 1) is carbide solution treated prior to final machining and threading. Grade B8CA (Class 1A) is carbide solution treated in the finished condition (after all forming is complete). This final heat treatment removes any residual stresses caused by cold working, resulting in a softer, highly ductile fastener with a strict maximum hardness of 90 HRB (compared to 96 HRB for B8C).
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.