ASTM A193 GRADE B8C (AISI 347)
ASTM A193 Grade B8C (AISI 347) Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8C (Columbium Stabilized 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 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.: S190/26-XX and corresponding ASTM specifications.
- Columbium Stabilized Chemistry: Detailed breakdowns verifying the explicit addition of Columbium + Tantalum (Cb+Ta) to the AISI 347 base chemistry. This critical addition stabilizes the steel by preferentially bonding with carbon, preventing chromium depletion and sensitization during welding or high-temperature exposure (425–870°C).
- Solution Treatment Verification: Confirms the material is carbide solution treated (Class 1 condition), ensuring maximum ductility and corrosion resistance.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (Min 515 MPa), Yield Strength (Min 205 MPa), Elongation (Min 30%), and controlled maximum Hardness (96 HRB).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8C MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S190/26-XX
TC Date
05.12.20XX
Material Spec
ASTM A193 Grade B8C Class 1 UNS S34700
Bar Shape / Size
Hex Bolt / M20
Dimensions / Item
Heavy Hex Bolt M20-2.5P x 100 mm
Quantity
100.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Cb+Ta | Fe |
|---|---|---|---|---|---|---|---|---|
| 0.040 | 1.50 | 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) |
|---|---|---|---|
| 560.00 | 245.00 | 45.00 | 84, 85, 83 |
| Min: 515 | Min: 205 | Min: 30 | Max: 96 |
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 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
- 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 MTC Certificate
Why is Columbium (Niobium) added to B8C fasteners?
Grade B8C is 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 does Class 1 mean for Grade B8C?
Class 1 denotes that the fasteners have been carbide solution treated (annealed) but not intentionally strain-hardened. This provides excellent ductility, keeping the maximum hardness to 96 HRB, while providing a minimum yield strength of 205 MPa (30 ksi).
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.