ASTM A193 Grade B8F & B8FA Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8F and B8FA (AISI 303 / UNS S30300). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This ASTM A193 B8F / B8FA MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for free-machining austenitic stainless steel fasteners shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S108/26-XX and corresponding ASTM specifications.
- Free-Machining Chemistry: Detailed breakdowns verifying the intentional addition of Sulfur (S) or Selenium (Se), combined with higher Phosphorus (P). These elements create inclusions that act as chip breakers, vastly improving machinability and reducing tool wear during the production of complex fastener profiles.
- Solution Treatment Verification: Confirms the material is carbide solution treated. For B8FA (Class 1A), it specifically verifies the treatment occurred in the finished condition to eliminate residual stresses from high-speed machining 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 B8F, 90 HRB for B8FA).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8F & B8FA MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S108/26-XX
TC Date
03.03.20XX
Material Spec
ASTM A193 Grade B8FA Class 1A UNS S30300
Bar Shape / Size
Round Bar / 16 mm
Dimensions / Item
Machined Stud M16-2.0P x 80 mm
Quantity
100.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|
| 0.080 | 1.50 | 0.045 | 0.220 | 0.50 | 18.20 | 9.00 | Rem |
| Max: 0.15 | Max: 2.00 | Max: 0.200 | Min: 0.150 | Max: 1.00 | Min: 17.00 Max: 19.00 |
Min: 8.00 Max: 10.00 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 550.00 | 230.00 | 38.00 | 85, 86, 84 |
| Min: 515 | Min: 205 | Min: 30 | Max: 90 (B8FA) Max: 96 (B8F) |
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 B8F / B8FA UNS S30300 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 B8FA)
- 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 B8F & B8FA MTC Certificate
Why is Sulfur (or Selenium) intentionally added to B8F and B8FA?
Grade B8F and B8FA are based on AISI 303, known as a "free-machining" stainless steel. The high levels of Sulfur (minimum 0.15%) or Selenium create inclusions in the metal. When the material is machined or turned, these inclusions cause the metal chips to break off cleanly and easily, reducing friction, lowering tool wear, and allowing for much faster production speeds compared to standard 304 or 316 stainless.
What is the difference between Grade B8F and B8FA?
Grade B8F (Class 1) is carbide solution treated prior to final threading and machining. Grade B8FA (Class 1A) is carbide solution treated in the finished condition. Because 303 stainless is often heavily machined, solution treating the finished part removes any severe residual stresses caused by the cutting tools, ensuring optimal ductility and a strictly controlled maximum hardness of 90 HRB.
Does the free-machining chemistry affect corrosion resistance?
Yes. The sulfur stringers that make the steel easy to machine also provide microscopic initiation sites for corrosion. While B8F/B8FA still offers good oxidation resistance and is suitable for many high-temperature applications, it has slightly lower general corrosion resistance and pitting resistance compared to its non-free-machining counterpart, Grade B8 (AISI 304).