ASTM A193 Grade B8ML4CuN & B8ML4CuNA Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8ML4CuN and B8ML4CuNA (High-Copper 317L / UNS S31730). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This ASTM A193 B8ML4CuN / B8ML4CuNA MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for highly specialized, acid-resistant austenitic stainless steel fasteners shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S156/26-XX and corresponding ASTM specifications.
- Advanced High-Copper Chemistry: Detailed breakdowns verifying the massive addition of 4.00% - 5.00% Copper (Cu) combined with 3.00% - 4.00% Molybdenum (Mo) and elevated Nickel (15.00% - 16.50%). This highly specialized matrix delivers elite, unparalleled resistance to hot sulfuric acids, phosphoric acids, and other strong reducing media where standard 316L or 317L would rapidly corrode.
- Low-Carbon Compliance: Restricted Carbon (0.030% max) completely eliminates the risk of chromium carbide precipitation and sensitization during high-temperature service or welding.
- Solution Treatment Verification: Confirms the material is carbide solution treated. For B8ML4CuNA (Class 1A), it specifically verifies the treatment occurred in the finished condition, ensuring optimum toughness and a stress-free microstructure.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8ML4CuN & B8ML4CuNA MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S156/26-XX
TC Date
02.05.20XX
Material Spec
ASTM A193 Grade B8ML4CuNA Class 1A UNS S31730
Bar Shape / Size
Hex Bolt / M20
Dimensions / Item
Heavy Hex Bolt M20-2.5P x 100 mm
Quantity
40.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Mo | Cu | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.025 | 1.50 | 0.025 | 0.005 | 0.50 | 18.00 | 15.80 | 3.50 | 4.50 | 0.035 | Rem |
| Max: 0.030 | Max: 2.00 | Max: 0.040 | Max: 0.010 | Max: 1.00 | 17.00-19.00 | 15.00-16.50 | 3.00-4.00 | 4.00-5.00 | Max: 0.045 | Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 520.00 | 220.00 | 45.00 | 84, 85, 83 |
| Min: 480 | Min: 175 | Min: 35 | Max: 90 (B8ML4CuNA) Max: 96 (B8ML4CuN) |
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 B8ML4CuN / B8ML4CuNA UNS S31730 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 B8ML4CuNA)
- 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 B8ML4CuN & B8ML4CuNA MTC Certificate
Why does B8ML4CuN have such a high Copper content (4% - 5%)?
While Molybdenum provides excellent resistance to localized pitting in chloride environments, it does not fully protect against strong reducing acids. The massive 4.00% - 5.00% addition of Copper in UNS S31730 (often compared to proprietary alloys like 317CU) fundamentally alters the alloy's behavior, making it uniquely resistant to aggressive sulfuric, phosphoric, and acetic acid environments commonly found in the chemical processing industry.
What is the difference between Grade B8ML4CuN and B8ML4CuNA?
Grade B8ML4CuN (Class 1) is carbide solution treated before the final machining and threading processes. Grade B8ML4CuNA (Class 1A) is carbide solution treated in the finished condition. 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 B8ML4CuN 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.