ASTM A193 GRADE B8R & B8RA BOLTS – MTC
ASTM A193 Grade B8R & B8RA Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A193 Grade B8R and B8RA (Nitronic 50 / UNS S20910). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This ASTM A193 B8R / B8RA MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for ultra-high-strength, highly corrosion-resistant austenitic stainless steel fasteners (commonly known as Nitronic® 50) shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S142/26-XX and corresponding ASTM specifications.
- Complex Super-Alloy Chemistry: Detailed breakdowns verifying the advanced UNS S20910 chemistry. This grade combines Chromium, Nickel, Molybdenum, Manganese, Nitrogen, Columbium, and Vanadium. This matrix delivers superior corrosion resistance compared to standard 316 stainless and nearly double the yield strength.
- Solution Treatment Verification: Confirms the material is carbide solution treated. For B8RA (Class 1A), it specifically verifies the treatment occurred in the finished condition, ensuring optimum toughness and a stress-free microstructure.
- Elite Yield Strength Properties: Comprehensive reporting of Tensile Strength (Min 690 MPa), a massive Yield Strength requirement (Min 380 MPa—almost double standard B8 alloys), Elongation (Min 35%), and strictly controlled Hardness.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A193 Grade B8R & B8RA MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S142/26-XX
TC Date
04.11.20XX
Material Spec
ASTM A193 Grade B8RA Class 1A UNS S20910
Bar Shape / Size
Hex Bolt / M20
Dimensions / Item
Heavy Hex Bolt M20-2.5P x 100 mm
Quantity
80.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Mo | N | Cb | V | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.040 | 5.00 | 0.025 | 0.010 | 0.50 | 22.00 | 12.50 | 2.20 | 0.30 | 0.20 | 0.20 | Rem |
| Max: 0.06 | 4.00-6.00 | Max: 0.040 | Max: 0.030 | Max: 1.00 | 20.50-23.50 | 11.50-13.50 | 1.50-3.00 | 0.20-0.40 | 0.10-0.30 | 0.10-0.30 | Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRC) |
|---|---|---|---|
| 720.00 | 410.00 | 40.00 | 24, 25, 23 |
| Min: 690 | Min: 380 | Min: 35 | Max: 35 |
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 B8R / B8RA UNS S20910 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 B8RA)
- 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 B8R & B8RA MTC Certificate
What is UNS S20910 (commonly known as Nitronic 50)?
UNS S20910 (marketed as Nitronic® 50 or XM-19) is a highly alloyed austenitic stainless steel that provides a combination of corrosion resistance and strength not found in standard commercial materials. Its corrosion resistance is superior to that of type 316 and 316L, plus it has approximately twice the yield strength at room temperature.
Why are there so many elements in the B8R / B8RA chemistry?
This is a super-alloy formulation. Nitrogen and Manganese are heavily increased to supercharge the yield strength. Molybdenum is added for extreme resistance to pitting in marine environments. Finally, Columbium (Niobium) and Vanadium act as stabilizers to prevent intergranular corrosion, ensuring the bolt remains structurally sound even after welding or operating at high temperatures.
What is the difference between Grade B8R and B8RA?
Grade B8R (Class 1) is carbide solution treated before the final machining and threading processes. Grade B8RA (Class 1A) is carbide solution treated in the finished condition. Because this material is exceptionally strong, forming operations can induce significant residual stresses. Solution treating the completely formed bolt (B8RA) removes these stresses, guaranteeing maximum resistance to stress-corrosion cracking.