ASTM A194 GRADE 8 NUTS
ASTM A194 Grade 8 Nuts Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Austenitic Stainless Steel Heavy Hex Nuts (ASTM A194 Grade 8). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A194 Gr 8 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for highly corrosion-resistant, austenitic stainless steel nuts widely used in chemical processing, marine, and extreme low-temperature (cryogenic) environments.
- Full Traceability: Certified with TC No.: S304/26-XX and corresponding ASTM specifications.
- Material Chemistry: Explicitly details the Chromium-Nickel (18/8) chemistry of AISI Type 304 stainless steel, which grants this grade its excellent resistance to general oxidation and localized corrosion.
- Mechanical & Proof Load Testing: Comprehensive reporting of critical fastener metrics, validating the nut's Proof Load capability (typically min 550 MPa for standard Class 1) to ensure structural integrity in high-stress applications.
- Heat Treatment Tracking: Verifies the essential Carbide Solution Treatment (Solution Annealing) at a minimum of 1900°F (1040°C) followed by rapid water quenching to prevent intergranular corrosion.
- Quality Compliance: 100% visual and dimensional inspection carried out to guarantee perfectly formed threads and flat bearing surfaces in accordance with ASME B18.2.2.
Live Preview: ASTM A194 Grade 8 Data
Review the standard parameters and layout before downloading the full document.
TC Number
S304/26-XX
TC Date
24.11.20XX
Material Spec
ASTM A194 GRADE 8 (CLASS 1)
Nut Shape / Size
Heavy Hex Nut / M20
Dimensions / Item
Heavy Hex Nut M20-2.5P
Quantity
350.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni |
|---|---|---|---|---|---|---|
| 0.05 | 1.52 | 0.028 | 0.012 | 0.45 | 18.60 | 8.50 |
| Max: 0.08 | Max: 2.00 | Max: 0.045 | Max: 0.030 | Max: 1.00 | Min: 18.00 Max: 20.00 |
Min: 8.00 Max: 10.50 |
Mechanical Properties
| PROOF LOAD STRESS (MPa) | HARDNESS (HBW) |
|---|---|
| 585.50 | 165, 168, 162 |
| Min: 550 | Min: 126 Max: 321 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for high-temperature and highly corrosive pipeline fasteners. The test reports confirm compliance with As Per ASME/ASTM A194 Grade 8 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 performed. |
| Dimensional Accuracy | All dimensions, threads, and bearing surface tolerances conform to ASME B18.2.2. |
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 (Annealed)
- Treatment Temp: Min 1900°F (1040°C)
- Quenching: Rapid Water Quench
Testing Conditions
- Proof load & hardness testing carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — ASTM A194 Grade 8 MTC Certificate
What is the base material for ASTM A194 Grade 8?
Grade 8 is manufactured from AISI Type 304 Austenitic Stainless Steel. It contains approximately 18% Chromium and 8% Nickel. This specific chemistry provides excellent resistance to oxidation and corrosion, making it a standard choice for chemical processing and marine environments, as well as cryogenic (extremely low temperature) applications.
Why is "Carbide Solution Treatment" tracked on this certificate?
During manufacturing, stainless steel can precipitate chromium carbides at the grain boundaries, which lowers its corrosion resistance. The MTC confirms that the nuts were heated to at least 1900°F (1040°C) to dissolve these carbides back into the alloy solution, followed by a rapid water quench to lock them in place, ensuring maximum corrosion resistance.
How does Grade 8 differ from Grade 8M?
While Grade 8 is made from Type 304 stainless steel, Grade 8M is made from Type 316 stainless steel. The main difference is that Grade 8M contains the addition of Molybdenum (typically 2-3%), which gives it far superior resistance to pitting and crevice corrosion in chloride-heavy environments (like seawater or de-icing salts).