ASTM A194 GRADE 8M NUTS
ASTM A194 Grade 8M 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 8M). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A194 Gr 8M MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for highly corrosion-resistant, austenitic stainless steel nuts. The "M" designation signifies a crucial Molybdenum addition, making these fasteners the premium choice for chemical processing, marine, and chloride-rich environments.
- Full Traceability: Certified with TC No.: S316/26-XX and corresponding ASTM specifications.
- Material Chemistry: Explicitly details the Chromium-Nickel-Molybdenum chemistry of AISI Type 316 stainless steel. The addition of 2-3% Molybdenum grants this grade its superior resistance to pitting and crevice corrosion compared to Grade 8.
- 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 a rapid water quench to lock in the alloy's corrosion-resistant microstructure.
- 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 8M Data
Review the standard parameters and layout before downloading the full document.
TC Number
S316/26-XX
TC Date
14.01.20XX
Material Spec
ASTM A194 GRADE 8M (CLASS 1)
Nut Shape / Size
Heavy Hex Nut / M24
Dimensions / Item
Heavy Hex Nut M24-3.0P
Quantity
300.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| 0.04 | 1.45 | 0.025 | 0.012 | 0.50 | 16.80 | 10.50 | 2.10 |
| Max: 0.08 | Max: 2.00 | Max: 0.045 | Max: 0.030 | Max: 1.00 | Min: 16.00 Max: 18.00 |
Min: 10.00 Max: 14.00 |
Min: 2.00 Max: 3.00 |
Mechanical Properties
| PROOF LOAD STRESS (MPa) | HARDNESS (HBW) |
|---|---|
| 575.40 | 168, 172, 165 |
| 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 8M 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 8M MTC Certificate
What is the base material for ASTM A194 Grade 8M?
Grade 8M is manufactured from AISI Type 316 Austenitic Stainless Steel. It contains 16-18% Chromium, 10-14% Nickel, and crucially, 2-3% Molybdenum. This composition offers significantly better general corrosion resistance compared to standard Type 304, particularly against chlorides and industrial solvents.
How does Grade 8M differ from Grade 8?
While Grade 8 is made from Type 304 stainless steel, Grade 8M is made from Type 316 stainless steel. The primary difference is the addition of Molybdenum in Grade 8M. This specific alloying element dramatically increases the steel's resistance to pitting and crevice corrosion in chloride-heavy environments (such as marine operations, offshore platforms, and de-icing salt exposure).
Why is "Carbide Solution Treatment" tracked on this certificate?
During high-temperature manufacturing, stainless steel can precipitate chromium carbides at the grain boundaries, which locally depletes chromium and lowers corrosion resistance. The MTC confirms that the nuts were reheated to at least 1900°F (1040°C) to dissolve these carbides fully back into the alloy solution, followed by a rapid water quench to lock the optimal microstructure in place.