ASTM A194 GRADE 8N NUTS
ASTM A194 Grade 8N Nuts Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Nitrogen-Strengthened Austenitic Stainless Steel Heavy Hex Nuts (ASTM A194 Grade 8N). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A194 Gr 8N MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for highly corrosion-resistant austenitic stainless steel nuts enhanced with a precise nitrogen addition to boost structural performance.
- Full Traceability: Certified with TC No.: S304N/26-XX and corresponding ASTM specifications.
- Material Chemistry: Explicitly details the Chromium-Nickel chemistry of AISI Type 304N stainless steel, verifying the critical addition of Nitrogen (0.10% - 0.16%).
- Nitrogen Strengthening: By adding nitrogen in solid solution, Grade 8N achieves a significantly higher yield and tensile strength compared to standard Grade 8 (304 SS) without sacrificing its ductility or excellent corrosion resistance.
- Mechanical & Proof Load Testing: Comprehensive reporting of critical fastener metrics, validating the nut's Proof Load capability 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 optimized microstructure.
Live Preview: ASTM A194 Grade 8N Data
Review the standard parameters and layout before downloading the full document.
TC Number
S304N/26-XX
TC Date
12.09.20XX
Material Spec
ASTM A194 GRADE 8N (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 | N |
|---|---|---|---|---|---|---|---|
| 0.04 | 1.65 | 0.026 | 0.012 | 0.52 | 18.50 | 8.80 | 0.14 |
| 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 |
Min: 0.10 Max: 0.16 |
Mechanical Properties
| PROOF LOAD STRESS (MPa) | HARDNESS (HBW) |
|---|---|
| 620.50 | 175, 178, 172 |
| 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 8N 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 8N MTC Certificate
What does the "N" signify in Grade 8N?
The "N" stands for Nitrogen. By strategically alloying Type 304 stainless steel with 0.10% to 0.16% Nitrogen, metallurgists significantly increase the material's yield and tensile strength through solid solution strengthening, without reducing its ductility.
Does the nitrogen addition affect corrosion resistance?
Actually, it improves it. In addition to boosting mechanical strength, the dissolved nitrogen enhances the steel's resistance to localized corrosion, particularly pitting and crevice corrosion, making it slightly more robust in wet or chemical environments than standard Grade 8.
Why choose Grade 8N over standard Grade 8?
Engineers specify Grade 8N (Type 304N) for applications that demand higher design stresses or where weight reduction is a priority. It provides a higher strength-to-weight ratio while maintaining the classic oxidation and corrosion resistance of standard 18/8 stainless steel.