ASTM A194 GRADE 16 NUTS
ASTM A194 Grade 16 Nuts Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Chromium-Molybdenum-Vanadium Alloy Steel Heavy Hex Nuts (ASTM A194 Grade 16). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A194 Gr 16 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for advanced alloy steel nuts engineered for prolonged high-pressure and elevated-temperature service, commonly paired with A193 B16 bolts.
- Full Traceability: Certified with TC No.: C178/26-XX and corresponding ASTM specifications.
- Material Chemistry: Explicitly details the Chromium-Molybdenum-Vanadium (Cr-Mo-V) alloy foundation. The addition of Vanadium provides superior creep resistance and maintains structural stability at temperatures exceeding those suited for Grade 7 or 2H.
- Mechanical & Proof Load Testing: Comprehensive reporting of critical fastener metrics, validating the nut's Proof Load capability (min 1034 MPa / 150,000 psi) to ensure it resists thread stripping under extreme thermal and mechanical stress.
- Heat Treatment Tracking: Verifies the necessary quenching and high-temperature tempering (minimum 1200°F / 650°C) required to maximize the alloy's structural advantages and maintain surface Hardness (24 to 35 HRC).
- Quality Compliance: 100% visual and dimensional inspection carried out to guarantee perfectly formed threads and flat bearing surfaces.
Live Preview: ASTM A194 Grade 16 Data
Review the standard parameters and layout before downloading the full document.
TC Number
C178/26-XX
TC Date
15.10.20XX
Material Spec
ASTM A194 GRADE 16
Nut Shape / Size
Heavy Hex Nut / M24
Dimensions / Item
Heavy Hex Nut M24-3.0P
Quantity
200.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Mo | V |
|---|---|---|---|---|---|---|---|
| 0.42 | 0.58 | 0.015 | 0.010 | 0.25 | 0.95 | 0.58 | 0.30 |
| Min: 0.36 Max: 0.47 |
Min: 0.45 Max: 0.70 |
Max: 0.035 | Max: 0.040 | Min: 0.15 Max: 0.35 |
Min: 0.80 Max: 1.15 |
Min: 0.50 Max: 0.65 |
Min: 0.25 Max: 0.35 |
Mechanical Properties
| PROOF LOAD STRESS (MPa) | HARDNESS (HRC) |
|---|---|
| 1085.00 | 29, 30, 28 |
| Min: 1034 | Min: 24 Max: 35 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for extreme high-temperature pipeline and power generation fasteners. The test reports confirm compliance with As Per ASME/ASTM A194 Grade 16 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
- Quenched & Tempered
- Tempering Temperature: Min 1200°F (650°C)
Testing Conditions
- Proof load & hardness testing carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — ASTM A194 Grade 16 MTC Certificate
Why is Vanadium added to Grade 16?
Grade 16 is a Chromium-Molybdenum-Vanadium alloy. The addition of Vanadium (0.25 - 0.35%) significantly enhances the steel's microstructural stability and creep resistance at elevated temperatures. This makes Grade 16 nuts suitable for extreme thermal environments where standard Grade 7 or Grade 4 nuts might gradually deform over time under load.
What heat treatment methodology is tracked on this certificate?
The MTC logs a Quench and Temper phase. ASTM A194 requires that Grade 16 nuts be reheated above their critical temperature, quenched in a liquid medium, and then tempered at a very high minimum temperature of 1200°F (650°C). This high tempering requirement ensures the material will not soften or lose its mechanical properties when exposed to high operational temperatures in power plants or refineries.
Why does the certificate highlight Proof Load rather than Tensile Strength?
Nuts are internally threaded fasteners, meaning their primary failure mode is thread stripping rather than breaking like a bolt. Therefore, standard compliance focuses on Proof Load Stress—the specific axial load the nut can support without experiencing permanent thread deformation. For Grade 16 heavy hex nuts, this is rigorously tested and logged at 150,000 psi (1034 MPa).