ASTM A194 GRADE 3 NUTS
ASTM A194 Grade 3 Nuts Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for 5% Chromium, 0.5% Molybdenum Alloy Steel Heavy Hex Nuts (ASTM A194 Grade 3). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A194 Gr 3 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for highly durable alloy steel nuts, engineered specifically with a 5% Chromium addition for improved oxidation and scaling resistance in elevated temperature pipeline environments.
- Full Traceability: Certified with TC No.: C199/26-XX and corresponding ASTM specifications.
- Material Chemistry: Explicitly details the crucial Chromium (4.00 - 6.00%) and Molybdenum (0.40 - 0.65%) additions which grant Grade 3 nuts superior high-temperature stability and mild corrosion resistance compared to standard carbon steel.
- Mechanical & Proof Load Testing: Comprehensive reporting of critical fastener metrics, validating the nut's Proof Load capability (min 1034 MPa / 150,000 psi) to resist thread stripping under immense operational stress.
- Heat Treatment Tracking: Verifies the necessary quenching and tempering (minimum 1050°F / 565°C) required to maximize the alloy's structural advantages and maintain targeted surface Hardness (24 to 35 HRC).
- 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 3 Data
Review the standard parameters and layout before downloading the full document.
TC Number
C199/26-XX
TC Date
28.06.20XX
Material Spec
ASTM A194 GRADE 3
Nut Shape / Size
Heavy Hex Nut / M24
Dimensions / Item
Heavy Hex Nut M24-3.0P
Quantity
450.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.15 | 0.60 | 0.020 | 0.015 | 0.50 | 5.10 | 0.55 |
| Min: 0.10 | Max: 1.00 | Max: 0.040 | Max: 0.030 | Max: 1.00 | Min: 4.00 Max: 6.00 |
Min: 0.40 Max: 0.65 |
Mechanical Properties
| PROOF LOAD STRESS (MPa) | HARDNESS (HRC) |
|---|---|
| 1080.50 | 27, 28, 26 |
| Min: 1034 | Min: 24 Max: 35 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for high-temperature pipeline and structural fasteners. The test reports confirm compliance with As Per ASME/ASTM A194 Grade 3 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 1050°F (565°C)
Testing Conditions
- Proof load & hardness testing carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — ASTM A194 Grade 3 MTC Certificate
What is ASTM A194 Grade 3?
Grade 3 is an intermediate alloy steel specification characterized primarily by a 5% Chromium and 0.5% Molybdenum addition. It is essentially an ASTM A182 F5 or AISI 501 equivalent material, commonly paired with ASTM A193 Grade B5 bolts for specialized pipeline and refinery applications.
Why use Grade 3 over carbon steel grades like Grade 2H or Grade 4?
The 5% Chromium content in Grade 3 provides significantly improved resistance to oxidation, scaling, and mild corrosion at elevated temperatures compared to standard or lower-alloy carbon steels (like 2H or 4). While it shares the same 150 ksi (1034 MPa) proof load requirement, its high-temperature durability is superior.
What heat treatment methodology is tracked on this certificate?
The MTC logs a Quench and Temper phase. ASTM A194 requires that Grade 3 nuts be reheated above their critical temperature, quenched in a liquid medium, and then tempered at a minimum temperature of 1050°F (565°C). This ensures a perfect balance of hardness (24-35 HRC) and ductility.