ASTM A194 GRADE 2 & 2M NUTS
ASTM A194 Grade 2 & 2M Nuts Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Carbon Steel Heavy Hex Nuts (ASTM A194 Grade 2 and Grade 2M). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A194 Gr 2/2M MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for moderate-to-high temperature carbon steel nuts, particularly tracking the strict hardness limits required for Grade 2M sour service environments.
- Full Traceability: Certified with TC No.: C99/26-XX and corresponding ASTM specifications.
- Material Chemistry: Detailed carbon steel breakdowns verifying the minimum Carbon limit (0.40% min) required to provide the structural backbone for these heavy hex nuts.
- Mechanical & Proof Load Testing: Comprehensive reporting of critical fastener metrics, validating the nut's Proof Load capability. Grade 2 mandates a minimum of 1034 MPa, while Grade 2M accommodates 827 MPa to balance lower hardness limits.
- Strict Hardness Verification: Explicit tracking of Brinell Hardness emphasizing the critical 235 HBW (22 HRC) maximum required for Grade 2M to ensure resistance to Sulfide Stress Cracking (SSC) in H2S environments.
- Quality Compliance: 100% visual and dimensional inspection carried out to guarantee perfectly formed threads and flat bearing surfaces in accordance with ASME standards.
Live Preview: ASTM A194 Grade 2 & 2M Data
Review the standard parameters and layout before downloading the full document.
TC Number
C99/26-XX
TC Date
18.09.20XX
Material Spec
ASTM A194 GRADE 2 / 2M
Nut Shape / Size
Heavy Hex Nut / M24
Dimensions / Item
Heavy Hex Nut M24-3.0P
Quantity
400.00 NOS
Chemical Composition %
| C | Mn | P | S | Si |
|---|---|---|---|---|
| 0.45 | 0.72 | 0.021 | 0.018 | 0.22 |
| Min: 0.40 | Max: 1.00 | Max: 0.040 | Max: 0.050 | Max: 0.40 |
Mechanical Properties
| PROOF LOAD STRESS (MPa) | HARDNESS (HBW) |
|---|---|
| 1055.20 | 212, 215, 210 |
| Min (Gr 2): 1034 Min (Gr 2M): 827 |
Min: 159 Max (Gr 2M): 235 / Max (Gr 2): 352 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for pipeline and structural fasteners. The test reports confirm compliance with As Per ASME/ASTM A194 Grade 2 and Grade 2M with respect to the tests carried out, specifically noting sour service limits where 2M is designated.
| Standard / Requirement | Confirmation on Certificate |
|---|---|
| Visual Inspection | 100% visual inspection carried out & found free from defects. |
| Sour Service (Grade 2M) | Hardness verified max 22 HRC (235 HBW) complying with NACE MR0175 / ISO 15156. |
| Safety Requirements | Material is free from radioactive contamination. |
| 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
- NACE MR0175 Conformity (for 2M)
- Certified ISO 9001: 2015 Company
Manufacturing Process
- Hot Forged / Cold Punched
- Stress Relieved / Tempered (to control hardness for 2M)
Testing Conditions
- Proof load & hardness testing carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — ASTM A194 Grade 2 & 2M MTC Certificate
What is the difference between Grade 2 and Grade 2M on this certificate?
Both grades share the same chemical composition (0.40% min Carbon), but Grade 2M has a strictly controlled maximum hardness limit of 235 HBW (22 HRC). Grade 2 allows a higher maximum hardness (up to 352 HBW). Due to its lower hardness, Grade 2M also has a correspondingly lower minimum proof load requirement.
Why is the hardness strictly limited for Grade 2M?
The "M" in 2M indicates modification for sour service environments containing Hydrogen Sulfide (H2S), typical in the oil and gas industry. Keeping the hardness below 22 HRC complies with NACE MR0175 and prevents catastrophic Sulfide Stress Cracking (SSC).
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.