ASTM A194 GRADE 6 (AISI 410)
ASTM A194 Grade 6 Nuts Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Martensitic Stainless Steel Fasteners (ASTM A194 Grade 6 / AISI 410). Review the verified chemistry, mechanical specifications, and tempering criteria necessary for reliable service in corrosive, high-pressure environments.
What's Inside This A194 Grade 6 MTC Certificate
This sample mill test certificate mirrors the strict QA documentation package standard for AISI 410 martensitic stainless steel heavy hex nuts shipped from our facility for high-temperature and scaling resistance service.
- Full Traceability: Certified with TC No.: S43/26-XX along with precise production heat identifiers.
- Martensitic Stainless Chemistry: Detailed analysis validating the standard Chromium range (11.50-13.50%) coupled with a controlled Carbon profile (0.15% max), ensuring excellent hardening response and corrosion resistance.
- Quenched & Tempered Microstructure: Documented thermal tracking confirming a robust hardening phase followed by strict tempering to prevent stress corrosion cracking.
- Verified Hardness Ranges: Reports verified Brinell hardness testing properties ranging between 248 to 352 HBW (Rockwell 24 to 38 HRC) to safely support rated proof load limits under severe joint stresses.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A194 Grade 6 MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S43/26-XX
TC Date
23.06.20XX
Material Spec
ASTM A194 Grade 6 (AISI 410)
Nut Profile / Size
Heavy Hex Nut / M16
Dimensions / Item
Heavy Hex Nut M16 x 2.0P
Quantity
1200.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Fe |
|---|---|---|---|---|---|---|
| 0.12 | 0.65 | 0.022 | 0.015 | 0.42 | 12.30 | Rem |
| Max: 0.15 | Max: 1.00 | Max: 0.040 | Max: 0.030 | Max: 1.00 | Min: 11.50 Max: 13.50 |
Rem |
Mechanical & Hardness Properties
| BRINELL HARDNESS (HBW) | ROCKWELL HARDNESS (HRC) | PROOF LOAD STRESS (MPa) |
|---|---|---|
| 272 | 28 | 1105 |
| Min: 248 Max: 352 |
Min: 24 Max: 38 |
Min: 1100 (Heavy Hex) |
Standard References & Compliance
Our quality systems confirm perfect correlation with international manufacturing boundaries. Visual structural evaluation passes with zero surface cracks or thread variations detected.
| Standard / Requirement | Confirmation on Certificate |
|---|---|
| Visual Inspection | 100% visual inspection carried out & found free from defects. |
| Safety Requirements | Material is certified free from radioactive contamination. |
| Weld Repairs | No weld repairs performed on finished stainless elements. |
| Dimensional Accuracy | All heavy hex dimensions verified strictly against standard ASME B18.2.2 requirements. |
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
- Liquid Quenched above 815°C (1500°F)
- Tempered at a minimum of 593°C (1100°F)
Testing Conditions
- Hardness and dimensional checks logged at 25°C
- 100% thread path conformance verified
Technical FAQs — ASTM A194 Grade 6 MTC Certificate
Why is AISI 410 stainless steel selected for ASTM A194 Grade 6 nuts?
AISI 410 is a martensitic stainless steel that allows the fastener to achieve high mechanical strength and hardness through thermal quenching and tempering. The ~12% Chromium content provides good atmospheric and environmental corrosion resistance, as well as scale resistance up to 649°C (1200°F), making it perfect for steam valves, refineries, and chemical plant infrastructure.
What is the significance of the minimum tempering temperature for Grade 6?
ASTM A194 requires Grade 6 nuts to be tempered at a minimum temperature of 593°C (1100°F). This step relieves internal stresses caused by the quenching process, optimizes the material's structural ductility, and enhances resistance against stress corrosion cracking (SCC) while maintaining a strict hardness window.
What are the permissible hardness limits for Grade 6 nuts on a certified MTC?
To comply with ASTM A194 Grade 6 parameters, nuts must show a Brinell hardness value between 248 and 352 HBW, which converts to approximately 24 to 38 HRC on the Rockwell scale. This ensuring the threads possess sufficient yield capacity to resist stripping without becoming overly brittle under heavy preload parameters.