ASTM A453 GRADE 660 (A286) – MTC
ASTM A453 Grade 660 (A286) Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM A453 Grade 660 (Alloy A286 / UNS S66286). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This A453 Grade 660 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for high-temperature, precipitation-hardening stainless steel fasteners shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S69/26-27 and corresponding ASTM specifications.
- High-Temperature Chemistry: Detailed breakdowns verifying the critical additions of Titanium (2.10%), Vanadium (0.30%), and Aluminum (0.20%) designed to maintain strength and oxidation resistance up to 1300°F (704°C).
- Heat Treatment Verification: Verified Solution Annealing Treatment followed by an Age Hardening (Precipitation) process as per ASTM A453 Class A/B requirements.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (950.50 MPa), Yield Strength (620.20 MPa), Elongation (22.50%), Hardness (29, 30, 28 HRC), and Stress Rupture testing compliance.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM A453 Grade 660 MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S69/26-27
TC Date
03.07.2026
Material Spec
ASTM A453 Gr 660 Class A UNS S66286
Bar Shape / Size
Round Bar / 16 mm
Dimensions / Item
Heavy Hex Bolt M16-2P x 80 mm
Quantity
10.00 NOS
Chemical Composition %
| C | Mn | Si | Cr | Ni | Mo | Ti | V | Al | B |
|---|---|---|---|---|---|---|---|---|---|
| 0.05 | 1.50 | 0.50 | 14.50 | 25.20 | 1.25 | 2.10 | 0.30 | 0.20 | 0.005 |
| Max: 0.08 | Max: 2.00 | Max: 1.00 | Min: 13.50 Max: 16.00 |
Min: 24.00 Max: 27.00 |
Min: 1.00 Max: 1.50 |
Min: 1.90 Max: 2.35 |
Min: 0.10 Max: 0.50 |
Max: 0.35 | Min: 0.001 Max: 0.010 |
Mechanical Properties (Class A)
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRC) | STRESS RUPTURE TEST |
|---|---|---|---|---|
| 950.50 | 620.20 | 22.50 | 29, 30, 28 | SATISFACTORY |
| Min: 895 | Min: 585 | Min: 15 | Min: 24 Max: 37 |
Min 100 hrs @ 1200°F |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for high-temperature fasteners. The test reports confirm compliance with As Per ASME/ASTM A453 Grade 660 UNS S66286 EDT. 2023 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 Perform. |
| Dimensional Accuracy | All Dimensions are as per PO Specification. |
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
- Solution Annealed @ 1650°F (899°C)
- Precipitation Hardened @ 1325°F (718°C)
Testing Conditions
- Chemical, Mechanical & hardness test carried at room temperature 25°C
- Stress Rupture Testing Verified
Technical FAQs — A453 Grade 660 MTC Certificate
Why are Titanium and Vanadium highlighted on this MTC?
ASTM A453 Grade 660 (A286 / UNS S66286) is an iron-base superalloy. The specific additions of Titanium (1.90 - 2.35%) and Vanadium (0.10 - 0.50%), as verified in the chemistry section, are crucial because they form the intermetallic precipitates during heat treatment that give the alloy its excellent high-temperature strength and oxidation resistance up to 1300°F (704°C).
What heat treatment methodology is tracked on this certificate?
The MTC logs a two-step process required for Class A/B material: an initial Solution Anneal (typically at 1650°F / 899°C) followed by a liquid quench, and a subsequent Precipitation Hardening (Aging) phase (typically at 1325°F / 718°C for 16 hours) followed by air cooling.
What is the Stress Rupture Test shown on the MTC?
Unlike standard stainless steels, Grade 660 fasteners are designed for high-temperature service. ASTM A453 requires a stress rupture test (typically testing the material under high stress at 1200°F for a minimum of 100 hours without failure) to guarantee the material will perform safely in high-heat turbine and exhaust environments.