GRADE 431 STAINLESS STEEL (UNS S43100 / EN 1.4057) – MTC
Grade 431 Stainless Steel Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Grade 431 Stainless Steel (ASTM A276 UNS S43100 / EN 1.4057). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This SS 431 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for high-strength, hardenable martensitic stainless steel orders shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S132/26-XX and corresponding ASTM / EN specifications to ensure seamless part-tracking.
- Martensitic Chemistry Profile: Detailed breakdowns verifying the Chromium (15.00% - 17.00%) and Nickel (1.25% - 2.50%) content. The addition of Nickel makes 431 the most corrosion-resistant of all martensitic stainless grades.
- Heat Treated for High Strength: Explicit verification of the material's condition (typically Hardened and Tempered). This process unlocks the exceptional tensile strength and toughness characteristic of this grade.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (typically >850 MPa for Condition T), Yield Strength (Min 650 MPa), Elongation (Min 15%), and Hardness (e.g., 248 - 302 HB).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: Grade 431 Stainless Steel MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S132/26-XX
TC Date
28.08.20XX
Material Spec
ASTM A276 UNS S43100 / EN 1.4057 (Condition T)
Bar Shape / Size
Round Bar / 30 mm
Dimensions / Item
Hex Head Bolt M30-3.5P x 120 mm
Quantity
100.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Fe |
|---|---|---|---|---|---|---|---|
| 0.16 | 0.65 | 0.022 | 0.005 | 0.45 | 16.20 | 1.80 | Rem |
| Max: 0.20 | Max: 1.00 | Max: 0.040 | Max: 0.030 | Max: 1.00 | Min: 15.00 Max: 17.00 |
Min: 1.25 Max: 2.50 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HB) |
|---|---|---|---|
| 925.50 | 755.20 | 18.50 | 282, 285, 280 |
| Min: 850 | Min: 650 | Min: 15 | Min: 248 Max: 302 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for high-tensile, corrosion-resistant hardware. The test reports confirm compliance with As Per ASME/ASTM A276 UNS S43100 / EN 1.4057 EDT. 20XX 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
- Hardened at 980-1065°C
- Quenching Medium: Oil / Air quenched
- Tempered to required mechanical condition
Testing Conditions
- Chemical, Mechanical & hardness test carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — Grade 431 Stainless Steel MTC Certificate
Why choose martensitic Grade 431 over austenitic grades like 304 or 316?
The primary advantage of Grade 431 is its high mechanical strength and hardness, which can be tailored through heat treatment (hardening and tempering). While austenitic grades (304/316) offer excellent corrosion resistance, they cannot be hardened by heat treatment. Grade 431 bridges this gap, offering the highest corrosion resistance among the martensitic 400-series combined with outstanding tensile strength and toughness.
What is the significance of Nickel in the 431 chemical composition?
Unlike standard martensitic grades like 410 or 420, Grade 431 includes a specified Nickel addition of 1.25% to 2.50%. As verified in the MTC's chemistry table, this nickel significantly enhances the alloy's toughness and substantially improves its corrosion resistance, especially in marine and industrial environments.
What typical applications require fasteners certified to Grade 431?
Because of its unique combination of high tensile strength, good toughness, and excellent martensitic corrosion resistance, Grade 431 is highly sought after for demanding structural applications. Common uses include marine hardware, pump and valve shafts, aircraft components, heavily stressed structural fasteners, and offshore rigging equipment.