Stainless Steel 347 & 347H Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for Stainless Steel Grades 347 and 347H (ASTM A276 / A479 UNS S34700 / S34709 / EN 1.4550). Inspect the exact documentation your QA and engineering teams will receive with every Ananka Fasteners order.
What's Inside This SS 347/347H MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for stabilized, highly heat-resistant austenitic stainless steel orders shipped from Ananka Fasteners Pvt Ltd.
- Full Traceability: Certified with TC No.: S122/26-XX and corresponding ASTM / EN specifications to ensure seamless part-tracking.
- Niobium (Columbium) Stabilization: Detailed breakdowns verifying the essential addition of Niobium + Tantalum. This critical alloying prevents the depletion of chromium (carbide precipitation) at grain boundaries, ensuring immunity to intergranular corrosion after welding or prolonged heating.
- Dual Certification Potential (347 / 347H): Explicit verification of carbon content. While standard 347 allows up to 0.08% max carbon, 347H restricts carbon to 0.04% - 0.10% to maximize high-temperature creep strength. Materials falling in the 0.04% - 0.08% range can be dual-certified.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (Min 515 MPa), Yield Strength (Min 205 MPa), Elongation (Min 40%), and Hardness (Max 92 HRB).
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: Stainless Steel 347 / 347H MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S122/26-XX
TC Date
10.05.20XX
Material Spec
ASTM A276 / A479 UNS S34700 / S34709
Bar Shape / Size
Round Bar / 20 mm
Dimensions / Item
Stud Bolt M20-2.5P x 120 mm
Quantity
250.00 NOS
Chemical Composition %
| C | Mn | P | S | Si | Cr | Ni | Nb (Cb) + Ta | Fe |
|---|---|---|---|---|---|---|---|---|
| 0.055 | 1.55 | 0.024 | 0.005 | 0.62 | 17.60 | 10.40 | 0.68 | Rem |
| Min: 0.04 Max: 0.08 |
Max: 2.00 | Max: 0.045 | Max: 0.030 | Max: 1.00 | Min: 17.00 Max: 19.00 |
Min: 9.00 Max: 13.00 |
Min: 10xC (347) Max: 1.00 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (Mpa) | YIELD STRENGTH 0.2% Offset (Mpa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 565.40 | 255.20 | 45.50 | 82, 83, 81 |
| Min: 515 | Min: 205 | Min: 40 | Max: 92 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for structural integrity in heavy welding and high-temperature environments. The test reports confirm compliance with As Per ASME/ASTM A276 / A479 UNS S34700 / S34709 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
- Solution Annealed
- Quenching Medium: Water quenched
Testing Conditions
- Chemical, Mechanical & hardness test carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — Stainless Steel 347 & 347H MTC Certificate
What is the main difference between 347 and 347H on the certificate?
The distinction lies in the carbon control. Standard Alloy 347 specifies a maximum carbon limit of 0.08%, utilizing Niobium (Columbium) to prevent sensitization during welding. Alloy 347H enforces a specific carbon range of 0.04% to 0.10%. This intentionally higher carbon ensures superior creep resistance and strength for structural components operating constantly above 538°C (1000°F).
Can a material be certified as both 347 and 347H?
Yes. As demonstrated in this sample MTC, if the heat's chemical composition yields a carbon content that falls perfectly within the overlapping range of both specs (i.e., between 0.04% and 0.08%) and satisfies the minimum Niobium ratio, the material can be "dual certified" to meet both UNS S34700 and S34709 requirements.
Why is Niobium (Cb) + Tantalum (Ta) added to this grade?
Niobium (historically referred to as Columbium in US specs) is a strong carbide former. By bonding with the carbon in the steel, it prevents the carbon from depleting the chromium at the grain boundaries when the metal is exposed to the sensitization temperature range (800°F - 1500°F). This stabilization makes 347/347H virtually immune to intergranular corrosion, making it perfect for heavy welded assemblies that cannot be annealed post-weld.