ASTM F593 ALLOY 20 (UNS N08020)
ASTM F593 Alloy 20 Sample MTC Certificate
Access a comprehensive, professionally formatted Material Test Certificate according to EN 10204-2004: 3.1 for ASTM F593 Alloy 20 (UNS N08020 / W.Nr. 2.4660). Inspect the exact documentation your QA and engineering teams will receive with every highly acid-resistant fastener order.
What's Inside This Alloy 20 MTC Certificate
This sample mill test certificate mirrors the rigorous QA documentation package standard for high-performance, sulfuric-acid resistant austenitic alloy orders shipped from our facilities.
- Full Traceability: Certified with TC No.: S74/26-XX and corresponding ASTM specifications.
- Superior Chemistry Verification: Detailed breakdowns verifying high Nickel (32.00–38.00%), Chromium (19.00–21.00%), Copper, and Molybdenum content, providing exceptional resistance to sulfuric acid and stress-corrosion cracking.
- Columbium Stabilization: Explicit verification of Columbium (Niobium) content (8xC to 1.00%), which minimizes carbide precipitation during welding and high-temperature exposure, thereby resisting intergranular corrosion.
- Mechanical Properties: Comprehensive reporting of Tensile Strength (650.00 MPa), Yield Strength (320.50 MPa), Elongation (35.50%), and Hardness (86, 85, 87 HRB) per ASTM requirements.
- Quality Compliance: 100% visual inspection carried out and verified free from defects and radioactive contamination.
Live Preview: ASTM F593 Alloy 20 MTC Data
Review the standard parameters and layout before downloading the full document.
TC Number
S74/26-XX
TC Date
14.08.20XX
Material Spec
ASTM F593 UNS N08020-2023
Bar Shape / Size
Hex Bar / 16 mm
Dimensions / Item
Hex Head Bolt M16-2P x 80 mm
Quantity
10.00 NOS
Chemical Composition %
| C | Mn | Si | Cr | Ni | Mo | Cu | Cb+Ta | Fe |
|---|---|---|---|---|---|---|---|---|
| 0.04 | 0.85 | 0.40 | 19.80 | 34.50 | 2.40 | 3.30 | 0.45 | Rem |
| Max: 0.07 | Max: 2.00 | Max: 1.00 | Min: 19.00 Max: 21.00 |
Min: 32.00 Max: 38.00 |
Min: 2.00 Max: 3.00 |
Min: 3.00 Max: 4.00 |
Min: 8xC Max: 1.00 |
Rem |
Mechanical Properties
| TENSILE STRENGTH (MPa) | YIELD STRENGTH 0.2% Offset (MPa) | % ELONGATION (GL-50mm) | HARDNESS (HRB) |
|---|---|---|---|
| 650.00 | 320.50 | 35.50 | 86, 85, 87 |
| Min: 550 | Min: 240 | Min: 30 | Max: 95 |
Standard References & Compliance
Our MTC certificates map to the demanding industrial standards for chemical processing fasteners. The test reports confirm compliance with As Per ASME/ASTM F593 UNS N08020 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
- Quenching Medium: Water quenched
Testing Conditions
- Chemical, Mechanical & hardness test carried at room temperature 25°C
- 100% visual inspection carried out
Technical FAQs — Alloy 20 (UNS N08020) MTC Certificate
Why are Copper and Molybdenum critical in the chemical makeup?
The addition of Copper (3.00-4.00%) and Molybdenum (2.00-3.00%) gives Alloy 20 its renowned resistance to general corrosion, pitting, and crevice corrosion. These elements specifically empower the alloy to withstand highly aggressive environments, most notably hot sulfuric acid.
What is the role of Columbium (Niobium) stabilization?
Alloy 20 is stabilized with Columbium (Cb) and Tantalum (Ta). You will see this verified on the MTC. This stabilization process effectively ties up carbon to prevent chromium carbide precipitation at the grain boundaries, which prevents embrittlement and makes the fasteners highly resistant to intergranular corrosion, even in the as-welded condition.
Is this material suitable for severe chloride environments?
Yes. The MTC logs a very high Nickel content (typically ~35%), which places Alloy 20 above standard austenitic stainless steels. This high nickel concentration provides exceptional resistance to chloride stress-corrosion cracking, making it a premium choice for chemical processing and petroleum refining.