Table of Contents
- Alloy 20 Overview
- Technical Specifications
- Chemical Composition & Mechanical Properties
- Types of ASTM B473 UNS N08020 Square Bars
- Key Advantages of Alloy 20 Square Bar
- Key Applications of Alloy 20 Square Bar
- Quality Assurance & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Alloy 20 Overview
Aurum Overseas is a leading Alloy 20 Square Bars Supplier and ASTM B473 UNS N08020 Square Bars Supplier offering iron-nickel-chromium superalloy bars optimized for severe sulfuric acid environments. Formulated with 32–38% nickel and niobium stabilization, our ASTM B473 UNS N08020 Square Bars resist stress corrosion cracking and intergranular corrosion in aggressive chemical lines.
As a trusted Alloy 20 Square Bars Exporter and ASTM B473 UNS N08020 Square Bars Exporter, we supply precision UNS N08020 Bright Square Bars for CNC machining and heavy UNS N08020 Forged Square Bars for structural support. All orders include EN 10204 3.1 mill test certificates, heat traceability, and custom cut-to-length sizing.
We supply certified nickel alloy square bars to acid pickling plants, chemical synthesis facilities, synthetic fiber production units, and pharmaceutical equipment manufacturers across the USA, Germany, UK, UAE, Saudi Arabia, and global markets.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM B473, ASME SB473, EN 10088-3 |
| UNS Designation | UNS N08020 |
| Size Range (Square) | 6.0 mm x 6.0 mm to 200 mm x 200 mm (1/4" to 8" square profile) |
| Length Options | 1,000 mm to 6,000 mm, Custom Sawing Cut-to-Length |
| Surface Finishes | Cold Drawn, Centerless Ground, Bright Annealed, Hot Forged, Rough Turned |
| Condition | Solution Annealed (1010 °C to 1065 °C followed by rapid air cool or water quench) |
| Dimensional Tolerances | ASTM B473 / ISO 286-2 (h9, h10, h11 square profile tolerances) |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Standard | Werkstoff Nr. | UNS Designation | EN Symbol |
|---|---|---|---|
| ASTM B473 | 2.4660 | N08020 | NiCr20CuMo |
Chemical Composition (%)
| Element | Content Range (%) |
|---|---|
| Carbon (C) | 0.07 max |
| Manganese (Mn) | 2.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.035 max |
| Chromium (Cr) | 19.00 – 21.00 |
| Nickel (Ni) | 32.00 – 38.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
| Copper (Cu) | 3.00 – 4.00 |
| Niobium (Nb) / Columbium (Cb) | 8 x C min to 1.00 max |
| Iron (Fe) | 29.85 min* (Balance) |
Mechanical & Physical Properties
| Property Parameter | Metric Value | Imperial Value |
|---|---|---|
| Density | 8.1 g/cm³ | 0.292 lb/in³ |
| Melting Point | 1443 °C | 2430 °F |
| Tensile Strength (Min) | 551 MPa | 80,000 Psi |
| Yield Strength (0.2% Offset, Min) | 241 MPa | 35,000 Psi |
| Elongation (Min) | 30 % | 30 % |
Types of ASTM B473 UNS N08020 Square Bars
Aurum Overseas supplies Alloy 20 (UNS N08020) square bars in precision bright and heavy forged conditions for severe sulfuric acid environments.
UNS N08020 Bright Square Bars
UNS N08020 Forged Square Bars
Key Advantages of Alloy 20 Square Bar
Optimum Sulfuric Acid Protection
Maintains integrity across a broad spectrum of acid concentrations up to 150 °F (65 °C).
Minimized Grain Boundary Carbide Precipitation
Niobium stabilization enables direct welding without requiring post-weld solution annealing.
Resists Pitting and Crevice Corrosion
Molybdenum content (2.0–3.0%) protects structural profiles from localized chemical attack in chloride-bearing environments.
High Fabricability
Excellent cold forming and turning properties facilitate precision machining of valve components, shafts, and custom fittings.
Key Applications of Alloy 20 Square Bar
| Industry | Applications | Key Benefit |
|---|---|---|
| Chemical Processing | Agitator shafts, mixing blades, valve stems | Resists severe sulfuric acid degradation and process fluid corrosion. |
| Pickling Operations | Pickling hooks, rack supports, tie rods | Withstands aggressive acid bath vapors and elevated temperatures. |
| Synthetic Fiber Production | Processing equipment supports, pump shafts | Prevents equipment failure during polymer acid-catalyzed reactions. |
| Pharmaceutical Manufacturing | Reaction vessel structural framing | Eliminates metallic ion leaching into high-purity chemical batches. |
Quality Assurance & Inspection
As an established Alloy 20 Square Bars Exporter and ASTM B473 UNS N08020 Square Bars Exporter, every batch undergoes stringent verification before shipment:
- Chemical Verification: Optical Emission Spectroscopy (OES) and Positive Material Identification (PMI) to confirm strict alloy chemistry.
- Mechanical Testing: Tensile, yield, and elongation testing per ASTM B473 standards.
- Corrosion Resistance Testing: ASTM G28 testing to verify resistance to intergranular corrosion in high-alloy matrices.
Global Export Markets
As an established Alloy 20 Square Bars Exporter, Aurum Overseas supplies fully certified ASTM B473 UNS N08020 Square Bars to global chemical processing centers:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Alloy 20 contains 3.0–4.0% copper combined with 32–38% nickel and 2.0–3.0% molybdenum, creating a targeted metallurgical structure that resists sulfuric acid across various concentrations and elevated temperatures.
Niobium acts as a stabilizing element by binding with carbon, preventing chromium carbide precipitation at grain boundaries during welding or hot working.
Bright square bars are cold drawn or centerless ground for tight dimensional tolerances required in CNC machining, while forged square bars offer a dense, refined grain structure for heavy load-bearing structural frameworks.
Yes, due to niobium stabilization, Alloy 20 resists intergranular corrosion in the heat-affected zone, allowing components to be used in the as-welded condition.
Contact Aurum Overseas
Connect with a certified Alloy 20 Square Bars Supplier and ASTM B473 UNS N08020 Square Bars Supplier for prompt pricing, technical guidance, and export logistics support.