Alloy 20
Alloy 20
Apar Alloys offers Alloy 20, a highly corrosion-resistant nickel-iron-chromium austenitic alloy specifically designed for superior performance in sulfuric acid and highly corrosive chemical environments. With the addition of copper and molybdenum, Alloy 20 delivers excellent resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking. It is widely used in chemical, petrochemical, pharmaceutical, and food-processing industries where long-term durability and corrosion protection are essential.
Alloy 20 provides excellent mechanical properties, high fabricability, and outstanding resistance to acid attack, making it a preferred choice over conventional stainless steels in harsh service conditions. Apar Alloys is a trusted Supplier and Stockist of certified Alloy 20 materials, offering consistent quality and dependable performance across a wide range of industrial applications. With its stability at elevated temperatures and ability to withstand aggressive media, Alloy 20 is a reliable solution for corrosive-service components.
Specifications
| Grade | AISI | UNS | ASTM A276 / A479 | ASTM A182 | EN (W-Nr) | DIN Spec |
|---|---|---|---|---|---|---|
| Alloy 20 | — | N08020 | ASTM B463 / B473 | ASTM B462 | 2.4660 | Alloy 20 |
General Characteristics
Nickel-iron-chromium alloy with copper and molybdenum additions
Exceptional resistance to sulfuric acid and chloride environments
High resistance to pitting, crevice corrosion, and SCC
Excellent mechanical and thermal stability
Good weldability, formability, and fabrication properties
Ideal for chemical, petrochemical, pharmaceutical, and food-processing applications
Chemical Composition (nominal) %
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Alloy 20 | ≤0.07 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.035 | 19.0–21.0 | 32.0–38.0 | 2.0–3.0 | ≤0.10 | 3.0–4.0 | Balance |
Applications
Chemical processing equipment handling sulfuric and other strong acids
Petrochemical industry piping, storage vessels, and reactors
Food-processing and pharmaceutical manufacturing systems
Heat exchangers, condensers, and evaporators
Marine and corrosive industrial environments
Pumps, valves, flanges, fasteners, and piping components
Advantages
- Exceptional sulfuric acid resistance and acid durability
- Outstanding pitting, SCC, and crevice corrosion protection
- Excellent weldability and easy fabrication
- Strong mechanical properties at high temperatures
- Long-lasting performance with minimal maintenance
- Reliable solution for harsh, highly corrosive processing environments
Mechanical Properties (Typical at Room Temperature)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 620 – 760 |
| Yield Strength (MPa) | 300 – 350 |
| Elongation (%) | 30 – 40 |
| Hardness | 150 – 220 HB |
Why Choose Apar Alloys
Reliable Supplier & Stockist
Ready-to-dispatch inventory for various industrial requirements.
Global Sourcing Network
Materials sourced from reputed international mills for consistent quality.
Strict Quality Assurance
Every batch undergoes thorough inspection, testing, and certification.
Custom Sizes & Finishes
Tailor-made cuts, dimensions, and finishes to match project needs.
Competitive Pricing & Timely Delivery
Cost-effective solutions with assured on-time dispatch.
Technical Expertise & Support
Assistance from material selection to final application.
Get in Touch
Contact Us
Looking for reliable supply of Alloy 20? Contact Apar Alloys for specifications, customized options, and competitive pricing for Alloy 20 Bars, Plates, Sheets, Pipes & Components.
[Call] +91 98333 89128
301, 3rd floor, A WING, Krishvi Escape, Near Vinay Health Home, Fanaswadi Bhuleshwar, Mumbai - 400002.
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