Premium Alloy 20 Fasteners by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a leading manufacturer, exporter, and supplier of premium quality Alloy 20 Fasteners. Produced from high-performance nickel-iron-chromium alloy using advanced manufacturing processes, our Alloy 20 fasteners offer excellent corrosion resistance, durability, and long service life in challenging industrial environments. We supply Alloy 20 alloy fasteners in a wide range of sizes, specifications, and international standards to meet diverse project requirements.
Alloy 20 fasteners are highly regarded for their superior resistance to sulfuric acid, phosphoric acid, and chloride-induced corrosion. Alloy 20 provides excellent protection against pitting, crevice corrosion, and stress corrosion cracking, especially in chemical processing applications. These properties make Alloy 20 fasteners ideal for industries where reliability and corrosion resistance are critical.
With precise threading, smooth surface finish, and strict quality testing, our Alloy 20 fasteners ensure consistent performance in corrosive and high-pressure environments. They are widely used in chemical processing, pharmaceuticals, food processing, petrochemicals, and marine applications. For acid-resistant and cost-effective fastening solutions, Alloy 20 fasteners are a dependable and long-lasting choice.
Our Range of Alloy 20 (UNS N08020) Industrial Fasteners
- Alloy 20 (UNS N08020) Hex, Lock & Heavy Hex Nuts
- Nylon Insert, T-Nuts & Coupling Nuts available
- Manufactured as per ASTM B473 and DIN standards
- Excellent resistance to sulphuric acid environments
- ASTM B473 Alloy 20 Hex & Heavy Hex Bolts
- Carriage Bolts, Machine Bolts & Custom Designs
- UNS N08020 Nickel-Iron-Chromium Alloy
- Ideal for chemical and acid handling equipment
- Alloy 20 Socket Head, Button Head & Set Screws
- Manufactured to ASTM B473 / DIN 2.4660
- High resistance to pitting and crevice corrosion
- Used in reactors, pumps and chemical assemblies
- Alloy 20 Plain, Spring Lock & Dock Washers
- Split & Ogee Washers as per DIN specifications
- Prevents galvanic corrosion in aggressive media
- Suitable for chemical and fertilizer plants
- ASTM B473 Alloy 20 Stud Bolts
- Single Ended, Double Ended & Fully Threaded Studs
- UNS N08020 for corrosion-resistant flanges
- Used in acid pipelines and pressure vessels
- Alloy 20 Fully Threaded & Cut-to-Length Rods
- ASTM B473 / UNS N08020 Compliance
- Excellent durability in acidic environments
- Commonly used in chemical & fertilizer plants
ALLOY 20 ASTM B473 FASTENERS EQUIVALENT GRADES
| Standard | Werkstoff Nr. | UNS | AFNOR | EN |
|---|---|---|---|---|
| Alloy 20 | 2.4660 | N08020 | Z2NCUD31-20AZ | NiCr20CuMo |
SPECIFICATION OF ALLOY 20 FASTENERS
| Standard | ASTM B473, B564 / ASME SB473, SB564 |
|---|---|
| Dimension Standards | DIN, ISO, ASTM, JIS, BS, GB, IS & International |
| Size Range | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Length | 3 mm to 200 mm |
| Types | Nuts, Bolts, Screws, Studs, Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws, Hex Nuts, Lock Nuts, Washers, Spring Washers, Threaded Rods, U-Bolts, Anchor Bolts, Eye Bolts, Foundation Bolts, Structural Fasteners |
CHEMICAL COMPOSITION OF ALLOY 20 INDUSTRIAL FASTENERS
| Grade | Ni | C | Mn | P | S | Si | Cr | Nb | Mo | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| Alloy 20 | 32 – 38 | 0.02 max | 1 – 2 | 0.02 max | 0.005 max | 0.7 max | 19 – 21 | 0.1 – 0.3 | 2 – 3 | 3 – 4 |
MECHANICAL PROPERTIES OF ASME SB473 ALLOY 20 BOLTS & NUTS
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|---|
| Alloy 20 | 8.1 g/cm³ | 1443°C (2430°F) | 80,000 psi (551 MPa) | 35,000 psi (241 MPa) | 30% |
💡 Practical Difference in Use
Use Alloy 20 Fasteners when: superior resistance to sulfuric acid, phosphoric acid, and chloride-containing environments is required in chemical and process industries. → Example: chemical processing plants, acid handling systems, pharmaceutical equipment, and food processing units.
Applications of Alloy 20 Fasteners
Alloy 20 fasteners (UNS N08020) are designed to provide excellent resistance to acid attack, pitting, and stress corrosion cracking. Alloy 20 performs exceptionally well in sulfuric acid service and mixed chemical environments, making it a preferred material for corrosion-resistant fastening. These fasteners are ideal for critical applications requiring durability and chemical reliability.
- Chemical Processing: Reactors, tanks, and piping systems.
- Pharmaceuticals: Clean and corrosion-resistant equipment.
- Food Processing: Acidic and hygienic processing lines.
When to Choose Alloy 20 Fasteners?
Alloy 20 alloy fasteners are selected for applications requiring strong acid resistance and dependable corrosion protection.
Choose Alloy 20 Fasteners when:
- Exposure to sulfuric or phosphoric acid exists
- Protection against pitting and SCC is needed
- Chemical processing environments are aggressive
- Long-term corrosion resistance is critical
- Reliable performance in acidic media is essential
Industries That Use Alloy 20 Fasteners
Alloy 20 fasteners are widely used in industries requiring acid-resistant and corrosion-resistant fastening solutions.
Engineered for acid resistance.
Uses
Reactors, piping, and storage tanks.
Why Alloy 20?
Excellent resistance to sulfuric acid corrosion.
Safe for clean environments.
Uses
Processing and handling equipment.
Why Alloy 20?
Corrosion resistance with hygiene compatibility.
Suitable for acidic media.
Uses
Processing lines and vessels.
Why Alloy 20?
Reliable performance in acidic food environments.
Usage Guide for Alloy 20 Fasteners
Alloy 20 nuts offer excellent resistance to sulfuric acid, chlorides, and chemical corrosion in demanding environments.
Choose Alloy 20 Nuts when
- Used in sulfuric or phosphoric acid service
- Protection from pitting and stress corrosion cracking is required
- Exposure to aggressive chemicals exists
- Long service life in acid environments is expected
Alloy 20 bolts provide reliable fastening in chemical processing and acid-handling systems.
Choose Alloy 20 Bolts when
- Used in chemical plants and fertilizer units
- Exposure to acidic chemicals occurs
- Strong corrosion resistance is required
- Durable fastening in harsh media is needed
Alloy 20 screws ensure secure fastening in chemically aggressive environments.
Choose Alloy 20 Screws when
- Used in chemical reactors and tanks
- Continuous acid exposure exists
- High corrosion resistance is needed
- Reliable performance in chemical service is required
Alloy 20 washers provide load distribution with strong acid corrosion resistance.
Choose Alloy 20 Washers when
- Used in chemical piping flanges
- Acidic or chloride exposure exists
- Protection from galvanic corrosion is needed
- Joint durability is critical
Alloy 20 stud bolts perform well in acid processing and pressure systems.
Choose Alloy 20 Stud Bolts when
- Used in acid storage or processing units
- Severe chemical exposure exists
- High joint reliability is required
- Long-term corrosion resistance is needed
Alloy 20 threaded rods provide versatile fastening in acid and chemical plants.
Choose Alloy 20 Threaded Rods when
- Custom-length fastening in chemical plants is required
- Used in acidic processing lines
- Resistance to sulfuric acid is necessary
- Premium corrosion-resistant fasteners are preferred
Our Industrial Fasteners are manufactured using precision forging and machining processes to ensure excellent dimensional accuracy, strength, and long-term performance. Each fastener undergoes strict quality inspections, including visual and dimensional checks, tensile testing, hardness testing, and thread gauging to verify compliance with specified tolerances.
Comprehensive chemical composition analysis and mechanical property testing are carried out to confirm material integrity and standard conformity. Where required, additional NDT methods such as ultrasonic testing, magnetic particle inspection (MPI), or dye penetrant testing (DPT) are performed to detect surface or internal defects. Controlled forging, heat treatment, and threading processes eliminate issues such as cracks, laps, and thread imperfections.
All fasteners are manufactured and tested in accordance with international standards including ASTM, ASME, ISO, DIN, BS, and IS specifications. Engineered for reliable performance in high-pressure, high-temperature, and corrosive environments, our fasteners are widely used across oil & gas, petrochemical, power generation, construction, and heavy engineering industries.
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