Alloy 20 Bolts Supplier & Exporter
Aurum Overseas is a trusted global manufacturer and supplier of premium quality Alloy 20 Bolts manufactured for industrial applications requiring exceptional corrosion resistance, chemical stability, and long-term mechanical reliability in aggressive process environments. These high-performance bolting solutions are widely used across chemical processing plants, sulfuric acid handling systems, pharmaceutical manufacturing, food processing equipment, marine engineering systems, offshore platforms, and industrial piping assemblies where conventional stainless steel fasteners often fail due to severe corrosion exposure.
Alloy 20, also commonly known as Carpenter 20 or UNS N08020, is a nickel-iron-chromium alloy specifically developed to provide excellent resistance against sulfuric acid corrosion, chloride stress corrosion cracking, pitting corrosion, crevice corrosion, and highly aggressive chemical processing conditions. The addition of copper and molybdenum significantly improves its corrosion resistance compared to standard stainless steel grades, making Alloy 20 bolts a preferred fastening solution in highly acidic industrial environments.
As a reliable exporter, Aurum Overseas supplies certified Alloy 20 Fasteners manufactured according to ASTM, ASME, DIN, ISO, and international engineering standards for industrial projects worldwide.
What are Alloy 20 Bolts?
Alloy 20 Bolts are high nickel corrosion resistant industrial fasteners manufactured from a specialized austenitic alloy designed to perform reliably in chemically aggressive environments. Unlike standard stainless steel fasteners, Alloy 20 provides excellent resistance against sulfuric acid attack, chloride corrosion, phosphoric acid environments, nitric acid exposure, and corrosive process chemicals commonly found in chemical manufacturing industries.
The alloy was originally developed specifically for sulfuric acid applications where traditional stainless steel materials suffered rapid degradation. Because of its superior corrosion resistance properties, industrial engineers widely specify Alloy 20 fastening systems for critical process equipment where long service life and material stability are essential.
Due to its unique composition and corrosion performance, Alloy 20 is extensively used in environments where corrosion failure directly affects operational safety, process efficiency, and equipment longevity.
Specifications of Alloy 20 Bolts
| Specification | Details |
|---|---|
| Product | Alloy 20 Bolts |
| Material Grade | Alloy 20 / Carpenter 20 |
| UNS Number | UNS N08020 |
| DIN Grade | DIN 2.4660 |
| ASTM Standard | ASTM B472 |
| ASME Standard | ASME SB472 |
| Additional Standard | ASTM F467 / ASTM F468 |
| International Standards | DIN, ISO, JIS, ASTM, BS, IS |
| Size | M3 – M56 |
| Length | 3 mm – 200 mm |
| Machine Screw Size | M1.6 – M12 |
| Certification | EN 10204 3.1 |
| Manufacturing Process | Hot Forged, Cold Forged, CNC Machined |
Mechanical Properties of Alloy 20 Bolts
Alloy 20 offers excellent mechanical strength while maintaining superior corrosion resistance under aggressive chemical exposure.
| Property | Alloy 20 |
|---|---|
| Tensile Strength | 620 MPa |
| Yield Strength | 300 MPa |
| Elongation | 35% |
| Hardness | 217 HB Max |
| Density | 8.08 g/cm³ |
| Melting Point | 1370°C |
| Temperature Resistance | Excellent |
| Corrosion Resistance | Extremely High |
These mechanical properties allow Alloy 20 bolts to perform reliably in demanding chemical processing applications where structural integrity and corrosion resistance are equally critical.
Chemical Composition of Alloy 20 (UNS N08020) Bolts
The excellent corrosion resistance of Alloy 20 comes from its carefully balanced nickel, chromium, copper, and molybdenum composition.
| Element | Composition |
|---|---|
| Nickel | 32 – 38% |
| Chromium | 19 – 21% |
| Iron | Balance |
| Copper | 3 – 4% |
| Molybdenum | 2 – 3% |
| Manganese | 2% Max |
| Silicon | 1% Max |
| Carbon | 0.07% Max |
| Phosphorus | 0.045% Max |
| Sulfur | 0.035% Max |
This composition gives the alloy superior resistance to acidic corrosion and stress corrosion cracking.
Equivalent Grades of Alloy 20 Bolts
Industrial buyers often reference multiple material designations depending on regional engineering standards and procurement specifications.
| Standard | Equivalent Grade |
|---|---|
| UNS | N08020 |
| ASTM | Alloy 20 |
| DIN | 2.4660 |
| Werkstoff | 2.4660 |
| Trade Name | Carpenter 20 |
| EN | NiCr20CuMo |
Types of Alloy 20 Bolts Available
Different industrial assemblies require specialized fastening configurations depending on design requirements and installation conditions.
| Bolt Type | Applications |
|---|---|
| Hex Bolts | Industrial piping systems |
| Stud Bolts | Pressure vessel assemblies |
| Hex Head Bolts | Chemical processing equipment |
| U Bolts | Pipe support systems |
| Eye Bolts | Mechanical lifting systems |
| Allen Bolts | Precision engineering assemblies |
| J Bolts | Foundation structures |
| Lag Bolts | Heavy industrial mounting |
| Countersunk Bolts | Flush surface installations |
| Machine Screws | Equipment fastening |
Thread Options
| Thread Type | Availability |
|---|---|
| UNF Threads | Available |
| BSW Threads | Available |
| CBSF Threads | Available |
| UN Threads | Available |
| Metric Threads | Available |
| Custom Thread Configurations | Available |
Why Alloy 20 Bolts Are Used for Chemical Processing Applications
One of the biggest advantages of Alloy 20 Bolts is their ability to resist sulfuric acid attack better than most stainless steel grades and conventional nickel alloys. Industries dealing with acidic process media require fastening materials capable of maintaining long-term corrosion resistance without mechanical degradation or premature failure.
The alloy performs exceptionally well in phosphoric acid systems, nitric acid environments, chloride contaminated process streams, chemical reactors, pharmaceutical processing systems, and aggressive fluid transfer systems. This makes Alloy 20 a preferred choice for industries where chemical compatibility directly impacts production reliability and operational safety.
Because of this corrosion resistance, industrial engineers frequently specify Alloy 20 bolts in environments where standard stainless steel materials may fail due to aggressive chemical exposure.
Why Alloy 20 Bolts Are Used in Acidic & Chemical Processing Applications
Alloy 20 Bolts are specifically engineered for industrial environments where aggressive chemicals such as sulfuric acid, phosphoric acid, nitric acid, and chloride-containing solutions can rapidly damage conventional stainless steel fasteners. The high nickel, chromium, molybdenum, and copper composition provides exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking, making Alloy 20 a preferred fastening material for highly corrosive processing systems.
Industries involved in chemical processing, acid handling equipment, and pharmaceutical manufacturing commonly use Alloy 20 Bolts because they provide long service life and reliable mechanical performance in severe corrosive environments. Engineers working with marine and seawater-based applications often also evaluate Copper Nickel Bolts for excellent saltwater corrosion resistance, while industries requiring lightweight high-strength corrosion resistant fastening solutions frequently compare Titanium Bolts for aerospace, offshore, and critical engineering applications.
Alloy 20 Bolts Suppliers in Europe for Chemical Processing & Acid Handling Applications
European chemical processing industries require highly corrosion resistant fastening solutions capable of performing in sulfuric acid systems, chemical storage tanks, industrial reactors, pharmaceutical production systems, and aggressive process fluid environments where standard stainless steel fasteners may experience corrosion failure.
Aurum Overseas exports certified Alloy 20 Bolts to Germany, France, Italy, Spain, Netherlands, Belgium, and other European industrial markets with full inspection certification, material traceability, and export compliance documentation.
Alloy 20 Bolts Exporters in USA for Industrial Chemical Processing Applications
The United States industrial sector extensively uses Alloy 20 fastening systems in pharmaceutical manufacturing, chemical processing plants, food processing systems, industrial reactors, acid storage systems, and process equipment exposed to highly corrosive chemical media requiring long-term corrosion resistance.
Aurum Overseas supplies certified Alloy 20 bolting solutions across the USA with third-party inspection support, export packaging, bulk manufacturing capability, and technical documentation for industrial procurement requirements.
Alloy 20 Bolts Suppliers in Gulf Countries for Petrochemical & Process Industry Applications
Industrial sectors across UAE, Saudi Arabia, Qatar, Kuwait, Oman, and Bahrain require specialized corrosion resistant fastening systems for petrochemical processing plants, offshore chemical systems, refinery units, acid handling equipment, and industrial processing facilities operating in aggressive chemical environments.
Aurum Overseas exports premium quality Alloy 20 fastening solutions throughout the Gulf region with project-based manufacturing support, international quality certifications, and dependable export logistics for industrial projects.
Industries Using Alloy 20 Bolting Solutions
Because of exceptional corrosion resistance, Alloy 20 bolts are used across industries where acidic chemical exposure is common.
| Industry | Applications |
|---|---|
| Chemical Processing | Acid transfer systems |
| Petrochemical | Corrosive process equipment |
| Pharmaceutical | Sterile production systems |
| Food Processing | Chemical cleaning systems |
| Oil & Gas | Offshore processing equipment |
| Marine Engineering | Corrosion resistant assemblies |
| Fertilizer Plants | Acid handling systems |
| Pulp & Paper | Chemical process units |
| Power Plants | Chemical dosing systems |
| Heavy Engineering | Industrial fabrication |
Why Choose Aurum Overseas for Alloy 20 Bolts?
Aurum Overseas supplies industrial fastening solutions designed for highly demanding environments where corrosion resistance, mechanical strength, chemical compatibility, and long-term reliability directly affect equipment performance and operational safety.
Our manufacturing systems, export expertise, technical support, and global supply capability allow us to serve industrial buyers, EPC contractors, engineering companies, and international distributors requiring certified fastening solutions for critical industrial applications.
- EN 10204 3.1 Test Certification
- Third Party Inspection Support
- Bulk Manufacturing Capability
- Custom Size Manufacturing
- International Export Packaging
- Fast Global Shipping
- Material Traceability Documentation
- Competitive Industrial Pricing
Frequently Asked Questions
What is Alloy 20?
Alloy 20 is a nickel-iron-chromium alloy containing copper and molybdenum specifically developed for
applications requiring excellent resistance to sulfuric acid corrosion, chloride corrosion, and
aggressive chemical processing environments.
What is UNS N08020?
UNS N08020 is the official material designation for Alloy 20, a corrosion resistant nickel alloy widely
used in chemical processing plants, pharmaceutical systems, acid handling equipment, and industrial
chemical applications.
What is DIN 2.4660?
DIN 2.4660 is the European material designation for Alloy 20. It refers to the same corrosion resistant
nickel alloy commonly used in industrial chemical processing systems requiring superior acid resistance.
Are Alloy 20 Bolts Better Than Stainless Steel 904L?
For sulfuric acid applications, Alloy 20 generally offers superior corrosion resistance compared to SS
904L. However, both materials are widely used depending on chemical compatibility and operating
conditions.
Do You Export Alloy 20 Bolts to European Countries?
Yes. Aurum Overseas exports certified Alloy 20 fastening solutions across Europe with complete material
traceability, inspection certificates, and international export documentation.
Request Technical Support & Pricing
Selecting the correct fastening material is critical when dealing with highly corrosive chemical environments where material failure directly impacts operational safety, equipment reliability, and long-term maintenance costs. Aurum Overseas supplies certified Alloy 20 Bolts manufactured according to international engineering standards for demanding industrial applications worldwide.
Our technical team supports procurement managers, EPC contractors, industrial distributors, engineering consultants, and project buyers with material selection guidance, technical documentation, custom manufacturing support, bulk pricing, and global export solutions for industrial fastening requirements.
Request a Quote