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NXF UNS N08020/Alloy 20/2.4660/NiCr20CuMo Diameter 15-1200mm Length 1-12m Nickel Alloy 20 Seamless Round Straight Pipe
2026-10-21 16:33 NXF GROUP
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Products Description
Alloy 20 Introduction
Alloy 20 is an austenitic stainless steel containing less than 50% iron and is used in applications involving sulfuric acid. Its
corrosion resistance also finds other applications in the chemical, petrochemical, power generation, and plastics industries.Alloy 20 exhibits superior resistance to pitting and chloride ion corrosion compared to 304 stainless steel and is comparable to316L stainless steel. Its copper content protects it from sulfuric acid. Alloy 20 is typically selected to address the potentialstress corrosion cracking issues of 316L stainless steel.
corrosion resistance also finds other applications in the chemical, petrochemical, power generation, and plastics industries.Alloy 20 exhibits superior resistance to pitting and chloride ion corrosion compared to 304 stainless steel and is comparable to316L stainless steel. Its copper content protects it from sulfuric acid. Alloy 20 is typically selected to address the potentialstress corrosion cracking issues of 316L stainless steel.
Nickel Alloy 20 Seamless Round Straight PipeIntroduction
Nickel Alloy 20, also known as Carpenter 20, is a niobium-stabilized austenitic nickel-iron-chromium alloy with controlled
additions of copper and molybdenum. It is primarily developed for outstanding resistance to sulfuric acid, and also offers
reliable performance against phosphoric acid, nitric acid, mixed acid environments, organic acids, chlorides and other corrosive chemicals. The niobium element effectively prevents chromium carbide precipitation during welding or high-temperature exposure, which greatly minimizes the risk of intergranular corrosion.
Nickel Alloy 20 Round Pipe can be produced as seamless pipe or welded pipe, followed by solution annealing and pickling for uniform microstructure and stable corrosion resistance. It balances good ductility, high tensile strength, excellent weldability and formability. Unlike many stainless steels, Alloy 20 shows strong resistance to stress corrosion cracking in hot chloride-containing service conditions.
This round pipe is widely specified for critical fluid transfer in chemical processing, pharmaceutical manufacturing, food and beverage processing, metal pickling lines, waste acid recovery, pollution control equipment, petroleum refining and synthetic fiber production. Common applications include process piping, heat exchanger tubes, reactor feed lines, storage tank connections and scrubber piping.
additions of copper and molybdenum. It is primarily developed for outstanding resistance to sulfuric acid, and also offers
reliable performance against phosphoric acid, nitric acid, mixed acid environments, organic acids, chlorides and other corrosive chemicals. The niobium element effectively prevents chromium carbide precipitation during welding or high-temperature exposure, which greatly minimizes the risk of intergranular corrosion.
Nickel Alloy 20 Round Pipe can be produced as seamless pipe or welded pipe, followed by solution annealing and pickling for uniform microstructure and stable corrosion resistance. It balances good ductility, high tensile strength, excellent weldability and formability. Unlike many stainless steels, Alloy 20 shows strong resistance to stress corrosion cracking in hot chloride-containing service conditions.
This round pipe is widely specified for critical fluid transfer in chemical processing, pharmaceutical manufacturing, food and beverage processing, metal pickling lines, waste acid recovery, pollution control equipment, petroleum refining and synthetic fiber production. Common applications include process piping, heat exchanger tubes, reactor feed lines, storage tank connections and scrubber piping.
Nickel Alloy 20 Seamless Round Straight PipeDrawing
Alloy 20 Chemical Composition And Mechanical Properties
Factory and Product Pictures
Nickel Alloy 20 Seamless Round Straight PipeProduct Pictures
Alloy 20 PMI spectral testing proves
Video of a customer visiting us
Product processing
Nickel Alloy 20 Seamless Round Straight Pipe Product Processing
1.Raw Material Receiving and Inspection
Alloy 20 solid billets are delivered with original mill test certificates. Our QC team first verifies the heat number, chemical composition and mechanical data against ASTM B464 requirements. Sampling is arranged for spectral analysis and hardness verification. Visual and ultrasonic inspection is carried out to check for surface cracks, porosity, slag inclusions and internal segregation. Only qualified billets are labelled and transferred to the production area; defective materials are isolated and returned.
2.Heating, Hot Piercing and Hot Extrusion
3.Pickling, Lubrication and Multi-pass Cold Drawing
5.Finishing, Surface Treatment and Non-Destructive Testing
6.Marking, Bundling, Packaging and Shipment
2.Heating, Hot Piercing and Hot Extrusion
The billet is loaded into a controlled gas-fired heating furnace and heated uniformly to the precise forming temperature with strict temperature holding time to avoid overheating or burning. Hot piercing is performed on a rotary piercing mill to form a hollow tube shell. Afterwards, the pierced shell is fed into the extrusion press for hot extrusion. Extrusion speed, die temperature and lubrication parameters are tightly controlled to guarantee consistent wall thickness, roundness and uniform metallographic structure of the mother tube.
3.Pickling, Lubrication and Multi-pass Cold Drawing
Hot extruded tube blanks are sent to pickling tanks to remove high-temperature oxide scale. After rinsing and drying, a special drawing lubricant is coated on both inner and outer surfaces. The tube blank undergoes multi-pass cold drawing with intermediate straightening between passes. Each drawing pass gradually reduces the outer diameter, inner diameter and wall thickness to approach the target dimension. This process improves surface finish and dimensional precision.
4.Solution Annealing Heat Treatment
Cold-worked tubes are loaded into a bright annealing furnace with inert protective atmosphere to conduct solution annealing. The heating cycle dissolves intermetallic precipitates and eliminates residual stress accumulated during cold drawing. Controlled slow cooling prevents chromium and niobium carbide precipitation, which is critical to preserve the excellent corrosion resistance of Alloy 20. Temperature curve and holding time are recorded for each batch.
5.Finishing, Surface Treatment and Non-Destructive Testing
Heat-treated pipes are trimmed to the required cut lengths, then pickled and passivated to obtain a clean uniform matte surface. Full inspection is implemented: dimensional check (OD, ID, wall thickness, straightness), visual surface inspection for scratches and pits. NDT including ultrasonic testing and eddy current testing is applied to detect subsurface cracks, laminations and other hidden defects. Unqualified pieces are marked and segregated for rework or scrap.
6.Marking, Bundling, Packaging and Shipment
Pipes that pass all inspections are permanently marked with alloy grade, specification, heat number, ASTM standard and batch code. Pipes are bundled with protective separators to avoid surface abrasion. Waterproof wrapping and sturdy wooden cases are used for export packing. The corresponding MTR document covering chemical analysis, mechanical test and NDT records is prepared and attached to the shipment for full quality traceability.
Our NXF GROUP advantage as follow
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Packing & Delivery
Packing
Delivery
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories.Established in1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship." Our advantage:3S Service(Small Quantity/Short Time/Special Material)
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
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