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NXF UNS S3040 304/1.4301 OD DN6-DN1200 Pressure 3000-9000lb Special Stainless Steel Forging Fitting Threaded Couping
2026-04-20 16:11 NXF GROUP
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Product Description
UNS S20910 XM-19 Stainless Steel Introduction
UNS S20910 XM-19 Stainless Steel Introduction
UNS S30400 304 stainless steel is the most widely used basic austenitic stainless steel with excellent comprehensive mechanical properties and general corrosion resistance, which is superior to ferritic and martensitic stainless steel grades, while its corrosion resistance is lower than molybdenum-containing grades such as 316, 316/316L, 317, and 317/317L. The outstanding ductility, toughness, corrosion resistance and low magnetic permeability of this alloy allows it to be extensively applied in food processing equipment, architectural decoration, pipeline systems, daily hardware and general industrial structural components.
Machinability
Stainless steel grade UNS S30400 304 has machinability characteristics that are similar to other austenitic stainless
steels;however it requires slower speeds, more power, and higher rigidity due to its obvious work hardening rate during cutting processing. It is recommended that coated carbide tooling be used.
Forming
Stainless steel grade UNS S30400 304 can be formed using the same methods applied for other austenitic stainless steels. Excellent plasticity and cold formability are featured for this alloy. Forging can be done at 1149-1260°C (2100-2300°F).
Welding
Welding of stainless steel grade UNS S30400 304 can be performed using all traditional joining processes. Recommended filler metal should be UNS S30800 308 (AWS E/ER308).
Caution should be taken while using autogenous, high power density joining processes such as EB or laser welding, due to potential intergranular corrosion risk after high-temperature thermal cycles.
Heat Treatment
Final annealing process performed for several of the applications, is done at 1040°C (1900°F), which is followed by water
quenching. In case this material is used in a strongly corrosive environment, annealing should be done at 1093°C (2000°F). This alloy cannot be hardened by heat treatment.
Machinability
Stainless steel grade UNS S30400 304 has machinability characteristics that are similar to other austenitic stainless
steels;however it requires slower speeds, more power, and higher rigidity due to its obvious work hardening rate during cutting processing. It is recommended that coated carbide tooling be used.
Forming
Stainless steel grade UNS S30400 304 can be formed using the same methods applied for other austenitic stainless steels. Excellent plasticity and cold formability are featured for this alloy. Forging can be done at 1149-1260°C (2100-2300°F).
Welding
Welding of stainless steel grade UNS S30400 304 can be performed using all traditional joining processes. Recommended filler metal should be UNS S30800 308 (AWS E/ER308).
Caution should be taken while using autogenous, high power density joining processes such as EB or laser welding, due to potential intergranular corrosion risk after high-temperature thermal cycles.
Heat Treatment
Final annealing process performed for several of the applications, is done at 1040°C (1900°F), which is followed by water
quenching. In case this material is used in a strongly corrosive environment, annealing should be done at 1093°C (2000°F). This alloy cannot be hardened by heat treatment.
Forging Threaded Couping Introduction
Forging Threaded Couping Introduction
The threaded double-port coupling—also known as an internally threaded straight connector, sleeve, or pipe coupling—serves as a core connecting component within piping systems, used to join two sections of pipe of the same specification. It is widely utilized in applications such as water supply and drainage, gas distribution, HVAC, hydraulic systems, and industrial fluid transport. This product is precision-forged from high-quality metal, featuring standard internal threads at both ends. During installation, it can be directly screwed onto and secured to externally threaded pipes, valves, instruments, or other fittings, thereby facilitating the linear extension, butt-joining, and anchoring of pipelines. Boasting a compact structure and reliable sealing performance, the product requires no complex tools for installation and allows for convenient assembly, disassembly, and maintenance. Its finely finished surface ensures robust durability, corrosion resistance, and high pressure tolerance, enabling stable, long-term operation across a wide range of working conditions. It stands as an essential and versatile hardware component for both industrial and residential piping systems.
Forging Threaded Couping Drawing
Forging Threaded Couping Drawing
Chemical Composition And Mechanical Properties
Chemical Composition And Mechanical Properties
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Product processing
Forging Threaded Coupling Produce Processing
Forging Threaded Coupling Produce Processing
1. Raw Material Preparation and Cutting
Material Selection: Select high-quality round bar stock (e.g., Carbon Steel A105, Stainless Steel 304/316L, or Alloy Steel).
Cutting: Use a sawing machine or shearing machine to cut the bars into billets of precise weight and length.
2. Heating
The billets are heated in an induction furnace or gas furnace to the forging temperature (e.g., 1150°C–1250°C for carbon steel)to ensure optimal plasticity.
3. Die Forging (Forming)
Pressing: The heated billet is placed into the die of a friction press or hydraulic press.
Forming: Under high pressure, the metal fills the die cavity, creating a dense grain flow. This results in a solid or
pre-pierced rough forging.Trimming: Excess metal (flash) generated during forging is trimmed off.
4. Normalizing (Heat Treatment)
Material Selection: Select high-quality round bar stock (e.g., Carbon Steel A105, Stainless Steel 304/316L, or Alloy Steel).
Cutting: Use a sawing machine or shearing machine to cut the bars into billets of precise weight and length.
2. Heating
The billets are heated in an induction furnace or gas furnace to the forging temperature (e.g., 1150°C–1250°C for carbon steel)to ensure optimal plasticity.
3. Die Forging (Forming)
Pressing: The heated billet is placed into the die of a friction press or hydraulic press.
Forming: Under high pressure, the metal fills the die cavity, creating a dense grain flow. This results in a solid or
pre-pierced rough forging.Trimming: Excess metal (flash) generated during forging is trimmed off.
4. Normalizing (Heat Treatment)
To relieve internal stresses from forging, the couplings undergo normalizing (heating followed by air cooling). This refines the grain structure and ensures the fitting won't be brittle under high pressure.
5. Machining (CNC)
Drilling and Boring: The center of the forging is drilled through and bored to the precise internal diameter.
Turning: The outer diameter (OD) and faces are turned to ensure uniform wall thickness and perfectly square ends.
Threading: Threads (such as NPT, BSPT, or Metric) are cut into both ends. For a double-interface coupling, high concentricity is required to ensure the pipeline remains straight after connection.
6. Pickling and Surface Treatment
Pickling: Removes oxide scales (primarily for stainless steel).
Anti-corrosion: Carbon steel couplings are typically electro-galvanized, hot-dip galvanized, or treated with phosphating/anti-rust oil.
7. Inspection and Marking
Dimensional Check: Verification of OD, wall thickness, and length using calipers.
Thread Inspection: Threads are strictly tested using Thread Plug Gauges to check taper, pitch, and engagement depth.
Marking: Permanent stamps are applied showing material grade, pressure rating (e.g., 3000LB, 6000LB), size, and standard (e.g.,ASME B16.11).
8. Cleaning and Packaging
Clean out metal chips and oil, install plastic protectors on threads to prevent damage, and pack for shipment.
5. Machining (CNC)
Drilling and Boring: The center of the forging is drilled through and bored to the precise internal diameter.
Turning: The outer diameter (OD) and faces are turned to ensure uniform wall thickness and perfectly square ends.
Threading: Threads (such as NPT, BSPT, or Metric) are cut into both ends. For a double-interface coupling, high concentricity is required to ensure the pipeline remains straight after connection.
6. Pickling and Surface Treatment
Pickling: Removes oxide scales (primarily for stainless steel).
Anti-corrosion: Carbon steel couplings are typically electro-galvanized, hot-dip galvanized, or treated with phosphating/anti-rust oil.
7. Inspection and Marking
Dimensional Check: Verification of OD, wall thickness, and length using calipers.
Thread Inspection: Threads are strictly tested using Thread Plug Gauges to check taper, pitch, and engagement depth.
Marking: Permanent stamps are applied showing material grade, pressure rating (e.g., 3000LB, 6000LB), size, and standard (e.g.,ASME B16.11).
8. Cleaning and Packaging
Clean out metal chips and oil, install plastic protectors on threads to prevent damage, and pack for shipment.
Our advantage as follow:
1.We have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can giveyou the lowest price.
2. We can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality.Such as PMI testing
3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
4.We have excellent quality certificate system and trademark certificate
5.We 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.We have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
2. We can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality.Such as PMI testing
3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
4.We have excellent quality certificate system and trademark certificate
5.We 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.We have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
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 in 1980, 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 as follow:
1.We 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.
2. We can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality.Such as PMI testing
3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
4.We have excellent quality certificate system and trademark certificate
5.We 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.We have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Established in 1980, 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 as follow:
1.We 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.
2. We can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality.Such as PMI testing
3. Our biggest advantage is 3S service. Small quantity, short time, special materials.
4.We have excellent quality certificate system and trademark certificate
5.We 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.We have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Chinese Trademark Certificate
Chinese Trademark Certificate
EC REP
EC REP
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:3S Service (Small Quantity/Short Time/Special Material)
We have our own factories, quality can be controlled seriously.
We Specialize in manufacturing about 21 years.
We have professional testing department and testing equipment.
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;
LanguageSpoken:English,Chinese,Spanish,Russian
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:3S Service (Small Quantity/Short Time/Special Material)
We have our own factories, quality can be controlled seriously.
We Specialize in manufacturing about 21 years.
We have professional testing department and testing equipment.
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;
LanguageSpoken:English,Chinese,Spanish,Russian
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