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NXF UNS S17400/17-4PH/AISI 630 OD DN15-1200 Thickness SCH10-XXS Special Stainless Steel BW Concentric or Eccentric Reducer
The common forming processes for butt-welded unequal diameter pipes are reduction pressing, expansion pressing, or reduction and expansion pressing. For some specific specifications of unequal diameter pipes, stamping forming can also be adopted. The reduction forming process involves placing a tube billet with a diameter equal to that of the larger end of the unequal diameter pipe into the forming die. Through pressing along the axial direction of the tube billet, the metal moves and contracts to form the pipe. Depending on the size of the diameter change, it can be one-time or multiple pressings. The expansion forming process uses a tube billet smaller than the larger end diameter of the unequal diameter pipe.
17-4PH Introduction
Forming
Grade 17-4 stainless steel can be formed mildly.
Welding
Grade 17-4 stainless steel can be welded using common fusion and resistance welding methods. Oxyacetylene welding method is not preferred for welding this alloy.
Heat Treatment
Grade 17-4 stainless steel is soaked at 1038°C (1900°F) for 30 min and cooled below 16°C (60°F) for complete martensite
transformation in the condition A. The condition A material is treated at 482°C (900°F) for 1 h followed by cooling. Solution
treated material is soaked for 4 h at specific temperature in H925, H1025, H1075, H1100, and H1150 conditions followed by cooling in air.
Forging
Grade 17-4 stainless steel is forged at 1010°C (1850°F). Before performing this process, it is soaked at 1177°C (2150°F).
Post-work solution treatment should be performed before final hardening.
Hot Working
Grade 17-4 stainless steel can be hot worked using common processes. It is treated at 1038°C (1900°F).
Post-work solution
treatment should be performed before final hardening.
Cold Working
Grade 17-4 stainless steel can be cold worked using common techniques in spite of its high initial yield strength.
Annealing
Grade 17-4 stainless steel is annealed at 1038°C (1900°F) for 0.5 h followed by cooling rapidly.
Hardening
Grade 17-4 stainless steel has high ductility, and can be formed using all conventional techniques. Powerful equipments are required for forming this alloy because it is stronger than the regular steel. Heavy-duty lubricants are used during cold working.
Applications
Grade 17-4 stainless steel is used in the following applications:
* Nuclear reactor
* Aircraft and gas turbines
* Oil field
* Chemical process components
* Paper mill
Reducer Introduction
17-4PH Chemical Composition And Mechanical Properties.
BUTT-WELDING REDUCER DRAWING
Product physical picture
Reducer Produce Processing
1.Raw material inspection: Select qualified pipes/steel plates, verify the quality certificates, specifications and surface conditions, conduct non-destructive testing and physical property testing to ensure compliance with standard requirements.
2. Blank material processing: Cut and shape according to specifications, remove surface oxide scale and debris; for steel plates, first roll them into tubes and weld them, then smooth the weld seams to be flush with the base material after welding.
3. Heating and molding: Heat the raw material to the specified temperature and maintain it for a certain period. Then, use the processes of reducing diameter, expanding diameter, or stamping to mold it (for large diameter variations, multiple stamping processes may be required). Ensure that the transition is smooth without any wrinkles.
4. Forming and finishing: Heat the formed part to shape and round it, remove the excess parts at both ends, ensure the dimensional accuracy, and meet the requirements for subsequent processing.
5. Heat treatment and surface treatment: Perform heat treatment on the formed parts to restore the mechanical properties of the materials; remove the surface oxide layer. For stainless steel parts, additional acid washing and passivation treatment is required.
6. Groove processing and inspection: The pipe grooves are machined mechanically to facilitate subsequent welding; non-destructive testing is conducted on the weld seams and the pipe body to ensure there are no defects.
7. Finished product inspection and storage: Conduct a comprehensive inspection of appearance, dimensions, and mechanical properties. Once qualified, mark relevant information, pack them and store them in the warehouse to prevent damage during transportation.
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?
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