NXF UNS S20910 XM-19 OD DN6-DN1200 Pressure 3000-9000lb Special Stainless Steel Forging Fitting Threaded Couping

UNS S20910 XM-19 stainless steel is an austenitic stainless steel with a blend of strength and corrosion resistance that is higher than stainless steel grades 316, 316/316L, 317, and 317/317L .The high strength, corrosion resistance, and low
magneticpermeability of this alloy allows it to be used as a material for medical implants.
Machinability
Stainless steel grade UNS S20910 XM-19 has machinability characteristics that are similar to other austenitic stainless
steels;however it requires slower speeds, more power, and higher rigidity due to its high work hardening rate. It is recommended that coated carbide tooling be used.
Forming
Stainless steel grade UNS S20910 XM-19 can be formed using the same methods applied for other austenitic stainless steels. More power for forming and forging is needed for this alloy. Forging can be done at 1177-1204°C (2150-2200°F).
Welding
Welding of stainless steel grade UNS S20910 XM-19 can be performed using traditional joining processes. Recommended filler metal should be UNS S20910 XM-19 (AWS E/ER209).
Caution should be taken while using autogenous, high power density joining processes such as EB or laser welding, due to low FN potential and severe outgassing possibility.
Heat Treatment
Final annealing process performed for several of the applications, is done at 1065°C (1950°F), which is followed by water
quenching. In case this material is used in a strongly corrosive environment, annealing should be done at 1121°C (2050°F). This alloy cannot be hardened by heat treatment.

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.

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)

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