ASME/ ANSI B16.9 | ASME B16.28 | MSS-SP-43 | BS1560 | BS4504 | BS10.
1/2"NB TO 48"NB IN.
Seamless and Welded.
Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS.
Elbow, Equal Tee, U Pipe Bend, Long & Short Stub End, Caps, Lap Joint Stub End
ASTM A403 / ASME SA403 304, 304L, 304H, 316, 316L, 316H, 316Ti, 310, 310s, 310h, 317, 317L, 321, 321h, 347, 347h, 904L
321H SS Buttweld Fittings are crafted from stainless steel grade 321H, distinguished by its higher carbon content (0.04-0.10%) compared to standard 321. This elevated carbon level enhances the fittings' creep resistance and mechanical properties at elevated temperatures, making them ideal for applications demanding robust performance under high heat and corrosive conditions.
ASTM A403 WP321H Fittings, designated as "WP" for wrought pipe, are manufactured through either seamless or welded processes, adhering strictly to ASTM A403 standards. They undergo meticulous dimensional checks, material testing, and non-destructive inspections to ensure compliance with stringent industry requirements for dimensions, mechanical properties, and performance reliability.
Manufacturing ASTM A403 WP321H pipe fittings involves starting with high-quality stainless steel grade 321H. These fittings are typically formed through processes like hot forging or cold forming to achieve the desired shape and dimensions. Precision machining ensures accurate sizing and smooth finishes, followed by welding using appropriate techniques to maintain corrosion resistance. Heat treatment may be applied to relieve stresses and optimize mechanical properties. Quality control measures ensure compliance with ASTM A403 standards, ensuring these fittings meet stringent requirements for reliability and performance in high-temperature and corrosive environments.
The benefits of using 321h stainless steel stub ends lie in their exceptional corrosion resistance and high temperature stability. Stub ends, made from stainless steel grade 321, are ideal for applications where reliability under extreme conditions is crucial. They provide strong, leak-proof connections in piping systems, particularly in industries such as chemical processing, aerospace, and thermal processing, where resistance to corrosion and durability are paramount. The alloy's titanium stabilization enhances its resistance to sensitization and intergranular corrosion, ensuring long-term performance and minimal maintenance requirements in demanding environments.
ASTM | EN (DIN) | JIS | UNS | GOST | BS | AFNOR |
---|---|---|---|---|---|---|
321H | 1.4878 (X10CrNiTi18-10) | SUS321H | S32109 | - | 321S51 | - |
Grade | C (max) | Mn (max) | Si (max) | P (max) | S (max) | Cr | Ni | Mo | N | Other Elements |
---|---|---|---|---|---|---|---|---|---|---|
321H | 0.04-0.10 | 2.00 | 0.75 | 0.045 | 0.030 | 17.0-19.0 | 9.0-12.0 | - | - | Ti: 4(C+N)-0.7 |
Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (Rockwell B) |
---|---|---|---|---|
321H | 205 | 515-750 | 40 | 70-90 |