Raw Material Selection
The manufacturing process of buttweld fittings begins with the careful selection of raw materials.
What are the key properties of Stainless Steel 321/321H Buttweld Fittings?
Stainless Steel 321/321H Buttweld Fittings are commonly used in various industries due to their excellent corrosion resistance and high-temperature strength. Stainless Steel 321/321H Buttweld Fittings offer superior resistance to corrosion in a wide range of environments, including organic acids and moderately reducing to moderately oxidizing media. These fittings exhibit good mechanical properties at elevated temperatures, making them suitable for high-temperature applications. Stainless Steel 321H contains higher carbon content than 321, which provides improved resistance to sensitization and intergranular corrosion.
What is the manufacturing process for Stainless Steel 321/321H Buttweld Fittings?
Stainless Steel 321/321H Buttweld Fittings are typically manufactured through a process called hot forming or cold forming. In the hot forming process, the fittings are shaped by heating the stainless steel material to a suitable temperature and then using mechanical deformation techniques like bending, extrusion, or forging. Cold forming involves shaping the fittings at room temperature using processes such as cold drawing, cold rolling, or cold pressing.
Table Of Content
Are Stainless Steel 321/321H Buttweld Fittings corrosion-resistant?
Stainless Steel 321 Buttweld Fittings exhibit excellent corrosion resistance. They are resistant to a wide range of corrosive environments, including organic acids, alkaline solutions, and oxidizing and reducing media. This corrosion resistance makes them suitable for various industries, including chemical processing, oil and gas, and pharmaceuticals.
What is the maximum temperature range for using Stainless Steel 321/321H Buttweld Fittings?
Stainless Steel 321H Buttweld Fittings have a maximum service temperature of approximately 870°C (1600°F). They can maintain their mechanical strength and oxidation resistance within this temperature range.
What are the recommended welding techniques for Stainless Steel 321/321H Buttweld Fittings?
Stainless Steel 321/321H Buttweld Fittings can be welded using several techniques, including gas tungsten arc welding (GTAW/TIG), gas metal arc welding (GMAW/MIG), and shielded metal arc welding (SMAW). It is essential to use filler materials specifically designed for stainless steel 321/321H to ensure proper weld integrity and corrosion resistance.
Can Stainless Steel 321/321H Buttweld Fittings be used in high-pressure applications?
Stainless Steel 321/321H Buttweld Fittings can be used in high-pressure applications. Their robust mechanical properties, including strength and hardness, combined with excellent corrosion resistance, make them suitable for demanding environments where high pressure is involved. However, it is important to consider the specific requirements and consult relevant industry standards to ensure the fittings are appropriate for the intended high-pressure application.
| Specifications | ASTM A403 / ASME SA403 |
| Size | Seamless Butt Weld Fittings: 1/2" - 10" Welded Butt Weld Fittings: 1/2" - 48" |
| Thickness | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Type | DN15-DN1200 |
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom MSS Sp-43 Stainless Steel Pipe Fitting |
| Size Range | ½" NB to 24" NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100) ASTM A403 Stainless Steel Buttweld Fitting |
| Elbows | Angle : 22.5 deg, 30deg, 45 deg, 90 deg, 180 deg, 1.0D, 1.5D, 2.0D, 2.5D,
3D, 4D, 5D, 6D, 7D-40D . Standard: ASME B16.9, ASME B16.28, ASME B16.25, MSS SP-75 DIN2605 JISB2311 JISB2312 JISB2313, BS, GB, ISO |
| Connection | Welding |
| Manufacturing process | Forge, Cast, Push, Press, etc. |
| Key markets and industries |
Bitumen upgraders. Heavy oil refineries. Petrochemicals and acids. Nuclear power (mostly seamless). |
| Test Certificates | EN 10204/3.1B Raw Materials Certificate 100% Radiography Test Report Third Party Inspection Report, etc |
| Specialized manufacturer of | 90º Elbows, 45º Elbows, Tees, Crosses, Reducers, Pipe Cap, Stub End, Pipe Bend |
| We provide Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2, Test Certificates certifying NACE MR0103, NACE MR0175 | |
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
| Grade | C | Mn | Si | P | S | Cr | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 - 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 - 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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