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Gayatri Tubes is a renowned name in supplying and manufacturing of SS 321 / 321H compression tube fittings. We have been part of this industry for many years serving our clients with our superior quality products. We specialize in these fitting in both standard and non-standard shapes and sizes. SS 321 321 H compression tube fittings is a made from common and widely used austenitic steel alloy. It does also have titanium in it. It is quite similar to SS 304 but the addition of Titanium substantially increases the carbon content in the alloy. This results in a reduction of precipitation of carbide during welding. It delivers excellent resistance to oxidation due to the effect of air, water or chemicals. Its property of extremely high resistance to all types of corrosion makes it suitable for many process-oriented industrial uses.
It comes with a workable creep length. It is very convenient for forming and drowning applications. One of the most important features it exhibits is that it is resistant to most of the organic and inorganic chemicals. Its resistance to nitric and sulfur is strong enough. And in addition to all, it shows resistance to intergranular corrosion. These fittings eliminate the formation of chromium carbides as it ties up the carbon and nitrogen as carbides or nitrides. SS 321H Male fittings are subject to pitting and crevice corrosion when it comes in contact with warm chloride environments.
SS UNS S32100, S32109 Tube Fittings find its utility in high-temperature environments. The temperature can go up to 900° C. as it exhibits tremendous forming and welding abilities and that is why many industries use it when operating temperatures are above 500 degrees Celsius. SS 321 is a high carbon version of SS 321. It has found uses in several industries and industrial processes that is why these are quite popular. Some of those are in oil refinery equipment, in pressure vessels, industrial boilers, to manufacture chemical and pharmaceutical equipment, in chemical process heat exchangers, petrochemical refineries, etc. We designed our fittings to carry high-pressure gas or fluid in Oil, Gas, Filtration, Refining, Petrochemical and other Offshore Industries. Our team is potent enough to satisfy a customized demand.
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
| SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
| SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
| Specifications | ASTM A182 / ASME SA182 |
| PTFE Standards | ASTM D1710, ASTM D3294 |
| Size | 1/16”OD to 2”OD, 2mm OD to 50mm OD |
| Thread | NPT, BSP, BSPT, UNF, ISO, SAE etc. |
| Pressure Rating | 6000 PSI for Stainless Steel, 300/1000/3000PSI for Brass |
| 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 % |
