Alpha Overseas(AOS) manufactures and trades SS 321 Compression Tube Fittings, which is stabilized against chromium carbide formation by the addition of titanium. This addition in Alloy 321 Compression Fittings is made to reduce or eliminate chromium carbide precipitation - resulting from welding or exposure to high temperatures. Grade 321 Tube Fittings are used because they are not sensitive to intergranular corrosion after heating within the carbide precipitation range of 425 Degree C – 850 Degree C. Characterised by high corrosion resistance in general atmospheric corrosive environments, Type 321 Ferrule Fittings exhibits excellent resistance to most oxidizing agents, dyestuffs, sterilizing solutions, general foodstuffs, most organic chemicals plus a wide variety of inorganic chemicals, also nitric acid, steam combustion gases, hot petroleum gases, and to a lesser extent sulphuric acid.
The weld areas in these AISI 321 Double Ferrule Fittings, with temperatures 930 Degree F – 1470 Degree F, are often called carbide precipitation zone – in which Chromium (Cr) combines with Carbon (C) and precipitates chromium carbides at the grain boundaries significantly reducing corrosion resistance of steel in this zone. These 321 Stainless Steel Compression Tube Fittings provides excellent resistance to oxidation and corrosion and possesses good creep strength.
The resistance to sensitization of these Stainless Steel UNS S32100 Tube Fittings, coupled with its higher strength at high temperature makes it suitable in application where SS 304 will become sensitized, or where SS 304L has insufficient hot strength.
ASTM A182 Compression Tube Fittings Specification :
Size : 1/16”OD to 2”OD, 2mm OD to 50mm OD
Specification : ASTM A182 / ASME SA182
Thread : NPT, BSP, BSPT, UNF, ISO, SAE etc.
Pressure Rating : 6000PSI for Stainless Steel, 300/1000/3000PSI for Brass
|SS 321||9.00 – 12.00||0.08||2.00||0.045||0.030||1.00||17.0-19.0|
|Element||Density||Melting Point||Tensile Strength||Yield Strength (0.2%Offset)||Elongation|
|SS 321||8.0 g/cm3||1454 °C (2650 °F)||Psi – 75000 , MPa – 515||Psi – 30000 , MPa – 205||40 %|
ASIA : UAE , SAUDHI ARABIA , OMAN , KUWAIT , BHARAIN , QATAR , JORADAN , ISRAEL , SRILANKA , MALAYSIA , SINGAPORE , BRUNEI, INDONESIA , PHILIPPINES , RUSSIA , TURKEY .
AFRICA : EGYPT , TANZANIA , SOUTH AFRICA , MOROCCO , ALGERIA , TUNISIA . EUROPE : FRANCE , SPAIN , ITALY , CROATIA , AUSTRIA ,SLOVAKIA , NETHERLAND , CZECHIA , PLOAND , GERMANY , BELGIUM , ALBANIA , SLOVENIA .
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