All wetted parts are made from SS-316.

Optional :

SS-316L, Hastelloy B/C, Titanium, Monel, Nickel, Inconel, Teflon coated SS-316, alloy 20, Zirconium, Tantalum, Carbon Steel etc. for different liquids corrosive to SS-316.

Amar offers all the internal & optionally external wetted parts in the same material of construction as that of body & head to give complete corrosion resisting autoclaves.
Most of the above material are available for stirred, non-stirred, fabricated, glass & shaker autocalves.

AMAR gives recommendation for material selection for particular chemicals, however it does not guarantee 100% corrosion resistance of a particular M.O.C to a particular corrosive chemicals, as it also depends on various parameters like temperature, pressures, concentration etc. of the reactions. The material listed below may not be available in all possible sizes. Hastelloy B, C & Monel are manufactured either from casting for economy or solid bar stock provided the raw material is available for that size. Other special expensive alloys like Zirconium , Tantalum etc. can be quoted on request subject to availability of raw material. Bigger reactors are normally fabricated from plates.

Stainless steel SS-316 is an excellent material for use with most organic systems. A few organic acids and organic halides can under certain conditions hydrolyze to form inorganic halogen acids, which will attack SS-316. Acetic, formic and other organic acids are routinely handled in SS-316. SS-316 is not normally the material of choice for inorganic acid systems. At ambient temperature it does offer useful resistance to dilute sulfuric, sulfurous, phosphoric and nitric acids, but sulfuric, phosphoric and nitric acids readily attack SS-316 at elevated temperature and pressures. Halogen acids attack all forms of stainless steel rapidly, even at low temperature and in dilute solutions. Although SS-316 offers excellent resistance to surface corrosion by caustics, they can cause stress corrosion cracking in stainless pressure vessels. This phenomenon begins to appear at temperature just above 100 ºC and has been the most common cause of corrosion failure in stainless laboratory vessels. SS-316 does offer good resistance to ammonia and to most ammonia compounds. Halogen salts can cause severepitting in all stainless steels. Chlorides can cause stress corrosion cracking, but many other salt solutions can be handled in stainless vessels, particularly neutral or alkaline salts. At moderate temperature and pressures, SS-316 can be used with most commercial gases. In scrupulously anhydrous systems even hydrogen chloride, hydrogen fluoride and chlorine can be used in stainless steel. Essentially all the SS-316 produced today also meets the specifications for SS-316L, low carbon stainless steel.

Hastelloy C-276 is a nickel chromium molybdenum alloy having perhaps the broadest general corrosion resistance of all commonly used alloys. It was developed initially for use with wet chlorine, but it also offer excellent resistance to strong oxidizers such as cupric & ferric chlorides & to a variety of chlorine compounds & chlorine contaminated materials. Because of its broad chemical resistance , alloy C-276 is the second most popular alloy, following SS-316 for vessels used in research & development work. It can also be used with concentrated hydrochloric, sulfuric & phosphoric acids. Alloy C-22 or HC casting equivalent to C-276 forging grade is also offered.

Hastelloy-B is an alloy, rich in nickel and molybdenum, which has been developed primarily for resistance to reducing acid environments, particularly hydrochloric, sulfuric and phosphoric. Its resistance to these acids in pure forms is unsurpassed, but the presence of ferric and other oxidizing ions in quantities as low as 50 ppm can dramatically degrade the resistance of this alloy.