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Spiroflex d.o.o.
Ljudevita Gaja 7
35 208 Ruščica
Croatia

 

Phone: +385 35 _212420
Telefax: +385 35 _457105
e-mail: info@spiroflex.hr

 

Materials for bellows

Materials Temperature °C
Type EN 10027-2 Steel name USA AISI min. max.
Stainless austenitic steels 1.4301 X5CrNi18-10 304 -196 550
1.4306 X2CrNi19-11 304L -270 550
1.4401 X5CrNiMo17-12-2 316 -196 550
1.4404 X2CrNiMo17-12-2 316L -270 550
1.4435 X5CrNiMo18-14-3   -270 550
1.4541 X6CrNiTi18-10 321 -270 550
1.4550 X6CrNiNb18-10 347 -196 550
1.4571 X6CrNiMoTi17-12-2 316Ti -270 550
Heat resistant austenitic steels 1.4828 X15CrNiSi20-12 309 -196 550
1.4876 X10NiCrAlTi32-21
X10NiCrAlTi32-21 (H)
Incoloy 800 -196 600 (900)
Nickel alloys 2.4610 NiMo16Cr16Ti Hastelloy C4 -196 400
2.4816 NiCr15Fe Inconel 600 -10 (-270) 450 (900)
2.4856 NiCr22Mo9Nb Inconel 625 -196 (-270) 450 (900)
2.4360 NiCu30Fe Monel 400 -196 425
2.4858 NiCr21Mo Incoloy 825 -10 540

Bellows materials

Spiroflex designs and manufactures bellows out of material that is kept on stock, or procures it as new contract is agreed, as follows.

W.Nr. 1.4541 (AISI 321)
The basic material for bellows manufacturing which generally satisfies demands for wide application e.g. cooling or heating systems. This material contains titanium which is used as stabilizing element, increases resistance to intercrystalline corrosion.
 
W.Nr. 1.4571 (AISI 316Ti)
Normally used in heating systems, food and chemical industry, and also in exhaust systems. Just as by 1.4541 material, the titanium content increases resistance to intercrystalline corrosion, the addition on manganese increases resistance to pitting corrosion at media which contain chlorides.
 
W.Nr. 1.4404 (AISI 316L)
Material with low carbon content (under 0,03%) and good resistance to intercrystalline corrosion. This material and 1.4571 are interchangeable and generally can be used for the same application.
W.Nr. 1.4828 (AISI 309)
Heat resistant austenitic steel for application at high temperatures and aggressive media. It has high resistance to corrosion and oxidation caused by high temperatures and it is ideal for applications where mechanical properties are important. It is used at furnace engineering and other high temperature applications.
 
W.Nr. 1.4876 (Incoloy 800H)
Heat resisting high strength steel, resistant to oxidation and other damaging effects at high temperature exposure. General corrosion resistance is excellent. Suitable for temperatures of 600 (900) °C.
 
W.Nr. 2.4816 (Inconel 600)
Nickel-chromium alloy for application at high temperatures and aggressive media. Resistant to chloride stress corrosion cracking, corrosion by high purity water, caustic corrosion. Used in chemical and food industry, nuclear engineering.
W.Nr. 2.4856 (Inconel 625 LCF)
Material specially produced for application for bellows. Resistant to sea water, pitting and crevice corrosion. Used in chemical processing, marine and nuclear engineering, aerospace engineering etc.
 
W.Nr. 2.4360 (Monel 400)
Nickel-copper alloy with high resistance to sea water and steam at high temperatures, resistant in a range of acidic and alkaline environments. It is used in chemical industry, desalination, oil industry, marine engineering etc.
 
W.Nr. 2.4858 (Incoloy 825)
This is austenitic nickel-iron-chromium alloy with addition of molybdenum and copper. Very resistant to a variety of corrosion environments like: chloride pitting, stress corrosion cracking, intercrystalline corrosion and crevice corrosion. It is used in chemical, oil, gas industry, acid production, pollution control equipment etc.