Materials used by Mera Bellows

It is very important to choose the correct material for your metal bellows.


Non-ferrous metals

like brass (e.g. CuZn20) or bronze (e.g. CuSn6) are appropriate for applications under normal conditions. Bellows made of non-ferrous metal are often used in the measuring and control technology at lower pressure and using passive, non-aggressive mediums. For example the thermostatic head at radiators.

Stainless Steel

-bellows have outstanding tensile strength and corrosion resistance. If the bellows has to withstand high pressures or aggressive, corrosive chemicals, non-ferrous metals cannot satisfy the requirements. So preferably stainless steel bellows are used under more extreme conditions but also in production lines that place a high emphasis on cleanliness, like the food industry. Aside from that, whenever mediums of very high temperatures flow through the bellows, stainless steel is the preferred choice. Mera Bellows also provides hydroformed stainless steel bellows for the semiconductor industry or applications in vacuum or ultra-high vacuum, such as vacuum valves, − pumps, vacuum interrupters − and switches. For this highly demanding scope of application, the bellows must be uncompromisingly stainlessness. Our abilities to supply seamless bellows, in addition to sophisticated washing technologies at Mera Bellows, help us to meet these requirements.




is an alloy of copper with 0.4-2% beryllium. Bellows of beryllium-copper have a high electric conductivity, whilst achieving the required non-magnetic signature. Bellows made of beryllium copper can be applied in a wide range of temperatures. Due to their outstanding elasticity, beryllium-copper bellows react on the smallest changes, e.g. in terms of their surrounding pressure. They are widely used in electrical engineering, measurement and control technology or aviation.


is a nickel-copper alloy with enormous resistance towards different acid and alkaline solutions. That is why bellows of monel are often requested for chemical applications. Soldering of monel bellows is relatively simple. They are also widely used in valve-technology (fluid handling).

For requests of other materials we try to develop customized solutions.


mb6Common materials

Stainless steel
X6CrNiTi1810 1.4541 321
X6CrNiMoTi17122 1.4571 316Ti
X2CrNiMo17132 1.4404 316L
Bronze / Brass
CuSn6 (Bronze) 2.1020 C51900
CuSn8 (Bronze) 2.1030 C52100
CuZn20 (Brass) 2.0250 C24000
Special Alloys
CuBe2 (Beryllium-Copper) 2.1247 C17200
NiCu30Fe (Monel400) 2.4360 B127