Basically, any malleable metal can be processed. Generally-used materials are listed in the following table. When ordering bellows, please select the materials according to use.
Basically, any malleable metal can be processed. Generally-used materials are listed in the following table. When ordering bellows, please select the materials according to use. |
| Material /Identifying symbols |
Difficult stages of process | Operating life |
Heat resistance |
Corrosion resistance |
Junction method | Characteristics & remarks | |||||
| Bellows | Diaphragm | Welding | Silver solder |
Soft solder |
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| Hydro- forming |
Rolled- forming |
Welding | |||||||||
| Phosphor Bronze /C5212 |
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Easy processing and heat treatment |
| Brass /C2400 |
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Easy processing and heat treatment (Standard western material) |
| Berylium Copper /C1720 |
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Low hysteresis, strong stress resistance, high fatigue limit |
| Stainless steel /SUS304L |
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Strong resistance to intergranular corrosion and high temperature strength |
| Stainless steel /SUS316L |
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Strong resistance to intergranular corrosion, to galvanic corrosion and to stress corrosion cracking |
| Stainless steel /SUS321 |
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Strong resistance to intergranular corrosion and to pressure, high fatigue limit, low resistance to galvanic corrosion |
| Stainless steel /SUS347 |
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Strong resistance to intergranular corrosion and to pressure, high fatigue limit, low resistance to galvanic corrosion |
| Precipitation hardening stainless steel /ASL(AM)350 |
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High fatigue limit and strong resistance to high temperature, low corrosion resistance. Semi-precipitation hardening type |
| Corrosion-proof and heatproof superalloy /NCF(Inconel)625(LCF) |
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Excellent resistance to high temperature corrosion and high strength, fatigue limit is extremely high. |
| Corrosion-proof alloy /Hastelloy C series |
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Excellent resistance to both oxidation and reduction corrosion and to high temperature corrosion |
| Nickel-copper alloy /Monel400(NW4400) |
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High resistance to corrosion, seawater and alkalinity |
| Nickel /NW2200 series |
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Strong resistance to high temperature embrittlement, to chloric ion, and to alkalinity |
| Wide variety of titanium |
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Light, high salt resistance |
| Wide variety of aluminum |
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Light, for special use |
| Constant elastic alloy /Elingbar(EL3) |
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Constant elastic material ( a little influence by temperature ) |
| High corrosion-proof metal /Eljiroy, etc |
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Corrosion resistance is extremely strong. Spring elasticity is large |
 =Easy/Excellent  = Relatively easy/Good  = Not easy/Not good  = Difficult/Poor |