CONCOA Resources
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Welcome! CONCOA has been the industry leader in manufacturing precision gas controls and equipment for fabrication, scientific instrumentation, and laser cutting & welding for over 20 years. More...
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Gas Properties Reference and Materials Compatibility (see key below chart)
| Gas | Brass |
SS |
Aluminum |
| Acetylene | 1 |
• |
N/A |
| Air | • |
• |
• |
| Ammonia | X |
• |
• |
| Argon | • |
• |
• |
| Arsine | • |
• |
2 |
| Butane | • |
• |
• |
| Carbon Dioxide | • |
• |
• |
| Carbon Monoxide | • |
• |
• |
| Chlorine | X |
• |
X |
| Ethane | • |
• |
• |
| Ethylene | • |
• |
• |
| Helium | • |
• |
• |
| Hydrogen | • |
• |
• |
| Hydrogen Chloride | X |
• |
X |
| Hydrogen Sulfide | X |
• |
• |
| Isobutane | • |
• |
• |
| Krypton | • |
• |
• |
| Methane | • |
• |
• |
| Methyl Chloride | • |
• |
X |
| Neon | • |
• |
• |
| Nitric Acid | X |
• |
• |
| Nitrogen | • |
• |
• |
| Nitrous Oxide | • |
• |
• |
| Oxygen | • |
3 |
2 |
| Phosphine | N/A |
• |
• |
| Propane | • |
• |
• |
| Propylene | • |
• |
• |
| Silane | • |
• |
• |
| Sulfur Hexafluoride | • |
• |
• |
| Xenon | • |
• |
• |
Key:
• |
Satisfactory for use with the intended gas
|
X |
Unsatisfactory for use with the intended gas
|
1 |
Satisfactory with brass having a low (65-70% max) copper content. Brass with higher copper content is unacceptable
|
2 |
Generally unsatisfactory, except where specific use conditions have proven acceptable. |
3 |
Satisfactory below 3000 psig (206.9 bar) where gas velocities do not exceed 30 ft./sec. |
N/A |
No information available to determine compatibility. |