What materials are used in Vlier plungers?
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The vlier plungers are usually indicated as being made out of carbon steel or stainless steel. This distinction however does not tell you everything on the material as it mainly speaks of the main body material. The various elements incorporated in a Vlier plunger can come in a variety of materials. Below you may find the summary of all the different materials that can be used in your plunger. Below the table you will find a summary on the possible finish grades.
| Material | Description | Element |
| Stainless Steel | Good in corrosive environments | body, plunger, ball, spring |
| food processing and high temperature applications (spring can withstand 600°F) | ||
| Grades: 440C***, 300 Series per ASTM A-484 or ASTM A-582, 17-PH | ||
| Carbon Steel | Less expensive material than stainless steel and better wear resistance of the | body, plunger |
| plunger tip due to case hardening.* | ||
| Grades: 11L17 or 12L14A or Ledloy AX | ||
| Music Wire | Used on most carbon steel products. | spring |
| Nylon or Delrin® | Will not mar soft material such as aluminum or brass. | body, plunger, ball |
| Phenolic | Will not mar soft material such as aluminum or brass. | body, plunger |
| More brittle than nylon or Delrin. |
Delrin®is a registered trademark of DuPont Corp. *NOTE: All steel plungers are typically case hardened to 0.15-.010 inches in depth to a hardness of between RC 58-62. Finish platings
- Zinc plate; yellow, clear or black chromate to conversion coat
- Black oxide
- Passivate; SAE-AMS-QQ-P-35, ASTM-A-967 (stainless steel parts are passivated before assembly)
- Other special coatings
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