Do you need to measure the tap density of your metal powders according to ASTM B527?
Securing compression and sintering processes for the ASD sector with ASTM B527
In the Aerospace, Space, and Defense (ASD) sectors, precise knowledge of the physical properties of metal powders is a safety imperative. Tap density (or tapped density) is a fundamental data point for anticipating powder behavior during mold filling and ensuring the compactness of your parts.
ASTM B527 defines a standard test method for determining the tap density of metal powders and compounds. It measures a powder's capacity to re-arrange itself under the effect of controlled vibrations or mechanical tapping.
At FILAB, we support manufacturers in the ASD supply chain with the physical characterization of their powders according to ASTM B527. Our goal is clear: to ensure the reliability of your technical and industrial decisions.
ASTM B527: a key challenge for material densification
Determination of tap density according to ASTM B527
The ASTM B527 standard relies on the use of a Tap Density Tester (or Tapped Volumeter). A known quantity of powder is placed in a graduated cylinder , which undergoes a defined number of mechanical drop cycles until the powder volume becomes constant.
It is specifically used to:
- Evaluate the packing degree of Titanium, Nickel, or Inconel powders.
- Calculate the Carr Index or Hausner Ratio (linked to apparent density) to predict flowability.
- Optimize pressing steps in Powder Metallurgy (PM).
In the Aerospace and Defense industries, mastering this property according to ASTM B527 has a direct impact on:
- Reduction of shrinkage during sintering.
- Homogeneity of the component's internal structure.
- Long-term reliability of strategic components produced by Isostatic Pressing (HIP/CIP) or Additive Manufacturing.
FILAB, a laboratory tailored to Aerospace & Defense requirements
An analytical park dedicated to ASTM B527 testing
Analysis according to ASTM B527 requires standardized equipment guaranteeing a constant drop height and tap frequency. To meet these requirements, FILAB provides its clients with state-of-the-art tools :
Dedicated material expertise services
At FILAB, ASTM B527 analysis is part of a comprehensive powder characterization approach. We do not just measure a final volume: we analyze your material’s aptitude for implementation. Our teams work on :
Quality monitoring of powders between different manufacturing batches
Expertise on compactness defects in sintered parts
Study of the influence of grain morphology on packing behavior
Why Choose FILAB ?
- 45 years of recognized expertise in analysis and materials science
- Dual competence: Chemistry / Materials
- Specializing in metallic alloys and critical applications
- Customer qualification : Safran, Dassault Aviation, and Framatome
- ISO 17025 Accreditation regarding metallic alloys
Analysis of Iron, Aluminium, Molybdenum, Copper, Tin, Chromium, Titanium, Lead, Nickel, Zinc
Learn moreOur analytical services based on ISO and ASTM standards for the ASD sector
Our analytical services in accordance with MIL requirements for the ASD sector
Our FAQ
Apparent Density (ASTM B212) measures the volume occupied by the powder after free flow. Tap Density (ASTM B527) measures the volume after particles have been re-arranged by tapping, thus eliminating a large portion of the interstitial voids.
These two indicators are calculated from the results of ASTM B527 and B212. They allow for the indirect quantification of a powder's flowability and cohesion: the smaller the difference between apparent and tapped density, the better the flowability.
In accordance with the standard, a test sample of 100 grams is generally recommended for use with a 100 mL cylinder. For high-density powders (such as Tungsten), smaller volumes may be adapted.
ASTM B527 specifies a number of cycles (often 3000 or until volume stability) to ensure that packing is complete. An insufficient number of taps would lead to an underestimation of the true packing density.
To get a quote, you can contact our teams via our contact form, by phone, or by email. Simply send us your requirements (type of material, desired analysis, specific standard, urgency, sample quantity...). We will then send you a personalized technical and price proposal within 24-48 hours.
