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ASTM B931 – Standard Test Method for Metallographically Estimating the Observed Case Depth of Ferrous Powder Metallurgy (PM) Parts Description: Significance and Use 5.1 The engineering function of many PM parts may require an exterior portion of the part to have a hardened layer. Where case hardening produces a distinct transition in the microstructure, metallographic estimation …
ASTM B923 – Standard Test Method for Metal Powder Skeletal Density by Helium or Nitrogen Pycnometry Description: Significance and Use 5.1 Both suppliers and users of metals can benefit from knowledge of the skeletal density of these materials. Results of many intermediate and final processing steps are controlled by or related to skeletal density of the …
ASTM B922 – Standard Test Method for Metal Powder Specific Surface Area by Physical Adsorption Description: Significance and Use 5.1 Both suppliers and users of metals can benefit from knowledge of the surface area of these materials. Results of many intermediate and final processing steps are controlled by, or related to, specific surface area of the …
ASTM B890 – Standard Test Method for Determination of Metallic Constituents of Tungsten Alloys and Tungsten Hardmetals by X-Ray Fluorescence Spectrometry Description: Significance and Use 5.1 This test method allows the determination of the chemical composition of powdered and sintered tungsten-based hardmetals. This test method is not applicable to material which will not oxidize readily at …
ASTM B871 – Standard Test Method for Tear Testing of Aluminum Alloy Products (Withdrawn 2017) Description: Significance and Use 5.1 The significance of the tear test is similar to that of the notch-tensile test, and its primary usefulness is as an indicator of toughness or as a ranking test as described in Test Method E338 and Practice B646. 5.1.1 This …
ASTM B845 – Standard Guide for Mixed Flowing Gas (MFG) Tests for Electrical Contacts Description: Significance and Use 4.1 Preservation of a conducting surface on electrical contact is vital to the continued functioning of such contacts. Contamination of the surface with insulating layers formed by corrosion processes is one potential hazard. Laboratory testing of contacts in …
ASTM B841 – Standard Specification for Electrodeposited Coatings of Zinc Nickel Alloy Deposits Description: Abstract This specification covers the requirements for electrodeposited zinc nickel alloy coatings on metals. The zinc nickel coating shall be defined as Class 1. The five chromate conversion coating types shall be defined as follows: Type A shall be with colorless …
ASTM B827 – Standard Practice for Conducting Mixed Flowing Gas (MFG) Environmental Tests Description: Significance and Use 4.1 Mixed flowing gas (MFG) tests are used to simulate or amplify exposure to environmental conditions which electrical contacts or connectors can be expected to experience in various application environments (1, 2).4 4.2 Test samples which have been exposed to MFG tests …
ASTM B813 – Standard Specification for Liquid and Paste Fluxes for Soldering of Copper and Copper Alloy Tube Description: Abstract This guide establishes the requirements and test methods for liquid and paste fluxes for joining by soldering of copper and copper alloy tube and fittings in plumbing, heating, air conditioning, mechanical, fire sprinkler, and other …
ASTM B809 – Standard Test Method for Porosity in Metallic Coatings by Humid Sulfur Vapor (“Flowers-of-Sulfur”) Description: Significance and Use 5.1 A major use of this test procedure is for determining coating quality. Porosity tests are indications of the completeness of protection or coverage offered by the coatings, since the coatings described in 1.2 are intended to be …
