Powder Metallurgy Standards

International Powder Metallurgy standards are generated by the technical committee, ISO/TC 119.

The five sub-committees of this technical committee have created a range of standards that address sintered metals and hardmetals. Work is also underway to create Metal Injection Moulding standards, but, to date, none of these have yet been approved for publication.

Sub-committee 1

Focuses on terminology and has created the standard on PM vocabulary ISO 3252:1999

Sub-committee 2

Focuses on powder characterisation methods (excluding hardmetals) and has created the following standards:

  • Apparent Density measurement – ISO 3923-1 and -2
  • Tap Density measurement – ISO 3953
  • Flow Rate – ISO 4490
  • Apparent Density and Flow Rate at elevated temperatures –  1SO 18549-1 and -2
  • Compressibility in uniaxial compression – ISO 3927 + Corrigendum 1
  • Powder sampling – ISO 3954
  • Green Strength – ISO 3995
  • Oxygen Content – ISO 4491-1, -2, -3 and -4
  • Acid insoluble content in iron, copper, tin and bronze powders – ISO 4496
  • Particle sizing by dry sieving – ISO 4497
  • Particle sizing by sedimentation analysis – ISO 10076
  • Specific surface area – ISO 10070
  • Lubricant content – ISO 13944
  • Non-metallic inclusion content using powder forged specimen – ISO 13947
  • Testing of copper infiltration powders – ISO 14168
  • Dimensional changes in compaction and sintering – ISO 4492
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Sub-committee 3

Focuses on sintered metal part characterisation methods (excluding hardmetals) and has created:

  • Permeable sintered metal materials – density, oil content, open porosity – ISO 2738
  • Permeable sintered metal materials – bubble test pore size – ISO 4003
  • Permeable sintered metal materials – fluid permeability – ISO 4022
  • Density of impermeable sintered materials – ISO 3369
  • Radial crushing strength of sintered bushes – ISO 2739
  • Tensile test pieces – ISO 2740
  • Fatigue test pieces – ISO 3928
  • Unnotched impact test piece – ISO 5754
  • Young’s modulus measurement  –  ISO 3312
  • Transverse rupture strength – ISO 3325 + Amendment 1
  • Apparent hardness and microhardness – ISO 4498
  • Compressive Yield Strength – ISO 14317
  • Metallographic preparation and examination – ISO/TR 14321
  • Case-hardening depth measurement – ISO 4507
  • Sample preparation for chemical analysis of carbon content – ISO 7625

Sub-committee 4

Addresses both powder and sintered part characterisation methods, specifically for hardmetals:

  • Magnetisation coercivity – ISO 3326
  • Transverse rupture strength – ISO 3327
  • Rockwell hardness testing – ISO 3738-1 and -2
  • Vickers hardness testing – ISO 3878
  • Total carbon content – ISO 3907
  • Insoluble (free) carbon content – ISO 3908
  • Cobalt content – ISO 3909
  • Sampling and testing of sintered hardmetals – ISO 4489
  • Metallography – ISO 4499-1 and -2
  • Titanium content – ISO 4501
  • X-ray fluorescence analysis – ISO 4503 and ISO 4883
  • Metallographic assessment  of porosity and uncombined carbon – ISO 4505
  • Compression testing – ISO 4506
  • Sampling and testing of powders using sintered test-pieces – ISO 4884
  • Chemical analysis by flame atomic absorption spectrometry – ISO 7627-1, -2, -3, -4, -5 and -6
  • Sulphur and carbon in cobalt metal powders – ISO 11873 + Corrigendum 1
  • Silicon in cobalt metal powders – ISO 11877, ISO 17352
  • Palmqvist toughness testing – ISO 28079

Sub-committee 5

Addresses material specification standards and has created ISO 5755:2001 – Sintered Metal Materials – Specifications

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