Machinery's Handbook, 31st Edition
POWDER METALLURGY STANDARDS 1553 other processes because operations are primarily performed on highly automated equip ment, and the skills required are not as high. Powder Metallurgy Standards Why are PM standards important? Powder metallurgy is a rather young industrial tech nology. The first local industries were started in the middle of the 20th century. During the next 30–40 years, business expanded primarily within the various continents, but since the last decade, the rate of expansion has accelerated and today the business is truly global. This global business requires new modern tools to support further growth and sharp- ening of the weapons to compete with other manufacturing technologies. In this con- text, ISO standards, ASTM, and MPIF standards support confidence in powder metal - lurgy and guides end users, often with global presence, to make the right choices in using components and solutions based on metal powder. ISO Standards.— International Powder Metallurgy standards are generated by the ISO technical committee, ISO/TC 119. The five sub-committees of this technical committee have created a range of standards that address sintered metals and hard metals as well as MIM standards. These sub-committees have created the following standards: ISO 3252:1999 – Terminology ISO 3923-1 and-2 – Apparent density measurement ISO 3953 – Tap Density measurement ISO 4490 – Flow Rate ISO 18549-1 and-2 – Apparent density and rate at elevated temperatures ISO 3927 + Corrigendum 1 – Compressibility and uniaxial compression ISO 3954 – Powder sampling ISO 3995 – Green strength ISO 4491-1, -2,-3 and -4 – Oxygen content ISO 4496 – Acid insoluble content in iron, copper, tin, and bronze powders ISO 4497 – Particle sizing by dry sieving ISO 10076 – Particle sizing by sedimentation analysis ISO 10070 – Specific surface area ISO 13944 – Lubricant content ISO 13947 – Non-metallic inclusion content using powder forged specimen ISO 14167 – Testing of copper infiltration powders ISO 4492 – Dimensional changes in compaction and sintering ISO 2738 – Permeable sintered metal materials-density, oil content, open porosity ISO 4003 – Permeable sintered metal materials-bubble test pore size ISO 4022 – Permeable sintered metal materials-fluid permeability ISO 3369 – Density of impermeable sintered materials ISO 2739 – Radial crushing strength of sintered bushes
ISO 2740 – Tensile test pieces ISO 3928 – Fatigue test pieces ISO 5754 – Unnotched impact test pieces ISO 3312 – Young’s modulus measurement
ISO 3325 + Amendment – Transverse rupture strength ISO 4498 – Apparent hardness and microhardness ISO 14317 – Compressive Yield Strength ISO/TR 14321 – Metallographic preparation and examination ISO 4507 – Case-hardening depth measurement ISO 7625 – Sample preparation for chemical analysis of carbon content ISO 23519 – Sintered metal materials, excluding hard metals
ISO 28279 – Sintered metal materials ISO 3326 – Magnetization coercivity ISO 3327 – Transverse rupture strength
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