ISO 22068-2012 pdf free.Sintered-metal injection-moulded materials – Specifications.
ISO 22068 specifies the requirements for the chemical composition and the mechanical and physical properties of sintered-metal injection-moulded materials.
It is intended to provide design and materials engineers with necessary information for specifying materials in components manufactured by means of the Metal Injection Moulding (MIM) process only.
It does not apply to structural parts manufactured by other powder metallurgy routes, such as press-and-sinter or powder-forging techno’ogies.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2740. Sin fered materials, excluding hardmetals — Tensile test pieces
ISO 3369, Impermeable sintered metal materials and hardmetals — Determination of density
ISO 4498, Shtered metal materials, excluding hardmetals — Determination of apparent hardness and micro- hardness
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales, A. B, C, E, F, G, H, K,N,T)
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature ISO 9227, Corrosion tests in artificial atmospheres — Salt spray tests
IEC 60404-4, Magnetic materials — Part 4. Methods of measurement of d.c. magnetic properties of magnetically soft materials
ASTM 02638, Standard Test Method for Real Density of Calcined Petroleum Coke by Helium Pycnometer ASTM D4892, Standard Test Method for Density of Solid Pitch (Helium Pycnometer Method)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
tensile strength Rm ability of a test specimen to resist fracture when a pulling force is applied in a direction parallel to its longitudinal axis, expressed in MPa
3.2 tensile yield strength R2 load at which the material exhibits a 0.2 % offset from proportionality on a stress-strain curve in tension.
divided by the original cross-sectional area, expressed in MPa
3.3 elongation
25 plastic elongation, expressed as a percentage of the original gauge length of the specimen
NOTE The elastic strain at the 0,2 % yield strength must be subtracted from the total elongation to give the plastic elongation.
3.4 density mass per unit volume of the material, expressed in glcm3
3.5 hardness resistance of a PM material to indentation, tested under specified conditions
4 Test methods for normative properties
4.1 General
The following test methods shall be used to determine the normative properties given in Tables 1 to 6.
4.2 Chemical composition
Whenever possible, and always in cases of dispute, the methods of chemical analysis shall be those specified in the relevant International Standards. If no International Standard is available, the method may be agreed upon and specified at the time of enquiry and order.ISO 22068 pdf free download.