ISO 11124-3:2018 pdf download – Preparation of steel substrates beforeapplication of paints and related products – Specifications for metallicblast-cleaning abrasives — Part 3: High-carbon cast-steel shot and grit.
ISO 11125-2, Preparation of steel substrates before application of points and related products — Test methods for metallic blast-cleaning abrasives — Part 2: Determination of particle size distribution
ISO 11125-3. Preparation of steel substrates before application of paints and related products — Test methods for metallic blast-cleaning abrasives — Part 3: Determination of hardness
ISO 11125-4. Preparation of steel substrates before application of paints and related products — Test met hods for metallic blast-cleaning abrasives — Part 4: Determination of apparent density
ISO 11125-5, Preparation of steel substrates before application of points and related products — Test methods for metallic blast-cleaning abrasives — Part 5: Determination of percentage defective particles and of microstructure
150 11 1ZS-6, Preparation of steel substrates before application of paints and related products — Test methods for metallic blast-cleaning abrasives — Part 6: Determination of foreign matter
151) 11125-7, Preparation of steel substrates before application of paints and related products — Test methods for metallic blast-cleaning abrasives — Part 7: Determination of moisture
3 Terms and definitions
For the purposes of ths document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www,iso.ore/obp IEC Electropedia: available at https://www.electropedia.orgj
high-carbon cast-steel shot
metallic blast-cleaning abrasive produced by a casting process in which molten high-carbon steel is formed into shot (13) by means of an atomization process
3.2
high-carbon cast-steel grit
metallic blast-cleaning abrasive obtained by crushing various hqh-corbon cast-steel shot (11) sIzes Into sharp-edged angular particles
3.3
shot
particles that are predominantly round, that have a length of less than twice the maximum particle width and that do not have edges, broken faces or other sharp surface detects
3.4
grit
particles that are predominantly angular, that have rractured faces and sharp edges and that are less than half round in shape
3.5
defect
fault or weakness in an abrasive which, if present at or above a given level, can be detrimental to the performance characteristics of the abrasive
Note Ito entry: See Tabl3.
3.5.1
void
smooth-surfaced Internal cavity considered undesirable when greater than 10 % of the cross-sectional area of a particle
3.5.2
shrinkage defect
internal cavity with a rough dcndritic surface or a moe of microporosity, considered undesirable when greater than 40% of the cross-sectional area of a particle
3.5.3
crack
linear discontinuity that has a length-to-width ratio of 3:1 or greater, that extends over more than 20 % of the diameter or shortest dimension of a particle and that is radial in direction
3.6
foreign matter
material or particles mixed with the abrasive which are not attached to the abrasive particles and which are nonmagnetic
4 Designation of abrasives
High-carbon cast-steel shot and grit shall be identified by “Abrasive ISO 11124 and the abbreviation “M/HCS” indicating metallic, high-carbon cast-steel abrasive. The symbol or shall follow to indicate the required particle shape of the shot or grit as purchased. The designation shall be completed by a 3-digit number denoting the grade, or nominal particle size, required. If alternative hardnesses of abrasive are available, the particular Vickers hardness (HV) range required shall be specified (see Example 2).
EXAMPLE I
Abrasive ISO 11124 M/HCS/S1441
denotes an abrasive of the metallic, high-carbon cast-steel type. conforming to the requirements oIthis document,
of particle shape shot and grade 140 (i.e. nominal particle size 1.40 mm)
EXAMPLE 2
Abrasive ISO 11124 M/HCS/G 140/570-7IOHV
denotes an abrasive of the metallic, high-carbon cast-steel type, conforming to the requirements of this document, of particle shape grit and grade 140 (Ic. noniin.il particle size 1.40 mm). and with a hardness range of 570 HVto 710 HV.
This full product designation shall be quoted on all orders.
NOTE 1 Grade requirements and codes are peclf,ed in Tables 1 and 2. The grade code Is based on a 3-digit number indicating the nominal size of the particle size range, for each grade, expressed in millimetres x 100.
NOTE 2 Annex A provides guidance on approximately equivalent grades and codings in other commonly referenced national standards for cast-metal abrasives.
5 Sampling
Sampling procedures shall be as specified in ISO 11125-1.
6 Requirements for high-carbon cast-steel shot and grit abrasives
The requirements for high-carbon cast-steel shot and grit abrasives shall be as specified in Table 3.