ASTM A 20 A20M _冶金/矿山/地质_工程科技_专业资料。Designation: A20/ A20M? 13 Standard Speci?cation for General Requirements. ASTM A20/A20M Standard Specification for General Requirements for Steel Plates for Pressure Vessels. standard by ASTM International. ASTM A20/A20M: Standard Specification for General Requirements for Steel Plates for Pressure Vessels.
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Normalizing or quenching and tempering the product will reduce the degree of variation. For plates produced from coil, the processor shall furnish the required certi? Unless otherwise agreed upon with the purchaser, it is the responsibility of the manufacturer to select suitable process procedures.
The provisions of E By agreement between the purchaser and the supplier, the heat analysis limit for titanium is permitted to be increased to a value not higher than 0.
It is, therefore, incumbent on designers and engineers to use sound engineering judgement when using tension test results shown on mill test reports. Charpy V-notch tests shall be conducted on the strain aged specimens. Thickness over 2 in.
Q20 weld metals shall be quali? NOTE 6—Plates shall be in a horizontal position on a? C Full size 10 by 10 mm specimens. Testing temperature as speci? Flatness Tolerances for Speci? Stainless Chromium Steel-Clad Plate. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
NOTE 4—The variations given in this table apply to plates that have a minimum speci? The year-date of the speci?
The required chemical analysis as well as the carbon equivalent shall be reported. Historical Version s – view previous versions of standard.
Regardless of the different types of systems employed during or following the rolling operations, it is common for the steel to be reeled into the coiler at temperatures in the stress-relieving range. Lateral expansion and percent shear shall aa20m be reported when speci?
Materials and Manufacture 5. The acceptability of defects revealed by this examination shall be judged in accordance with the requirements for quality in 9. Sampling and methods for chemical analysis are discussed. When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. If plates are furnished by the manufacturer or processor in accordance with When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.
Sharp corners on edges and on punched or gas cut holes should be removed by chamfering or grinding to a radius. Individual reprints single a220m multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Acceptable on Edges Cut in Fabrication Depth 5? Mandatory conformance of qstm additional tests with the speci?
Current edition approved Oct. Combining values from the two systems may result in non-conformance with the standard.
This is not considered to be a fault of the steel, but is rather a function of the induced cold work or heat affected zone. Your comments will ast careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE 1—Such austenitic grain size numbers may be achieved with lower contents of austenitic grain re? Size, 10 by 7. Vacuum Carbon-Deoxidized Steel S These radii apply when the precautions listed in X4. NOTE 2— Plates with universal rolled edges will be gas cut to length only.
Reduction of Area Measurement S For plates produced from coil, see also 3. It is well known and documented that tensile properties vary within a plate-as-rolled or individual piece of steel as a function of chemical composition, processing, testing procedure, and other factors.
ASTM A 20 A20M _百度文库
If more than one organization is involved in the hot rolling and processing operations, the organization that did the hot a20mm is termed the manufacturer and the organization that does one or more processing operations is termed a processor. A plot of the data is not required. Class IV is Killed with a speci? Class I is Other Than Killed with a speci? The effect is not so pronounced in thicker plates.
Standard Specification for General Requirements for Steel Plates for Pressure Vessels
The purchaser should, therefore, be aware that testing of one plate-as-rolled does not provide assurance that all locations within a plate-as-rolled will be identical in toughness with the location tested. To 2, excl 2 to 4, excl 4 to 6, excl 6 to 8, excl 8 to 15, incl Variations Over for All Speci? W20m plates produced from coil, all injurious surface imperfections shall be removed by the processor.