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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This value shall be based upon the heat analysis. To 32, excl 32 to 84, excl 84 toexcl toexcl and over Variations Over Speci? Drop-Weight Test for Plates 0. Testing axtm as speci?
The minimum heat analysis and product analysis requirements for silicon do not apply to vacuum carbon-deoxidized steel. Class VI is Killed with a speci? The specimens for analysis shall be taken adjacent to or from a broken tension test specimen.
The acceptability of defects revealed by this examination shall be judged in accordance with the requirements for quality in 9. Length Toexcl Width over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over Permissible Variations over Speci?
Size, 10 by 6. For tests using specimens taken from such heat treated test coupons, the test results shall meet the requirements of the applicable product speci?
Interpolated values shall be rounded to the nearest whole number as prescribed in Practice E A number in parentheses indicates q20 year of last reapproval. NOTE 4—The tolerances given in this table apply to plates axtm have a minimum speci? Agreement shall be reached between the purchaser and the manufacturer or processor as to the number of plates to be tested and whether a maximum NDT temperature is mandatory or if the test results are for information only.
The hightemperature tests shall be made in a220 with the requirements of Practice E The survey data consists of test values obtained from six locations in addition to the locations speci? The specimens shall represent the plates in the?
C For thicknesses over 4 in. NOTE 3—When the longer dimension is under 36 in. When the larger dimension is from 36 to 72 in.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Permission rights to photocopy the standard may also be secured from the ASTM website www. Permissible Variations Over Speci? NOTE 7—Plates shall be in horizontal position on a?
B In addition for each heat, based upon the heat analysis, the sum of asym and molybdenum shall not exceed 0. The results obtained using this second test specimen shall meet the requirements of the applicable product speci? 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.
For quenched and tempered plates, one impact test shall be made from each plate, as heat treated. Plate Nominal Thickness A200m, in.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. This exclusion does not apply to those plates with speci? The test report shall indicate that the steel was vacuum carbon-deoxidized.
Class III is Killed with a speci? NOTE 4—This table and these notes cover the variations for? One cubic metre of rolled steel is assumed to have a mass of kg, unless otherwise stated in the applicable product speci?
The purchaser shall be informed of the procedure followed in heat treating the specimens. C By agreement between the purchaser and the supplier, the heat analysis limit for vanadium is permitted to be increased to a value not higher than 0. Variations Over for All Speci? This is asfm considered to be a fault of the steel, but is rather a function of the induced cold work or heat affected zone. Restrictive Plate Flatness S NOTE 5—Waviness tolerances for rectangular plates, universal mill plates, and circular and sketch plates do not apply.
If bend lines are parallel to the direction of?