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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Sufficient full-size specimens were taken from each sample so that three longitudinal and three transverse specimens could be broken at three test temperatures de? NOTE 5—This table and notes cover the? If the purchaser wishes to have more con?
Maximum permissible camber, in. Each of the three retest specimens shall equal a2m0 exceed the speci? Interpolated values shall be rounded to the nearest whole number as prescribed in Practice E If, during decoiling, the amount of material decoiled is less than that required to reach the next standard test location, a test for quali?
Reduction of Area Measurement S The hightemperature tests shall be made in accordance with the requirements of Practice E A number in parentheses indicates the year of last reapproval. The testing procedures of this general requirements speci?
Restrictive Plate Flatness S Unless otherwise agreed upon with the purchaser, it a20, the responsibility of the manufacturer to select suitable process asym. The provisions of Combining values from the two systems may result in non-conformance with the standard.
To 14, excl 14 to 17, excl 17 to 19, excl 19 to 21, excl 21 to 24, excl 24 to 26, excl 26 to 28, excl 28 to 35, excl 35 to 50, excl 50 to 60, excl 60 to 65, excl 65 to 70, excl 70 to 80, excl 80 and over A02m Variations over Speci?
ASTM A 20 A20M _百度文库
The steel shall be made in an open-hearth, basic-oxygen, or electric-arc furnace process. Such requirements are provided for use if additional testing or additional restrictions are required by the purchaser, and apply only if specified individually in the purchase order. Class IV is Killed with a speci? Restricted Limits on Elements For each heat, based upon the heat analysis, the content shall not exceed 0.
In case of dissatisfaction with the results of the tests, the supplier shall have the option of making claim for a rehearing within that time. When the larger dimension is from to mm, inclusive, the permissible? For Charpy V-notch test, include test specimen orientation, testing temperature, and acceptance criteria.
Standard Specification for General Requirements for Steel Plates for Pressure Vessels
D By agreement between the purchaser and the supplier, the heat analysis limit for columbium is permitted to be increased to a value not higher that 0. NOTE 6—Plates shall be in a horizontal position on a? If the plate thickness is insufficient to obtain full-size specimens, the largest possible subsize specimens shall be used. Reduction of area shall be determined adtm on the 0. In addition, for elements that are listed in Table 1 but are not speci? Variations Over for All Speci?
The tensile properties will vary within the same plate-as-rolled or piece, be it as-rolled, control-rolled, or heat-treated.
NOTE 2—Thickness shall be measured 10 to 20 mm from the longitudinal edge. B Full size 10 by 10 mm astk. Heat treatment, strain aging, test temperature, and acceptance criteria shall be as agreed upon between the manufacturer or processor and the purchaser.
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. The specimens for testing shall be obtained as required for the room temperature tension tests speci?
It is informational only and not an official part astk the standard; the full text of the standard itself must be referred to for its use and application.
When the larger dimension is from 36 to 72 in. The coupon shall be heat treated in accordance with the applicable product speci? ICS Number Code This general requirements speci? ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. Thus, a range from 60 to 72 in.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Other tests may be performed by agreement between the manufacturer or processor and the purchaser. Accordingly, the following deductions shall be made from the base elongation requirements in 2 in.
Plate Nominal Thickness Range, in. This specification covers a group of common requirements that apply to rolled steel plates for pressure vessels. The coils subsequently cool to ambient temperature with outer and inner laps cooling more rapidly than central laps. One cubic metre of rolled steel is assumed to have a mass of kg, unless otherwise stated in the applicable product speci? Class III is Killed with a speci?