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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The test report shall indicate that the steel was vacuum carbon-deoxidized.

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Thickness over 2 in. ICS Number Code Size, 10 by 5 mm [J] [27] [24] [20] [16] [14] [11] [11] [8] [8] [7] [5] 13? This specification covers a group of common requirements that apply to aztm steel plates for pressure vessels.

Flatness Tolerances for Speci? The acceptability of defects revealed by this examination shall be judged in accordance with the requirements for quality in 9. Two tension test coupons shall be taken from each quenched and tempered plate, as heat treated.

The axis of the test specimen shall be located midway between the center of thickness and the top or bottom surface of the plate. For drop-weight test, give testing temperature4. Users of this standard are expressly advised that determination of the a20k of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

C For thicknesses over 4 in.

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.

For quenched and tempered plates, a2m two tension test coupons shall be taken from opposite ends of the plate.

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Variations Over for All Speci? Flatness Tolerance from Tables A2. To qualify any plate to a particular product speci? In general, such temperatures are higher as the steel thickness increases.

Restrictive Plate Flatness S These radii apply when the precautions listed in X4. Class VI is Killed with a speci?

Standard Specification for General Requirements for Steel Plates for Pressure Vessels

If plates are furnished by the manufacturer or processor in accordance x20m Your comments are invited aetm for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The testing procedures of this general requirements speci? If, during decoiling, the amount of material decoiled is less than that required to reach the next standard test location, a test for quali? See Ordering Information in Speci? Variations from a Flat Surface for Speci?

If more than one organization is involved in the hot rolling and processing operations, the organization that did the hot rolling is termed the manufacturer and the organization that does one or more processing operations is termed a processor. All mechanical-property tests shall be repeated and the plate surface shall w20 reexamined for surface defects when it is resubmitted for inspection.

NOTE 3—When the longer dimension is under 36 in.

NOTE 2—Plates with universal asm edges will be gas cut to length only. For tests using specimens taken from such heat treated test coupons, the test results shall meet the requirements of the applicable product speci? NOTE 2—Any stress relief of test specimens intended to simulate post-weld heat treatment is not included in the above heat treatment.

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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 asgmexcl and over over 8 to 60, excl 60 to 84, excl 84 toexcl and over over 8 to 60, excl 60 to 84, w20 84 toexcl and aztm Permissible Variations over Speci?

The tensile properties will vary within the same plate-as-rolled or piece, be it as-rolled, control-rolled, or heat-treated.

Additional Tension Test S4. Flatness Tolerance from Tables A1. Such plates shall have been quali?

To 2, excl 2 to 4, excl 4 to 6, excl 6 to 8, excl 8 to 15, incl A2 Over for All Speci? All tests except product analysis and inspection shall be made at the place of manufacture prior to shipment, unless otherwise speci?

Higher strength steels require awtm die openings. The percent shear fracture appearance shall also be recorded if speci? The test specimens shall conform to the requirements for either the 11? Class I is Other Than Killed with a speci? NOTE 4—This table and these notes cover the variations for? For transverse tests, the available minimum temperature may be somewhat higher. Plate Nominal Thickness Range, in.

The year-date of the speci?