原帖由 chenjianming327 于 2007-11-9 09:24 發(fā)表 ![]()
* A3 q* a1 ]9 n& ~應該感 生生世世 很對的啊 , \3 o. n; I. r6 N, L+ ^
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ASTM A513-07 Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing
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1.1 This specification covers electric-resistance-welded carbon and alloy steel tubing for use as mechanical tubing. & W) ]2 L, \, C( x3 ~: d; p. ~
1.2 This specification covers mechanical tubing made from hot- or cold-rolled steel.
! \ i( g i5 }, ~* {1.3 This specification covers round, square, rectangular, and special shape tubing. Type | Size Range(Round Tubing) | Electric-Resistance-Welded Tubing from Hot-Rolled Steel | outside diameter from 1/2 to 15 in. (19.0 to 381.0 mm) | | wall from 0.065 to 0.650 in. (1.65 to 16.50 mm) | Electric-Resistance-Welded Tubing from Cold-Rolled Steel | outside diameter from 3/8 to 12 in. (9.92 to 304.8 mm) | | wall from 0.022 to 0.134 in. (0.71 to 3.40 mm) |
X( E# v% X! i0 ^1.4 Optional supplementary requirements are provided and when desired, shall be so stated in the order.
6 o7 f' _+ y! ~; N7 j. L1.5 The values stated in inch-pound units are to be regarded as the standard. |