ASTM B249 PDF

ASTM B/BM Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and. Find the most up-to-date version of ASTM B at Engineering ASTM B/BM Standard Specification for General Requirements for Wrought Copper and Copper-Alloy Rod, Bar, Shapes and Forgings. This.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change ashm the last revision or reapproval. This standard has b294 approved for use by agencies of the Department of Defense. Within the text the SI values are given in brackets. The values stated in each system of units are not exact equivalents; each system is independent of b429 other. Combining values from the two systems may result in nonconformance with the speci?

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Current edition approved Oct. Originally published as B — 51 T. They asstm subject to minimum length and maximum weight requirements.

Full length pieces are usually 10 or 12 ft [ or mm] and subject to established length tolerances. They are usually 10 or 12 ft [ or mm] and subject to established length tolerances.

Materials and Manufacture 4. NOTE 2—Because of the discontinuous nature of the processing of castings into wrought products, it is not always practical to identify speci?

Dimensions, Mass and Permissible Variations 6. NOTE 3—Blank spaces in the tolerance tables indicate either that the material generally is not available or that no tolerances are established.

Limits may be established and analysis required for unnamed elements by agreement between the manufacturer or supplier and the purchaser. Table 1—Tolerances for diameter or distance between parallel surfaces of cold-drawn rod applicable to Speci?

Table 2—Tolerances for diameter or distance between parallel surfaces of cold-drawn rod applicable to Speci? Table 3—Diameter tolerances for piston? Table 4—Tolerances for diameter or distance between parallel surfaces of as-extruded rod and bar applicable to Speci?

Cand B Table 5—Tolerances for diameter or distance between parallel surfaces of as-extruded rod and bar applicable to Speci? Tolerances, Plus and Minus,A in. Diameter or Distance Between Parallel Surfaces, in. Table 6—Diameter tolerances for hot-rolled round rod applicable to Speci? Table 7—Thickness tolerances for rectangular and square bar applicable to Speci? Table 8—Thickness tolerances for rectangular and square bar applicable to Speci?

Table 10—Width tolerances for rectangular bar applicable to Speci? Table 11—Width tolerances for rectangular bar applicable to Speci? Table 12—Diameter tolerances for hot-forged rod and bar applicable to Speci? Table 13—Length tolerances for full-length pieces applicable to Speci? Thickness Tolerances, Plus and Minus,A in. Over 8 to 12 [ to ] Incl 0.

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Over 2 to 4 Incl 0. Over 8 to 12 Incl 0. When tolerances are speci? Over 2 to 4 [50 to ] Incl 0. Table 14—Schedule of lengths speci?

Table 15—Schedule of lengths speci? To determine compliance with this tolerance, the lengths shall, in case of disagreement, be checked by the following method: NOTE 1—The length tolerances in this table are all plus; if all minus tolerances are desired, use the same values; v249 tolerances are desired plus and minus, halve the values given.

The tolerance on the radius shall be one fourth the thickness of the bar. Workmanship, Finish, and Appearance 7. The product shall be well cleaned and free from dirt. Alternatively, a lot shall be the product of one cast bar from a single melt charge, or one continuous casting run whose weight does not exceed 40 lbs [20 kg] that has been continuously processed and subject to inspection at one time. Should the lot consist of less than?

Local departure from straightness should be measured with a 1-ft [mm] straightedge and a feeler gage. To determine compliance with this paragraph, shafting shall, in case of disagreement, be checked by the following method: Measure the departure from straightness at each end and at the center by means of a dial gage mounted on a suitable movable block and set successively at the three points to be measured while rotating the shaft slowly and carefully to avoid vibration.

ASTM BASTM BM铜和铜合金棒材、型材及锻件_百度文库

The total range of the dial reading at a given point, divided by two, gives the departure from straightness at that point. For hexagonal and octagonal rods cold-drawn to size, corner radii shall not exceed 1? The distance from corner to corner12 shall be the basis for acceptance or rejection. When so ordered, the edge contours described in 6.

Expressed to the nearest 1?

ASTM B249/B249M – 18a

Applicable to any longitudinal surface or wstm. The minimum weight of the composite sample shall be g. When samples are taken during the course of manufacture, sampling of the? The number of samples taken for the determination of composition shall be as follows: In the case of copper-beryllium alloy, two specimens shall be taken for each required test. One specimen from each piece shall be tested without further treatment, and the other specimen shall be tested after precipitation heat treatment.

Test results for all specimens shall conform to the product speci? Specimen Preparation NOTE 1—The arc shall not necessarily be tangent at Points A but shall be substantially symmetrical with the axis of the product, and the product shall be commercially free from sharp, rough, or projecting edges. The corners, A, will usually be sharp but shall not have rough or projecting edges. Number of Tests and Retests 9. The testing facility must be able to demonstrate that there is no statistically signi?

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Plastic deformation may work harden a material and tend to raise the resistivity, while heating tends to anneal the material with a consequent reduction in resistivity. The diameter or thickness of the specimen shall be at least 1? In rectangular specimens of reduced thickness, the outside or tension surface ast be an as fabricated surface. Above the yield strength the movement per minute of the testing machine head under load should not exceed 0.

If the pH value is not speci? When the test specimen has been machined, the retained original surface shall constitute the outer periphery of the bend that shall be made on a radius equal to that dimension of the machined radial to the bend. Samples of the rejected product shall be taken in accordance with the product speci?

Mill Test Report Packaging and Package Marking In which case, the nature of the facilities needed to satisfy the inspector representing the purchaser that the product is b2249 furnished in accordance with the product speci?

All tests and the inspection shall be conducted so as not to interfere unnecessarily with the asttm of the works.

Rejection and Rehearing Except as otherwise speci? The purchaser shall have the right to perform any of the inspections or tests set forth when such inspections and tests are deemed necessary to ensure that the material conforms to prescribed requirements.

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If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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