ASTM-A540/A540M:15(R2021) pdf free download – Standard Specification for Alloy-Steel Bolting for Special Applications

02-22-2022 comment

ASTM-A540/A540M:15(R2021) pdf free download – Standard Specification for Alloy-Steel Bolting for Special Applications.
15.1.1 When production pieces are not of sufficient length to permit removal of test coupons in accordance with 15.1, the mid-length of the specimens shall he at the mid-length of the production pieces selected for destruction to provide test coupons of the bolting material. The production pieces selected for test shall be identical with respect to the quenched contour and size except for length which shall equal or exceed the length of the represented production pieces.
15.2 Tension and impact specimens from bolting components with cross sections of 1 ½ in. [38 mmj or less shall be taken so that their longitudinal axis is on a line representing the center of the diameter or thickness.
15.3 Tension test specimens from bolting components with cross sections exceeding 1 ½ in. 138 mm] shall be taken so that their longitudinal axis is midway between mid-thickness and surface.
15.4 Impact specimens from bolting components with cross sections exceeding 1 ‘/2 in. [38 mm] shall be taken so that their longitudinal axis is midway between mid-thickness and surface or 1 in. [25 mml below the surface plus the machining allowance per side, whichever is less.
16. Certification
16.1 When requested in the purchaser’s order, a lest report shall be furnished to the purchaser. In addition to the requirements of Specification A962/A962M the report shall include any other tests which may be specified in writing by the Purchaser.
17. Product Marking
17.1 Bars under 2 in. 150 mm] in diameter shall be bundled and tagged with the specification, grade symbol. and mill heat number. The specification number marked on the tag need not include specification year (late and revision number.
17.2 Bars 2 in. [50 mm] and over in diameter and all seamless tubes and bored bars shall be die-stamped with the mill heat number and grade symbol on one surface.
17.3 Each hollow forging shall be (lie-stamped with the heat number or heat symbol code and grade symbol.
17.4 See Specification A962/A962M for marking bolting components. Use the grade symbol shown in Table 1.
18. Keywords
18. 1 bolts—steel; chromium-molybdenum alloy steel; chromium-molybdenum-vanadium alloy steel; chromium
nickel-molybdenum-vanadium alloy steel; bolting
components—steel; nickel-chromium-molybdenum alloy steel; nuclear applications; nuts—steel; steel bars—alloy; steel bolting material
Si. Product Analysis
S I. I Product analysis shall he made on each bar, seamless tube, bored bar, or the parent bar from which forged hollows are made. Individual pieces failing to conform to Table 1 shall be rejected.
S2. Macroetch Test
S2. 1 The material shall be macroetch tested and shall meet the quality and cleanliness requirements as specified by the purchaser. The macroetch examination may be made on representative billets from which the material will be produced or it may be made on samples cut from the ends of the bars, seamless tubes, bored bars, or forged hollows. The samples shall be prepared in accordance with the procedure described in Method E381.
Nar S2.l—The quality and cleanliness may he specified by the purchaser as equal to or better than that indicated by a designated letter and plate number of Military Standard—430 (latest revision).
S3. Ultrasonic Test
S3.l Each length shall he ultrasonically inspected in a manner agreeable to the purchaser and supplier.
S4. Demonstration of Capability
S4. 1 When annealed bolting material is ordered to 6. 1, a sample piece in length at least 3 x diameter D of a representative bar shall be heat treated in accordance with 6.2 and 6.3. Mechanical test samples taken as required by Section 15 shall meet the requirements of 8.2 and 10.2.

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