ASTM-B865:2020 pdf free download – Standard Specification for Precipitation Hardening Nickel-Copper-Aluminum Alloy Bar, Rod, Wire, Forgings, and Forging Stock.
7.6.2 The permissible variations in straightness of hot- worked, cold-worked, rough-turned, and machined rod and bar as determined by the departure from straightness shall be as specified in Table 10.
7.6.2.1 In determining straightness in the standard 42-in. (1.07-mm) distance between supports or, when specified, in determining straightness in length not in excess of those shown in Table 3, the rod shall be placed on a precision table equipped with ball bearing rollers and a micrometer or dial indicator. The rod then shall he rotated slowly against the indicator, and the deviation from straightness in any portion of the rod between the supports shall not exceed the permissible variations prescribed in Table 10. The deviation from straightness (throw in one revolution) is defined as the dillerence between the maximum and minimum readings of the dial indicator in one complete revolution of the rod.
7.7 Forging—Dimensions and tolerances shall be as specified on the order, sketch, or drawing.
7.8 Forging Stock—Dimensions and tolerances shall be as agreed upon between the purchaser and the manufacturer.
8. Workmanship, Finish, and Appearance
8. I The material shall be uniform in quality and condition. smooth, commercially straight or flat, and free of injunous imperfect ions.
9. Sampling
9. 1 Lot—Defiuiiiioii.
9. 1 .1 A lot for chemical analysis shall consist of one heat.
9. 1.2 A lot for mechanical properties testing shall consist of all material from the same heat, same nominal cross-sectional or forging size, and condition.
9.1.2.1 A lot for forging stock shall consist of one heat.
9.1.2.2 Where material cannot be identified by heat, a lot shall consist of not more than 500 lb (227 kg) of material in the same size and condition.
9.2 Test Material Selection:
9.2. 1 Chemical AnaIvsis—Representative samples from each lot shall be taken during pouring or subsequent processing.
TABLE 10 Permissible Variations in Straightness of Rod .
9.2.1 .1 Product (check) analysis shall be wholly the responsibility of the purchaser.
9.2.2 Mechanical Prnperiies—Samples of the material to provide test specimens for mechanical properties shall be taken from such locations in each lot as to be representative of that
9.2.3 Unaged Maierial—For material ordered in the unaged conditions one test specimen shall be taken from each lot as delined in 9.1.2. The specimen shall be obtained from the actual material to be shipped or 1mm a forged test coupon when applicable. The specimen shall be aged. or annealed and aged. as required by either applicable Table 5 or Table 6. Tests need not be repeated when unaged material from the same heat can be identified with a lot that has been tested in the specified condition and found to meet the requirements of this specification.