ASME B107.54:2001 pdf download

ASME B107.54:2001 pdf download HEAVY STRIKING TOOLS: SAFETY REQUIREMENTS
4.2.2 Heads shall be free of manufacturing and material defects such as seams, laps, pipes, and cold shuts that would jeopardize sound construction. They shall conform to the requirements for mechanical proper- ties specified in para. 4.3 and shall withstand the striking test specified in para. 4.4.3.
4.2.3 Handles shall be made of any suitable material that will withstand the tests specified in paras.
4.4.3 and 4.4.4.
4.3 Mechanical Properties
4.3.1 All striking faces, except for those of wood- chopper’s mauls (see para. 4.3.2), shall be hardened and tempered to 45 HRC to 60 HRC or equivalent. The steel directly behind the striking face (poll) shall be a toughened supporting core that gradually decreases in hardness.
4.3.2 The striking faces of woodchopper’s mauls shall be hardened and tempered to 44 HRC to 55 HRC or equivalent. The steel (poll) directly behind the striking face shall be a toughened supporting core that gradually decreases in hardness. The blades shall be hardened and tempered to 45 HRC to 60 HRC or equivalent for a minimum distance of 0.75 in. (19.0 mm) back from the cutting edge. 4.3.3 The peens of blacksmith’s cross peen sledges, spalling hammers, and stone sledges shall be hardened and tempered to a hardness of 45 HRC to 60 HRC or equivalent for a minimum distance of 0.50 in. (12.7 mm) back from the fullering surface or scoring edge.
4.3.4 Striking faces shall not sink, mushroom, chip, crack, or spall when subjected to the striking test specified in para. 4.4.3 (see para. 4.4.1).
4.3.5 Handles shall not loosen or separate from the head, crack, or break when subjected to the tests specified in paras. 4.4.3 and 4.4.4.
4.4 Tests Many tests required herein are inherently hazardous and adequate safeguards for personnel and property shall be employed in conducting such tests.
4.4.1 General. Heavy striking tools shall be capable of meeting tests specified in paras.
4.4.2 through
4.4.4. Separate (new) hammers shall be used for each test. Failure to meet the requirements of any one of the tests indicates that the hammers are not in compliance with this Standard.
4.4.2 Hardness Determination Test. Hardness determinations with respect to striking faces, peens, and blades shall be made on a fixtured tool or on a mounted or unmounted specimen that has been cut from the tool using the wet abrasive or other equivalent method. Any hardness test that utilizes equipment and methods equivalent to Rockwell hardness determination as specified in ASTM E 18 will be acceptable.
4.4.3 Striking and Tensile Force Test. Sample hammers shall be subjected to the striking test as specified in paras. (a) or (b), depending on the handle length. Following the striking test, assemblies consisting of two or more separate parts (head and handle) shall not loosen or separate when subjected to a static tensile force of 1,000 lbf (4 448 N). (a) For tools having overall handle lengths of less than 24 in. (61 cm), the sample tool shall receive 20 full swinging blows by a person of average build, 160 lb to 180 lb (73 kg to 82 kg), or the mechanical equivalent, commensurate with the end use and weight of the tool, against the smooth, flat or slightly convex surface of a rigidly supported steel object with a minimum diameter of 3.0 in. (76 mm) and a minimum length of 2.0 in. (51 mm), the hardness of which shall be equivalent to a hardness of 92 HRB to 105 HRB. (b) For tools having overall handle lengths of 24 in. (61 cm) or greater, the sample tool shall receive 100 full swinging blows by a person of average build, 160 lb to 180 lb (73 kg to 82 kg), or the mechanical equivalent, commensurate with the end use and weight of the tool, on a steel die block, the hardness of which shall be equivalent to a hardness of 92 HRB to 105 HRB. The test block shall be 10.0 in. (254 mm) square or larger, with a thickness of at least 8.0 in. (203 mm).