SPECIFICATIONS FOR BILLET-STEEL REINFORCEMENT BARS. 507 



(b) Three bend and three flattening tests shall be made from each size in each lot of rivets 

 for inspection, each of which shall conform to the requirements specified: 



II. WORKMANSHIP AND FINISH. 



20. Workmanship. Rivets shall be true to form, concentric, and shall be made in a work- 

 manlike m.umri. 



ji. Finish. The finished rivets shall be free from injurious defects. 



III. INSPECTION AND REJECTION. 



22. Inspection. The inspector representing the purchaser shall have free entry, at all times 

 while work on the contract of the purchaser is being performed, to all parts of the manufacturer's 

 works which concern the manufacture of the rivets ordered. The manufacturer shall afford the 

 in-ipivtor, five of cost, all reasonable facilities to satisfy him that the rivets are being furnished in 



lance with these specifications. All tests and inspection shall be made at the place of manu- 

 facture prior to shipment, unless otherwise specified, and shall be so conducted as not to interfere 

 unnecessarily with the operation of the works. 



23. Rejection. Rivets which show injurious defects subsequent to their acceptance at the 

 manufacturer's works will be rejected, and the manufacturer shall be notified. 



STANDARD SPECIFICATIONS FOR BILLET-STEEL REINFORCEMENT BARS* 



OF THE 



AMERICAN SOCIETY FOR TESTING MATERIALS. 

 ADOPTED AUGUST 25, 1913. 



1. Classes, (a) These specifications cover three classes of billet-steel concrete reinforcement 

 bars, namely: plain, deformed, and cold-twisted. 



(b) Plain and deformed bars are of two grades, namely: structural steel and hard. 



2. Basis of Purchase, (o) The hard grade will be used only when specified. 



(b) If desired, cold-twisted bars may be purchased on the basis of tests of the hot-rolled bars 

 before twisting, in which case such tests shall govern and shall conform to the requirements speci- 

 fied for plain bars of structural steel grade. 



I. MANUFACTURE. 



3. Process, (a) The steel may be made by the Bessemer or the open-hearth process. 

 (b) The bars shall be rolled from new billets. No rerolled material will be accepted. 



4. Cold-twisted Bars. Cold-twisted bars shall be twisted cold With one complete twist in a 

 length not over 12 times the thickness of the bar. 



II. CHEMICAL PROPERTIES AND TESTS. 



5. Chemical Composition. The steel shall conform to the following requirements as to 

 chemical composition: 



t>u~o t,^. ,,/ Bessemer not over o.io per cent 



Phosphorus i open-hearth " " 0.05 " 



6. Ladle Analyses. An analysis to determine the percentage of carbon, manganese, phos- 

 phorus and sulphur, shall be made by the manufacturer from a test ingot taken during the pouring 

 of each melt, a copy of which shall be given to the purchaser or his representative. This analysis 

 shall conform to the requirements specified in Section 5. 



7. Check Analyses. Analyses may be made by the purchaser from finished bars representing 

 each melt of open-hearth steel, and each melt, or lot of ten tons, of Bessemer steel, in which case an 

 excess of 25 per cent above the requirements specified in Section 5 shall be allowed. 



III. PHYSICAL PROPERTIES AND TESTS. 



8. Tension Tests, (a) The bars shall conform to the following requirements as to tensile 

 properties: 



* For the American Railway Engineering Association specifications for steel reinforcement, 

 see Chapter VI, p. 272. 



