510 



ENGINEERING MATERIALS. 



CHAP. XV. 



EXPLANATORY NOTE: d = the diameter of pin about which the specimen is bent; 

 t = the thickness or diameter of the specimen. 



7. Test Specimens, (a) Tension and bend test specimens for plain and deformed bars shall 

 be taken from the finished bars, and shall be of the full thickness or diameter of bars as rolled; 

 except that the specimens for deformed bars may be machined for a length of at least 9 in., if 

 deemed necessary by the manufacturer to obtain uniform cross-section. 



(b) Tension and bend test specimens for hot-twisted bars shall be taken from the finished 

 bars, without further treatment. 



8. Number of Tests, (a) One tension and one bend test shall be made from each lot of ten 

 tons or less of each size of bar rolled from rails varying not more than 10 Ib. per yd. in nominal 

 weight. 



(b) If any test specimen shows defective machining or develops flaws, or if a tension test 

 specimen breaks outside the middle third of the gage length, it may be discarded and another 

 specimen substituted. 



III. PERMISSIBLE VARIATIONS IN WEIGHT. 



9. Permissible Variations. The weight of any lot of bars shall not vary more than 5 per cent 

 from the theoretical weight of that lot. 



IV. FINISH. 



10. Finish. The finished bars shall be free from injurious defects and shall have a workman- 

 like finish. 



V. INSPECTION AND REJECTION. 



11. 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 bars ordered. The manufacturer shall afford the 

 inspector, free of cost, all reasonable facilities to satisfy him that the bars are being furnished in 

 accordance 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. 



12. Rejection. Bars 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 STEEL CASTINGS 



OF THE 



AMERICAN SOCIETY FOR TESTING MATERIALS 

 ADOPTED AUGUST 25, 1913. 



1. Classes. These specifications cover two classes of castings, namely: 

 Class A, ordinary castings for which no physical requirements are specified; 



Class B, castings for which physical requirements are specified. These are of three grades: 

 hard, medium, and soft. 



2. Patterns, (a) Patterns shall be made so that sufficient finish is allowed to provide for all 

 variations in shrinkage. 



(6) Patterns shall be painted three colors to represent metal, cores, and finished surfaces. 

 It is recommended that core prints shall be painted black and finished surfaces red. 



3. Basis of Purchase. The purchaser shall indicate his intention to substitute the test to 

 destruction specified in Section 1 1 for the tension and bend tests, and shall designate the patterns 

 from which castings for this test shall be made. 



