492 ENGINEERING MATERIALS. CHAP. XV. 



8. Test Specimens, (a) Tension and bend test specimens shall be of the full section of 

 material as rolled, if possible. Otherwise, the specimens shall be machined from the material 

 as rotted; the axis of the specimen shall be located at any point one-half the distance from the 

 center to the surface of round bars, or from the center to the edge of flat bars, and shall be parallel 

 to the axis of the bar. 



(b) Etch test specimens shall be of the full section of material as rolled. 



9. Number of Tests, (a) All bars of one size shall be piled separately. One bar from each 

 100 or fraction thereof will be selected at random and tested as specified. 



(b) If any test specimen from the bar originally selected to represent a lot of material, contains 

 surface defects not visible before testing but visible after testing, or if a tension test specimen 

 breaks outside the middle third of the gage length, one retest from a different bar will be allowed. 



III. PERMISSIBLE VARIATIONS IN GAGE. 



10. Permissible Variations, (a) Round bars shall conform to the standard limit gages adopted 

 by the Master Car Builders' Association in 1883. 



(b) The width or thickness of flat bars shall not vary more than 2 per cent from that specified. 



IV. FINISH. 



11. Finish. The bars shall be smoothly rolled and free from slivers, depressions, seams, 

 crop ends, and evidences of being burnt. 



V. INSPECTION AND REJECTION. 



12. Inspection, (a) 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 manu- 

 facturer's works which concern the manufacture of the material ordered. The manufacturer 

 shall afford the inspector, free of cost, all reasonable facilities to satisfy him that the material is 

 being furnished in accordance with these specifications. Tests and inspection at the place of 

 manufacture shall be made prior to shipment. 



(6) The purchaser may make the tests to govern the acceptance or rejection of material in 

 his own laboratory or elsewhere. Such tests, however, shall be made at the expense of the purchaser. 



13. Rejection. All bars of one size will be rejected if the test specimens representing that 

 size do not conform to the requirements specified. 



STANDARD SPECIFICATIONS FOR WROUGHT-IRON PLATES 



OF THE 



AMERICAN SOCIETY FOR TESTING MATERIALS. 

 ADOPTED AUGUST 25, 1913. 



1. Classes. These specifications cover two classes of wrought-iron plates, namely: 



Class A , as defined in Section 2 (b) ; 

 Class B, as defined in Section 2 (c). 



I. MANUFACTURE. 



2. Process, (a) All plates shall be rolled from piles entirely free from any admixture of steel. 



(b) Piles for Class A plates shall be made from puddle bars made wholly from pig iron and 

 such scrap as emanates from rolling the plates. 



(c) Piles for Class B plates shall be made from puddle bars made wholly from pig iron or 

 from a mixture of pig iron and cast-iron scrap, together with wrought-iron scrap. 



II. PHYSICAL PROPERTIES AND TESTS. 



,ile 



5. Tension Tests. The plates shall conform to the following minimum requirements as to 

 tensile properties: 



