STANDARD SPECIFICATIONS FOR STEEL FORGINGS.* 1. Steel for forgings may be made by the open-hearth, cruci- Manufacture. ble or Bessemer process. 2. There will be four classes of steel forgings which shall con- Chemical form to the following limits in chemical composition. Properties. 3. The minimum physical qualities required of the different Physical sized forgings of each class shall be as follows Properties. *Adopted by letter-ballot of the Society on September 1, 1905. Pounds per square inch. Per cent. CARBON STEEL, OIL TEMPERED. For solid forgings of rectangular sections not ness LOCOMOTIVE FORGINGS. Bending Test. For solid forgings of rectangular sections not ness For solid forgings of rectangular sections_not ness · 90,000 60,000 22 50 85,000 55,000 24 45 4. A specimen one inch by one-half inch (1" x 1") shall bend cold 180° without fracture on outside of bent portion, as follows: Around a diameter of 1", for forgings of soft steel, Around a diameter of 1", for forgings of carbon steel not annealed, Around a diameter of 11", for forgings of carbon steel annealed, if 20" in diameter or over, Around a diameter of 1", for forgings of carbon steel annealed, if under 20" diameter, Around a diameter of 1" for forgings of carbon steel oil-tempered, Around a diameter of 1", for forgings of nickel steel annealed, Around a diameter of 1", for forg ngs of nickel steel oil-tempered. ! For locomotive forgings no bending test will be required. and Methods of 5. The standard turned test specimen, one-half inch (") Test Pieces diameter and two inch (2") gauged length, shall be used to deter- Testing. mine the physical properties specified in paragraph No. 3. It is shown in the following sketch. 6. The number and location of test specimens to be taken from a melt, blow, or a forging shall depend upon its character and importance and must therefore be regulated by individual cases. The test specimens shall be cut cold from the forging or full-sized prolongation of same parallel to the axis of the forging and halfway between the center and outside, the specimens to be longitudinal, i. e., the length of the specimen to correspond with the direction in which the metal is most drawn out or worked. When forgings have large ends or collars, the test specimens shall be taken from a prolongation of the same diameter or section as that of the forging back of the large end or collar. In the case of hollow shafting, either forged or bored, the specimen shall be taken within the finished section prolonged, half-way between the inner and outer surface of the wall of the forging. Number and site Specimens. Location of Ten 7. The specimen for bending test one inch by one-half inch Test Specimen (1" x 1") shall be cut as specified in paragraph No. 6. The bend- for Bending. ing test may be made by pressure or by blows. 8. The yield point specified in paragraph No. 3 shall be deter- Yield Point. mined by the careful observation of the drop of the beam, or halt in the gauge of the testing machine. 9. The elastic limit specified in paragraph No. 3 shall be deter- Elastc Limit. Sample for mined by means of an extensometer, which is to be attached to the test specimen in such manner as to show the change in rate of extension under uniform rate of loading, and will be taken at that point where the proportionality changes. 10. Turnings from the tensile specimen or drillings from the bending specimen or drillings from the small test ingot, if preferred by the inspector, shall be used to determine whether or not the steel is within the limits in chemical composition specified in paragraph No. 2. FINISH. 11. Forgings shall be free from cracks, flaws, seams or other injurious imperfections, and shall conform to dimensions shown on drawings furnished by the purchaser, and be made and finished in a workmanlike manner. INSPECTION. 12. The inspector representing the purchaser shall have all reasonable facilities afforded to him by the manufacturer to satisfy him that the finished material is furnished in accordance with these specifications. All tests and inspections shall be made at the place of manufacture, prior to shipment. REPORT OF COMMITTEE B ON STANDARD FINISHED CASTINGS. At the last Annual Meeting Committee B submitted proposed Standard Specifications for the following products: 1. Foundry Pig Iron. 2. Cast Iron Pipe and Special Castings. 3. Locomotive Cylinders. 4. Cast Iron Car Wheels. At that meeting it was decided to refer the specifications for Foundry Pig Iron, Cast Iron Pipe and Special Castings, Locomotive Cylinders and Malleable Castings to letter-ballot of the Society, in the original form as submitted by the Committee, or with slight amendments. The letter-ballot on these specifications resulted favorably and they are accordingly recognized among the Standard Specifications of the Society. The proposed Standard Specifications for Cast Iron Car Wheels and Gray Iron Castings were discussed and referred back to the Committee. These specifications are herewith submitted for such action as the Society may see fit to take. The specifications for Cast Iron Car Wheels embody certain modifications concerning which Dr. Charles B. Dudley, Chairman of the sub-committee, charged with their preparation, writes as follows: "In connection with the proposed Standard Specifications for Cast Iron Car Wheels in their revised form as herewith submitted, it may be said that there were three items in these specifications as presented last year, which apparently needed further investigation. One was the question of weights, another the question of the drop, and a third, was the method of stating the variation in weight allowable. The specifications as submitted to you embody the criticisms that were made. The weights are made round figures, and the variation is stated to be two per cent. either way. Some changes have been made in the height of drop in accordance with a series of experiments made during the past year on wheels of the weights given in the specifications, and the weight |