Association of American Railroads

Material Specifications M-122-37 to m-202-38

1. M-122-37 Commercial Bar Steels- Hot Rolled and Cold Finished.

2. M-123-40 Specifications for Heat Treated Multiple Wear Wrought Carbon Steel Wheels.

3. M-151-29 High Chrome Steel Rivet Material and Rivets for Acid Tank Cars.

4. M-153-29 High Chrome Steel Tank Plates for Nitric Acid Tank Cars.

Cast Steel

5.M-201-36 Steel Castings.

6. M-202-38 Truck Bolsters.

7. M-203-38: Truck Side Frames, Cast Steel.

8. M-204-39:  For Purchase and Acceptance of A. A. R. Standard “E” Couplers, Knuckles, Locks, and other Parts.