| GENERAL CHARACTERISTICS ITEM DESCRIPTION | INSIDE DIAMETER OF RING IS 71.538 INCHES; SEE DRAWING FOR FABRICATION DETAILS |
| PART NAME ASSIGNED BY CONTROLLING AGENCY | ARMOR, TURRET RING (RIGHT FORWARD) |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-13623 MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | STEEL |
| SPECIAL FEATURES | ARMOR IS FORGED FROM MIL-S-13623 EXCEPT CHEMICAL COMPOSITION SHALL MEET AISI 8630 OR AISI 4340 EXCEPT CARBON CONTENT TO BE 0.28 TO 0.33 PERCENT OR CHEMICAL COMPOSITION SHALL MEET AMS6427; MATERIAL SHALL MEET CHIRPY IMPACT REQUIREMENTS OF MIL-S-13823 AFTER FORGING AND HEAT TREATMENT; QUENCH AND TEMPER TO 269 THRU 311 HB AFTER FORGING; OPTIONAL MATERIAL IS STEEL, MIL-A-12560, CLASS 1 |
| SPECIAL MARKINGS | USING NON-ACID BASE BLACK INK, TYPE 1, SPEC A-A-208, INK STAMP OR STENCIL IDENTIFICATION MARKING IN 0.12 TO 0.31 INCH HIGH CHARACTERS PER MIL-STD-130 |