| SAE | SAE AMS6294 | Steel Bars and Forgings and Forging Stock, Carburizing, Aircraft Quality 1.8Ni - 0.25Mo (0.17 - 0.22C) (4620) |  | 
              
              
                | SAE | SAE AMS6292 | Steel Bars and Forgings and Forging Stock, Carburizing, Aircraft Quality, 1.8Ni - 0.25Mo - (0.15 - 0.20C), (SAE 4617) |  | 
              
              
                | SAE | SAE AMS6299 | Steel Bars, Forgings, and Mechanical Tubing and Forging Stock, Carburizing, Aircraft Quality, 0.50Cr - 1.8Ni - 0.25Mo - (0.17 - 0.23C), (SAE 4320H) |  | 
              
              
                | SAE | SAE AMS6428 | Steel, Bars, Forgings, Mechanical Tubing and Forging Stock, Aircraft Quality, 0.78Cr - 1.8Ni - 0.35Mo - 0.20V (0.32 - 0.38C) (4335 Mod) |  | 
              
              
                | SAE | SAE AMS6448 | Steel, Bars, Forgings, Mechanical Tubing, and Forging Stock, Aircraft Quality, 0.95Cr - 0.22V (0.48 - 0.53C) (6150) |  | 
              
              
                | SAE | SAE AMS6427 | Steel Bars, Forgings, Mechanical Tubing, and Forging Stock, Aircraft Quality, 0.88Cr - 1.8Ni - 0.42Mo - 0.08V (0.28 - 0.33C) (4330 Mod) |  | 
              
              
                | SAE | SAE AMS6324 | Steel Bars, Forgings, Mechanical Tubing, and Forging Stock, Aircraft-Quality, 0.65Cr - 0.70Ni - 0.25Mo (0.38 - 0.43C) (8740 Modified) |  | 
              
              
                | SAE | SAE AMS6270 | Steel, Bars, Forgings, and Mechanical Tubing and Forging Stock, Aircraft Quality, 0.50Cr - 0.55Ni - 0.20Mo (0.13 - 0.18C) (SAE 8615) |  | 
              
              
                | SAE | SAE AS1182 | Standard Stock Removal Allowance, Aircraft-Quality and Premium Aircraft-Quality Steel Bars and Mechanical Tubing |  | 
              
              
                | SAE | SAE AMS6382 | Steel, Bars, Forgings, Rings, and Stock for Forging or Flash Welded Rings, Aircraft Quality, 0.95Cr - 0.20Mo (0.38 - 0.43C) (4140), Annealed_x000D_ |  | 
              
              
                | SAE | SAE AMS6290 | Steel, Bars, Forgings, and Forging Stock, Carburizing, 1.8Ni - 0.25Mo (0.11 - 0.17C) (SAE 4615) |  | 
              
              
                | SAE | SAE AMSS18732 | Steel Bars, Wire, Forging Stock, Forgings, Tubing (431),  Special Quality |  | 
              
              
                | SAE | SAE AMS6322 | Steel Bars, Forgings, and Rings and Stock for Forging or Flash Welded Rings, Aircraft-Quality 0.50Cr - 0.55Ni - 0.25Mo (0.38 - 0.43C) (8740) |  | 
              
              
                | SAE | SAE AMSS7108 | Steel, Alloy (Manganese-Silicon-Nickel), Bars and Forging  Stock (Aircraft Quality) |  | 
              
              
                | SAE | SAE AMSS7720 | Steel, Corrosion-Resistant (18-8) Bars, Wire and Forging Stock (Aircraft Quality) |  | 
              
              
                | SAE | SAE AMSS6709 | Steel, Chrome-Molybdenum-Aluminum; Bars, Rods, Billets and  Forging Stock (For Nitriding) (Aircraft Quality) |  | 
              
              
                | SAE | SAE AMS6539 | Steel Bars, Forgings, Mechanical Tubing and Forging Stock, 1.7Cr - 3.8Ni - 0.3Mo (0.32 - 0.38C), Aircraft-Quality |  | 
              
              
                | SAE | SAE AMS6481 | Steel Bars, Forgings, Mechanical Tubing, and Forging Stock Nitriding 3Cr - 1Mo - 0.2V - (0.29 - 0.36C) Premium Aircraft-Quality for Bearing Applications Double Vacuum Melted |  | 
              
              
                | SAE | SAE AMS6472 | Steel, Bars and Forgings and Forging Stock, Nitriding, 1.6Cr - 0.35Mo - 1.1Al (0.38 - 0.43C) (135 Mod), Aircraft Quality, Hardened and Tempered, 112 ksi (772 Mpa) Tensile Strength_x000D_ |  | 
              
              
                | BSI | BS EN 2157-2 | Steel. Forging stock and forgings. Technical specifications. Forging stock |  | 
              
              
                | SAE | SAE AMS6494 | Steel Bars, Forgings, Mechanical Tubing, and Forging Stock, 1.0Cr - 2.50Ni - 2.0Mo - 1.10Si (0.10 - 0.20C), Aircraft-Quality_x000D_ |  | 
              
              
                | SAE | SAE AMS6409 | Steel, Bars, Forgings, Mechanical Tubing and Forging Stock 0.80Cr - 1.8Ni - 0.25Mo (0.38 - 0.43C) (SAE 4340) Special Aircraft Quality Cleanliness Normalized and Tempered _x000D_ |  | 
              
              
                | SAE | SAE AMS6495 | Steel Bars, Forgings, Mechanical Tubing, and Forging Stock, 1.0Cr - 2.50Ni - 2.0Mo - 1.10Si (0.10 - 0.20C), Premium Aircraft-Quality, Electroslag Remelted or Consumable Electrode Vacuum Remelted |  | 
              
              
                | SAE | SAE AMS6340 | Steel Bars, Forgings, Mechanical Tubing and Forging Stock 0.88Cr - 1.8Ni - 0.42Mo - 0.08V (0.28 - 0.33C) (4330 Mod) Premium Aircraft Quality, Consumable Electrode Vacuum Remelted_x000D_ |  | 
              
              
                | SAE | SAE AMS6499 | Steel, Bars, Forgings, Mechanical Tubing and Forging Stock, 2.7Si - 0.85Cr - 1.8Ni - 0.4Mo - 0.2V - (0.37 - 0.44C) Premium Aircraft Quality, Double Vacuum Melted |  |