Practical Data for Metallurgists - Timken

SELECTED MILITARY SPECIFICATIONS
Chemical Composition Ranges and Limits
Solid
Nearest Equivalent
or P S
MIL (1) Tube C Mn Max Max Si Cr Ni Mo AMS SAE No.
S-5000 S .38/.43 .65/.85 .025 .025 .15/.35 .70/.90 1.65/2.00 .20/.30 6415 E4340
S-50783 (3) S 1.00/1.15 1.60/1.90 .035 .040 .70/1.00 .20 max .25 max .06 max
S-5626 S .38/.43 .75/1.00 .025 .025 .20/.35 .80/1.10 .25 max .15/.25 6382/6349 4140
S-6049 S .38/.43 .75/1.00 .025 .025 .20/.35 .40/.60 .40/.70 .20/.30 6322/6325/6327 8740
S-6050 (7) S .28/.33 .70/.90 .025 .025 .20/.35 .40/.60 .40/.70 .15/.25 6280 8630
S-6709 (4) S .38/.43 .50/.70 .025 .025 .20/.40 1.40/1.80 .............. .30/.40 6470/6472 ..............
S-6758 S .28/.33 .40/.60 .025 .025 .15/.35 .80/1.10 .25 max .15/.25 637 4130
S-7108 (5) S .23/.28 1.20/1.50 .040 .040 1.30/1.70 .40 max. 1.65/2.00 .35/.45 6425 4625M4 (2)
S-7393 (7) S .08/.13 .45/.60 .025 .025 .20/.35 1.25/1.75 3.25/3.75 .............. 6250 3310
S .14/.19 .45/.60 .025 .025 .20/.35 1.25/1.75 3.25/4.00 .............. .............. 3316
S .07/.13 .40/.70 .025 .025 .20/.35 1.00/1.40 3.00/3.50 .08/.15 .............. 9310
S-7420 S .98/1.10 .25/.45 .025 .025 .20/.35 1.30/1.60 .............. .............. 6440/6444/6447 52100
S-8503 (6) S .48/.53 .70/.90 .025 .025 .20/.35 .75/1.20 .............. .............. 6448 6150
16
(1) Some MIL numbers cancelled. Replaced by AMS numbers.
(2) Timken Company mill type.
Aircraft Quality Steels Except Where Indicated
Cu 5 .35 max unless specified
(3) Al 5 .020 max
(4) Al 5 .95/1.35
(5) P & S 5 .025 max if Basic Electric Furnace Steel is specified
(6) V 5 .15 min
(7) Inactive/Cancelled