Selected AMS Alloy Steel Specifications
Chemical Composition Ranges and Limits
AMS No. C Mn Si Cr Ni Mo V Other
Designations
6250 .07/.13 .40/.70 .15/.35 1.25/1.75 3.25/3.75 .06 max — 3310
62601 .07/.13 .40/.70 .15/.35 1.00/1.40 3.00/3.50 .08/.15 — 9310
6263 .11/.17 .40/.70 .15/.35 1.00/1.40 3.00/3.50 .08/.15 — 9315
6264 .14/.20 .40/.70 .15/.35 1.00/1.40 3.00/3.50 .08/.15 — 9317
62652 .07/.13 .40/.70 .15/.35 1.00/1.40 3.00/3.50 .08/.15 — 9310
62663 .08/.13 .75/1.00 .20/.40 .40/.60 1.65/2.00 .20/.30 .03/.08 43BV12
6270 .11/.17 .70/1.00 .15/.35 .40/.60 .40/.70 .15/.25 — 8615
6272 .15/.20 .70/1.00 .15/.35 .40/.60 .40/.70 .15/.25 — 8617
6274 .17/.23 .75/1.00 .15/.35 .35/.65 .35/.75 .15/.25 — 8620
62753 .15/.20 .60/.95 .15/.35 .30/.50 .30/.60 .08/.15 — 94B17
6280 .28/.33 .70/.90 .15/.35 .40/.60 .40/.70 .15/.25 — 8630
6281 .28/.33 .70/.90 .15/.35 .40/.60 .40/.70 .15/.25 — 8630
6282 .33/.38 .75/1.00 .15/.35 .40/.60 .40/.70 .20/.30 — 8735
6290 .11/.17 .45/.65 .15/.35 .20 max 1.65/2.00 .20/.30 — 4615
6292 .15/.20 .45/.65 .15/.35 .20 max 1.65/2.00 .20/.30 — 4617
6294 .17/.22 .45/.65 .15/.35 .20 max 1.65/2.00 .20/.30 — 4620
6299 .17/.23 .40/.70 .15/.35 .35/.65 1.55/2.00 .20/.30 — 4320
63004 .35/.40 .70/.90 .15/.35 .20 max .25 max .20/.30 — 4037
6302 .28/.33 .45/.65 .55/.75 1.00/1.50 .25 max .40/.60 .20/.30 17-22-AS®
63035 .25/.30 .60/.90 .55/.75 1.00/1.50 .50 max .40/.60 .75/.95 17-22-AV®
6304 .40/.50 .40/.70 .15/.35 .80/1.10 .25 max .45/.65 .25/.35 —
6312 .38/.43 .60/.80 .15/.35 .20 max 1.65/2.00 .20/.30 — 4640
6320 .33/.38 .75/1.00 .15/.35 .40/.60 .40/.70 .20/.30 — 8735
63213 .38/.43 .75/1.00 .15/.35 .30/.55 .20/.40 .08/.15 — 81B40
6322 .38/.43 .75/1.00 .15/.35 .40/.60 .40/.70 .20/.30 — 8740
6323 .38/.43 .75/1.00 .15/.35 .40/.60 .40/.70 .20/.30 — 8740
6324 .38/.43 .75/1.00 .15/.35 .55/.75 .55/.85 .20/.30 — 8740 Mod
6328 .48/.53 .75/1.00 .15/.35 .40/.60 .40/.70 .20/.30 — 8750
6342 .38/.43 .70/.90 .15/.35 .70/.90 .85/1.15 .20/.30 — 9840
6371 .28/.33 .40/.60 .15/.35 .80/1.10 .25 max .15/.25 — 4130
6372 .33/.38 .70/.90 .15/.35 .80/1.10 .25 max .15/.25 — 4135
6381 .38/.43 .75/1.00 .15/.35 .80/1.10 .25 max .15/.25 — 4140
6382 .38/.43 .75/1.00 .15/.35 .80/1.10 .25 max .15/.25 — 4140
6407 .27/.33 .60/.80 .40/.70 1.00/1.35 1.85/2.25 .35/.55 — HS220-07
64096 .38/.43 .65/.85 .15/.35 .70/.90 1.65/2.00 .20/.30 — 4340*
6412 .35/.40 .65/.85 .15/.35 .70/.90 1.65/2.00 .20/.30 — 4337
64142 .38/.43 .60/.90 .15/.35 .70/.90 1.65/2.00 .20/.30 — CV4340
6415 .38/.43 .65/.85 .15/.35 .70/.90 1.65/2.00 .20/.30 — 4340
6418 .23/.28 1.20/1.50 1.30/1.70 .20/.40 1.65/2.00 .35/.45 — 4625M4
64197 .40/.45 .60/.90 1.45/1.80 .70/.95 1.65/2.00 .30/.50 .05/.10 300M
64213 .35/.40 .65/.85 .15/.35 .70/.90 .70/1.00 .15/.25 — 98B37 Mod
64223 .38/.43 .65/.85 .15/.35 .70/.90 .70/1.00 .15/.25 .01/.06 98B40 Mod
6427 .28/.33 .75/1.00 .15/.35 .75/1.00 1.65/2.00 .35/.50 .05/.10 4330M4V1
6428 .32/.38 .60/.80 .15/.35 .65/.90 1.65/2.00 .30/.40 .17/.23 —
64302 .32/.38 .60/.90 .40/.60 .65/.90 1.65/2.00 .30/.40 .17/.23 4335M4V2
64317 .45/.50 .60/.90 .15/.30 .90/1.20 .40/.70 .90/1.10 .08/.15 D6-AC
6440 .98/1.10 .25/.45 .15/.35 1.30/1.60 .25 max .10 max — 52100
64442 .98/1.10 .25/.45 .15/.35 1.30/1.60 .25 max .08 max — CV52100
64452 .92/1.02 .95/1.25 .50/.70 .90/1.15 .25 max .08 max — 51100
6448 .48/.53 .70/.90 .15/.35 .80/1.10 .25 max .06 max .15/.30 6150

NOTE: P & S = .025 max, Cu = .35 max unless specified.
* Special Aircraft Quality.
1 Boron = .001 max.
2 P & S = .015 max.
3 Boron = .0005/.005.
4 P & S = .040 max.
5 Cu = .50 max.
6 P = .015 max, S = .008 max.
7 P & S = .010 max.

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