PS Grades (Formerly EX Grades) 

Table of Contents | Glossary of Metallurgical Terms
Useful Equations for Hardenable Alloy Steel | Handy Physical Constants
Engineering Conversion Factors

 

 

Chemical Composition Ranges and Limits

PS
No.
C Mn Cr Ni Mo Other
10 .19/.24 .95/1.25 .25/.40 .20/.40 .05/.10 ..............
16 .20/.25 .90/1.20 .40/.60 .............. .13/.20 ..............
17 .23/.28 .90/1.20 .40/.60 .............. .13/.20 ..............
18 .25/.30 .90/1.20 .40/.60 .............. .13/.20 B
19 .18/.23 .90/1.20 .40/.60 .............. .08/.15 .0005-.003
20 .13/.18 .90/1.20 .40/.60 .............. .13/.20 ..............
21 .15/.20 .90/1.20 .40/.60 .............. .13/.20 ..............
31 .15/.20 .70/.90 .45/.65 .70/1.00 .45/.60 ..............
32 .18/.23 .70/.90 .45/.65 .70/1.00 .45/.60 ..............
33 .17/.24 .85/1.25 .20 min .20 min .05 min ..............
34 .28/.33 .90/1.20 .40/.60 .............. .13/.20 ..............
36 .38/.43 .90/1.20 .45/.65 .............. .13/.20 ..............
38 .43/.48 .90/1.20 .45/.65 .............. .13/.20 ..............
39 .48/.53 .90/1.20 .45/.65 .............. .13/.20 ..............
40 .51/.59 .90/1.20 .45/.65 .............. .13/.20 ..............
54 .19/.25 .70/1.05 .40/.70 .............. .05 min ..............
55 .15/.20 .70/1.00 .45/.65 1.65/2.00 .65/.80 ..............
56 .08/.13 .70/1.00 .45/.65 1.65/2.00 .65/.80 ..............
57* .08 max 1.25 max 17.00/19.00 .............. 1.75/2.25 ..............
58 .16/.21 1.00/1.30 .45/.65 .............. .............. ..............
59 .18/.23 1.00/1.30 .70/.90 .............. .............. ..............
61 .23/.28 1.00/1.30 .70/.90 .............. .............. B
63 .31/.38 .75/1.10 .45/.65 .............. .............. .0005-.003
64 .16/.21 1.00/1.30 .70/.90 .............. .............. ..............
65 .21/.26 1.00/1.30 .70/.90 .............. .............. V
66 .16/.21 .40/.70 .45/.75 1.65/2.00 .08/.15 .10/.15
67 .42/.49 .80/1.20 .85/ 1.20 .............. .25/.35 ..............
Unless Specified:
Si = .15/.35, P = .035 max, S = .040 max

*P = .040 max, S = .15/.35, Si = 1.00 max

Note : PS Nos. 15, 24 and 30 are now standard grades.
(See SAE Nos. 4120, 4121 and 4715)