Machinery's Handbook, 31st Edition
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COMPOSITION OF CARBON STEELS Table 4. Composition of AISI-SAE Standard Carbon Steels Table 4. (Continued) Composition of AISI-SAE Standard Carbon Steels
Composition(%) a
AISI-SAE No.
UNS No.
C
Mn
P(max) b
S(max) b
Nonresulfurized Grades — Over 1 percent Mn
1513 1522 1524 1526 1527 1541 1548 1551 1552 1561 1566 1110 1117 1118 1137 1139 1140 1141 1144 1146 1151 1211 1212 1213 1215
G15130 G15220 G15240 G15260 G15270 G15410 G15480 G15510 G15520 G15610 G15660 G11100 G11170 G11180 G11370 G11390 G11400 G11410 G11440 G11460 G11510
0.10-0.16 0.18-0.24 0.19-0.25 0.22-0.29 0.22-0.29 0.36-0.44 0.44-0.52 0.45-0.56 0.47-0.55 0.55-0.65 0.60-0.71
1.10-1.40 1.10-1.40 1.35-1.65 1.10-1.40 1.20-1.50 1.35-1.65 1.10-1.40 0.85-1.15 1.20-1.50 0.75-1.05 0.85-1.15
0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040 0.040
0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050
Free-Machining Grades — Resulfurized
0.08-0.13 0.14-0.20 0.14-0.20 0.32-0.39 0.35-0.43 0.37-0.44 0.37-0.45 0.40-0.48 0.42-0.49 0.48-0.55
0.30-0.60 1.00-1.30 1.30-1.60 1.35-1.65 1.35-1.65 0.70-1.00 1.35-1.65 1.35-1.65 0.70-1.00 0.70-1.00
0.08-0.13 0.08-0.13 0.08-0.13 0.08-0.13 0.13-0.20 0.08-0.13 0.08-0.13 0.24-0.33 0.08-0.13 0.08-0.13 0.10-0.15 0.16-0.23 0.24-0.33 0.26-0.35
Free-Machining Grades — Resulfurized and Rephosphorized
G12110 G12120 G12130 G12150 G12144
0.13 max 0.13 max 0.13 max 0.09 max 0.15 max
0.60-0.90 0.70-1.00 0.70-1.00 0.75-1.05 0.85-1.15
0.07-0.12 0.07-0.12 0.07-0.12 0.04-0.09 0.04-0.09
12L14 d 0.26-0.35 a The following notes refer to boron, copper, lead, and silicon additions. Boron: Standard killed carbon steels, which are generally fine grain, may be produced with a boron treatment addition to improve hardenability. Such steels are produced to a range of 0.0005–0.003 percent B. These steels are identified by inserting the letter “B” between the second and third numerals of the AISI or SAE number, e.g., 10B46. Copper: When copper is required, 0.20 percent (min) is generally specified. Lead: Standard carbon steels can be produced with a lead range of 0.15–0.35 percent to improve machinability. Such steels are identified by inserting the letter “L” between the second and third numerals of the AISI or SAE number, e.g., 12L15 and 10L45. Silicon: It is not common practice to produce the 12XX series of resulfurized and rephosphorized steels to specified limits for silicon because of its adverse effect on machinability. When silicon ranges or limits are required for resulfurized or nonresulfurized steels, however, these values apply: a range of 0.08 percent Si for Si max up to 0.15 percent inclusive, a range of 0.10 percent Si for Si max over 0.15 to 0.20 percent inclusive, a range of 0.15 percent Si for Si max over 0.20 to 0.30 percent inclusive, and a range of 0.20 percent Si for Si max over 0.30 to 0.60 percent inclusive. Example: Si max is 0.25 percent, range is 0.10–0.25 percent. b Values given are maximum percentages, except where a range of values is given. c Standard grades for wire rods and wire only. d 0.15–0.35 percent Pb.
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