2. JIS G 4051-1979 [S-C] Carbon Steel for Machine Structural Use

Code Chemical Composition (%) C Si Mn P S SM10C 0.08~0.13 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM12C 0.13~0.18 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM15C 0.13~0.18 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM17C 0.15~0.20 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM20C 0.18~0.23 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM22C 0.20~0.25 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM25C 0.22~0.28 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM28C 0.25~0.31 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM30C 0.27~0.33 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM33C 0.30~0.36 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM35C 0.32~0.38 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM38C 0.35~0.41 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM40C 0.37~0.43 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM43C 0.40~0.46 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM45C 0.42~0.48 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM48C 0.45~0.51 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM50C 0.47~0.53 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM53C 0.50~0.56 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM55C 0.52~0.58 0.15~0.35 0.30~0.60 0.030 max. 0.035 max. SM58C 0.55~0.61 0.15~0.35 0.30~0.60 0.030 max. 0.035 max.

3. Plastic Mold Steel (POSMOLD)

Code Chemical Composition (%) Remark C Si Mn P S POSMOLD POSMOLD1 0.47~0.53 0.15~0.35 0.60~0.90 0.030 max. 0.020 max. POSCO MOLDBASE POSMOLD2 0.38~0.43 0.15~0.35 0.60~0.90 0.030 max. 0.020 max.

4. SAE J 403-1984 Structural Carbon Steel Plates

Code Chemical Composition (%) C Mn P S 1006 0.08 max. 0.45 max. 0.035 max. 0.040 max. 1008 0.10 max. 0.50 max. 0.035 max. 0.040 max. 1009 0.15 max. 0.60 max. 0.035 max. 0.040 max. 1010 0.08~0.13 0.30~0.60 0.035 max. 0.040 max. 1012 0.10~0.15 0.30~0.60 0.035 max. 0.040 max.   1015 0.12~0.18 0.30~0.60 0.035 max. 0.040 max. 1016 0.12~0.18 0.60~0.90 0.035 max. 0.040 max. 1017 0.14~0.20 0.30~0.60 0.035 max. 0.040 max. 1018 0.14~0.20 0.60~0.90 0.035 max. 0.040 max. 1019 0.14~0.20 0.70~1.00 0.035 max. 0.040 max.   1020 0.17~0.23 0.30~0.60 0.035 max. 0.040 max. 1021 0.17~0.23 0.60~0.90 0.035 max. 0.040 max. 1022 0.17~0.23 0.70~1.00 0.035 max. 0.040 max. 1023 0.19~0.25 0.30~0.60 0.035 max. 0.040 max. 1025 0.22~0.28 0.60~0.90 0.035 max. 0.040 max.   1026 0.22~0.28 0.60~0.90 0.035 max. 0.040 max. 1030 0.27~0.31 0.60~0.90 0.035 max. 0.040 max. 1033 0.29~0.36 0.70~1.00 0.035 max. 0.040 max. 1035 0.31~0.38 0.60~0.90 0.035 max. 0.040 max. 1037 0.31~0.38 0.70~1.00 0.035 max. 0.040 max.   1038 0.31~0.42 0.60~0.90 0.035 max. 0.040 max. 1039 0.36~0.41 0.70~1.00 0.035 max. 0.040 max. 1040 0.36~0.44 0.60~0.90 0.035 max. 0.040 max. 1042 0.39~0.47 0.60~0.90 0.035 max. 0.040 max. 1043 0.39~0.47 0.70~1.00 0.035 max. 0.040 max.           1045 0.42~0.50 0.60~0.90 0.035 max. 0.040 max. 1046 0.42~0.50 0.70~1.00 0.035 max. 0.040 max. 1049 0.45~0.53 0.60~0.90 0.035 max. 0.040 max. 1050 0.47~0.55 0.60~0.90 0.035 max. 0.040 max. 1055 0.52~0.60 0.60~0.90 0.035 max. 0.040 max.           1060 0.55~0.66 0.60~0.90 0.035 max. 0.040 max. 1064 0.59~0.70 0.50~0.80 0.035 max. 0.040 max. 1065 0.59~0.70 0.60~0.90 0.035 max. 0.040 max. 1070 0.65~0.76 0.60~0.90 0.035 max. 0.040 max. 1074 0.69~0.80 0.50~0.80 0.035 max. 0.040 max.           1075 0.69~0.80 0.40~0.70 0.035 max. 0.040 max. 1078 0.72~0.86 0.30~0.60 0.035 max. 0.040 max. 1080 0.74~0.88 0.60~0.90 0.035 max. 0.040 max. 1084 0.80~0.94 0.60~0.90 0.035 max. 0.040 max. 1085 0.80~0.94 0.70~1.00 0.035 max. 0.040 max.   1086 0.80~0.94 0.30~0.50 0.035 max. 0.040 max. 1090 0.84~0.98 0.60~0.90 0.035 max. 0.040 max. 1095 0.90~1.04 0.30~0.50 0.035 max. 0.040 max.