PRODUCT
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KS JIS ȭ (%) () ó () ִȿ (mm) ɿµ()
C Si Mn P S Cu Ni Cr Ni+Cr (N) (A) (Q) (T) Ac Ar
SM10C S10C 0.08 0.15 0.3 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 900~950 900 - - - 720 850 Spark plug ð ǰ
0.13 0.35 0.6 ~900 ~880 ~780
SM15C S15C 0.13 0.15 0.3 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 880~930 880 - - - 720 845 Head Bolt, Pin ϴ ǰ
0.18 0.35 0.6 ~900 ~880 ~770
SM20C S20C 0.18 0.15 0.3 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 870~920 860 - - - 720 815
0.2 0.35 0.6 ~900 ~845 ~730
SM25C S25C 0.22 0.15 0.3 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 860~910 850 - - - 720 780
0.28 0.35 0.6 ~900 ~840 ~730
SM30C S30C 0.27 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 850~900 840 850~900 550~650 30 720 780 λƮ, Gear ǰ
0.33 0.35 0.9 ~850 ~815 ~720
SM35C S35C 0.32 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 840~890 830 840~890 550~650 32 720 770
0.38 0.35 0.9 ~850 ~800 ~710
SM38C S38C 0.35 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 830~880 820 830~880 550~650 35 720 760
0.41 0.35 0.9 ~850 ~790 ~710
SM40C S40C 0.37 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35
0.43 0.35 0.9
SM45C S45C 0.42 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1100 820~870 810 820~870 550~650 37 720 750 Crank, ׽Ʈ ǰð Header, Bolt
0.48 0.35 0.9 ~850 ~780 ~680
SM48C S48C 0.45 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1050 810~860 800 810~860 550~650 40 720 740
0.51 0.35 0.9 ~850 ~770 ~680
SM50C S50C 0.47 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35
0.53 0.35 0.9
SM55C S55C 0.52 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1050 800~850 790 800~850 550~650 42 720 740 Connecting Rod, Pin,Gear ǰ
0.58 0.35 0.9 ~850 ~765 ~680
SM58C S58C 0.55 0.15 0.6 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 1050 800~850 790 800~850 550~650 42 720 730
0.61 0.35 0.9 ~850 ɴ ~760 ~680
KS ó  

(N/)

(N/)

(%)

(%)
ġ
(J/)
긮ڰ浵
(HB)
SM10C N ≥206 ≥314 ≥33 - - 109~156
A - - - - - 109~149
SM12C N ≥235 ≥373 ≥30 - - 111~167
SM15C A - - - - - 111~149
SM17C N ≥245 ≥402 ≥28 - - 116~174
SM20C A - - - - - 114~153
SM22C N ≥265 ≥411 ≥27 123~183
SM25C A - - - - - 121~156
SM28C N ≥284 ≥471 ≥25 137~197
SM30C A - - - - - 126~156
QT ≥333 ≥539 ≥23 ≥57 ≥108 152~212
SM33C N ≥304 ≥510 ≥23 - - 149~207
SM35C A - - - - - 126~163
QT ≥392 ≥569 ≥22 ≥55 ≥98.1 167~235
SM38C N ≥324 ≥539 ≥22 - - 156~217
SM40C A - - - - - 131~163
QT ≥441 ≥608 ≥20 ≥50 ≥88 179~255
SM43C N ≥343 ≥569 ≥20 - - 167~229
SM45C A - - - - - 137~170
QT ≥490 ≥686 ≥17 ≥45 ≥78 201~269
SM48C N ≥363 ≥608 ≥18 - - 179~235
SM50C A - - - - - 143~187
QT ≥539 ≥735 ≥15 ≥40 ≥69 212~277
SM53C N ≥392 ≥647 ≥15 - - 183~255
SMSSC A - - - - - 149~192
QT ≥588 ≥785 ≥14 ≥35 ≥59 229~285
SM58C N ≥392 ≥647 ≥15 - - 183~255
A - - - - - 140~192
QT ≥588 ≥785 ≥14 ≥35 ≥59 229~285





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