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(Unit : %)
Classification C Mn P S
KS D3503 JIS G3101
SS330 SS330 - - Max. 0.050 Max. 0.050
SS400 SS400
SS490 SS490
SS540 SS540 Max. 0.30 Max. 1.60 Max. 0.040 Max. 0.040
SS590 -
 
(Unit : %)
Classification C Si Mn P S B Mo
KS D3752 JIS G4051
SM 10C S10C 0.08¢¦0.13 0.15¢¦0.35 0.30¢¦0.60 Max. 0.030 Max. 0.035 - -
SM 15C S15C 0.13¢¦0.18 0.15¢¦0.35 0.30¢¦0.60 Max. 0.030 Max. 0.035 - -
SM 20C S20C 0.18¢¦0.23 0.15¢¦0.35 0.30¢¦0.60 Max. 0.030 Max. 0.035 - -
SM 25C S25C 0.22¢¦0.28 0.15¢¦0.35 0.30¢¦0.60 Max. 0.030 Max. 0.035 - -
SM 30C S30C 0.27¢¦0.33 0.15¢¦0.35 0.60¢¦0.90 Max. 0.030 Max. 0.035 - -
SM 38C S38C 0.35¢¦0.41 0.15¢¦0.35 0.60¢¦0.90 Max. 0.030 Max. 0.035 - -
SM 40C S40C 0.37¢¦0.43 0.15¢¦0.35 0.60¢¦0.90 Max. 0.030 Max. 0.035 - -
SM 45C S45C 0.42¢¦0.48 0.15¢¦0.35 0.60¢¦0.90 Max. 0.030 Max. 0.035 - -
SM 50C S50C 0.47¢¦0.53 0.15¢¦0.35 0.60¢¦0.90 Max. 0.030 Max. 0.035 - -
SM 55C S55C 0.52¢¦0.58 0.15¢¦0.35 0.60¢¦0.90 Max. 0.030 Max. 0.035 - -
 
(Unit : %)
Classification C Si Mn P S Cr Mo V B
KS D3701 JIS G4801
SPS 6 SUP 6 0.56¢¦0.64 1.50¢¦1.80 0.70¢¦1.00 Max. 0.030 Max. 0.030 - - - -
SPS 7 SUP 7 0.56¢¦0.64 1.80¢¦2.20 0.70¢¦1.00 Max. 0.030 Max. 0.030 - - - -
SPS 9 SUP 9 0.52¢¦0.60 0.15¢¦0.35 0.65¢¦0.95 Max. 0.030 Max. 0.030 0.65¢¦0.95 - - -
SPS 9A SUP 9A 0.56¢¦0.64 0.15¢¦0.35 0.70¢¦1.00 Max. 0.030 Max. 0.030 0.70¢¦1.00 - - -
SPS 10 SUP 10 0.47¢¦0.55 0.15¢¦0.35 0.65¢¦0.95 Max. 0.030 Max. 0.030 0.80¢¦1.10 - 0.15¢¦0.25 -
SPS 11A SUP 11A 0.56¢¦0.64 0.15¢¦0.35 0.70¢¦1.00 Max. 0.030 Max. 0.030 0.70¢¦1.00 - - Min. 0.0005
SPS 12 SUP 12 0.51¢¦0.59 1.20¢¦1.60 0.60¢¦0.90 Max. 0.030 Max. 0.030 0.60¢¦0.90 - - -
SPS 13 SUP 13 0.56¢¦0.64 0.15¢¦0.35 0.70¢¦1.00 Max. 0.030 Max. 0.030 0.70¢¦0.90 0.25¢¦0.35 - -
 
(Unit : %)
Classification C Si Mn P S Cr Mo
KS D3525 JIS G4805
STB 1 - 0.95¢¦1.10 0.15¢¦0.35 Max. 0.50 Max. 0.025 Max. 0.025 0.90¢¦1.20 -
STB 2 SUJ 2 0.95¢¦1.10 0.15¢¦0.35 Max. 0.50 Max. 0.025 Max. 0.025 1.30¢¦1.60 -
STB 3 SUJ 3 0.95¢¦1.10 0.40¢¦0.70 0.90¢¦1.15 Max. 0.025 Max. 0.025 0.90¢¦1.20 -
STB 4 SUJ 4 0.95¢¦1.10 0.15¢¦0.35 Max. 0.50 Max. 0.025 Max. 0.025 1.30¢¦1.60 0.10¢¦0.25
STB 5 SUJ 5 0.95¢¦1.10 0.40¢¦0.70 0.90¢¦1.15 Max. 0.025 Max. 0.025 0.90¢¦1.20 0.10¢¦0.25
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