STRUCTURAL CARBON STEELS SC GRADE

MATERIALS
GRADE
CHEMICAL COMPOSITION %
C Si Mn P S
S10C 0.08~0.13 0.15~0.35 0.30~0.60 <0.030 <0.035
S12C
S15C
0.10~0.15
0.13~0.18
0.15~0.35 0.30~0.60 <0.030 <0.035
S17C
S20C
0.15~0.20
0.18~0.23
0.15~0.35 0.30~0.60 <0.030 <0.035
S22C
S25C
0.20~0.25
0.22~0.28
0.15~0.35 0.30~0.60 <0.030 <0.035
S28C
S30C
0.25~0.31
0.27~0.33
0.15~0.35 0.30~0.90 <0.030 <0.035
S33C
S35C
0.30~0.36
0.32~0.38
0.15~0.35 0.30~0.90 <0.030 <0.035
S38C
S40C
0.35~0.41
0.37~0.43
0.15~0.35 0.30~0.90 <0.030 <0.035
S43C
S45C
0.40~0.46
0.42~0.48
0.15~0.35 0.30~0.90 <0.030 <0.035
S48C
S50C
0.45~0.51
0.47~0.53
0.15~0.35 0.30~0.90 <0.030 <0.035
S53C
S55C
0.50~0.56
0.52~0.58
0.15~0.35 0.30~0.90 <0.030 <0.035
S58C 0.55~0.61 0.15~0.35 0.30~0.90 <0.030 <0.035
S09CK 0.07~0.12 0.15~0.35 0.30~0.60 <0.025 <0.025
S15CK 0.13~0.18 0.15~0.35 0.30~0.60 <0.025 <0.025
S20CK 0.18~0.23 0.15~0.35 0.30~0.60 <0.025 <0.025

HEAT TREATMENT

MATERIALS
GRADE
HEAT TREATMENT ℃
NORMALIZING ANNEALING quench TEMPER
S10C 900~950 Air cooled ab. 900 Furnace cooled
S12C
S15C
880~930 Air cooled ab. 880 Furnace coole
S17C
S20C
870~920 Air cooled ab. 860 Furnace cooled
S22C
S25C
860~910 Air cooled ab. 850 Furnace cooled
S28C
S30C
850~900 Air cooled ab. 840 Furnace cooled 850~900 Water quench 550~650 Rapidly cooled
S33C
S35C
840~890 Air cooled ab. 830 Furnace cooled 840~890 Water quench 550~650 Rapidly cooled
S38C
S40C
830~880 Air cooled ab. 820 Furnace cooled 830~880 Water quench 550~650 Rapidly cooled
S43C
S45C
820~870 Air cooled ab. 810 Furnace cooled 820~870 Water quench 550~650 Rapidly cooled
S48C
S50C
810~860 Air cooled ab. 800 Furnace cooled 810~860 Water quench 550~650 Rapidly cooled
S53C
S55C
800~850 Air cooled ab. 790 Furnace cooled 800~850 Water quench 550~650 Rapidly cooled
S58C 800~850 Air cooled ab. 790 Furnace cooled 800~850 Water quench 550~650 Rapidly cooled
S09CK 900~950 Air cooled ab. 900 Furnace cooled st. 880~920 Oil (Water) quench 2nd. 750~800 Water quench 150~200 Air cooled
S15CK 880~930 Air cooled ab. 880 Furnace coole 1st. 870~920 Oil (Water) quench 2nd. 750~800 Water quench 150~200 Air cooled