● 쾌삭강 ( Free Cutting Carbon Steels )

● 화학성분

K S 화 학 성 분(%) JIS C Mn P S Pb SUM11 0.08~0.13 0.30~0.60 ≤0.040 0.08 ~ 0.13 - SUM11 SUM12 0.08~0.13 0.60~0.90 ≤0.040 0.08 ~ 0.13 - SUM12 SUM21 ≤0.13 0.70~1.00 0.07 ~0.12 0.16 ~ 0.23 - SUM21 SUM22 ≤0.13 0.70~1.00 0.07 ~0.12 0.24 ~ 0.33 - SUM22 SUM22L ≤0.13 0.70~1.00 0.07 ~0.12 0.24 ~ 0.33 0.10 ~ 0.35 SUM22L SUM23 ≤0.09 0.75~1.05 0.04 ~ 0.09 0.26 ~ 0,35 - SUM23 SUM23L ≤0.09 0.75~1.05 0.04 ~ 0.09 0.26 ~ 0,35 0.10 ~ 0.35 SUM23L SUM24L ≤0.15 0.85~1.15 0.04 ~ 0.09 0.26 ~ 0,35 0.10 ~ 0.35 SUM24L SUM31 0.14~0.20 1.00~1.30 ≤0.040 0.08 ~ 0.13 - SUM31 SUM31L 0.14~0.20 1.00~1.30 ≤0.040 0.08 ~ 0.13 0.10 ~ 0.35 SUM31L SUM32 0.12~0.20 0.60~1.10 ≤0.040 0.10 ~ 0.20 - SUM32 SUM41 0.32~0.39 1.35~1.65 ≤0.040 0.08 ~ 0.13 - SUM41 SUM42 0.37~0.45 1.35~1.65 ≤0.040 0.08 ~ 0.13 - SUM42 SUM43 0.40~0.48 1.35~1.65 ≤0.040 0.24 ~ 0.33 - SUM43 SM53CUS1 0.50~0.56 0.70~1.10 ≤0.030 0.04 ~ 0.07 0.001 ~ 0.010 (Ca) -