HOME > 제품소개 > 화학성분 기계구조용강 취급강재종류 화학성분 (1%) 구분 KS 규격 JIS 규격 C Si Mn P S Cu Ni Cr Ni+Cr Mo 단조온도 탄소강 저탄소강 SM10C S10C 0.08 ~ 0.13 0.15 ~ 0.35 0.30 ~ 0.60 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 900 空冷 SM15C S15C 0.13 ~ 0.18 0.15 ~ 0.35 0.30 ~ 0.60 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 900 空冷 SM20C S20C 0.18 ~ 0.23 0.15 ~ 0.35 0.30 ~ 0.60 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 900 空冷 SM25C S25C 0.22 ~ 0.28 0.15 ~ 0.35 0.30 ~ 0.60 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 900 空冷 중탄소강 SM30C S30C 0.27 ~ 0.33 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 850 空冷 SM35C S35C 0.32 ~ 0.38 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 850 空冷 SM38C S38C 0.35 ~ 0.41 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 850 空冷 SM45C S45C 0.42 ~ 0.48 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1100 ~ 850 空冷 고탄소강 SM48C S48C 0.45 ~ 0.51 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1050 ~ 850 空冷 SM50C S50C 0.47 ~ 0.53 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1050 ~ 850 空冷 SM55C S55C 0.52 ~ 0.58 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1050 ~ 850 空冷 SM58C S58C 0.55 ~ 0.61 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.035 ≤0.30 ≤0.20 ≤0.20 ≤0.35 - 1050 ~ 850 空冷 합금강 크롬강 SCr415 SCr415 0.13 ~ 0.18 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - - 1100 ~ 900 空冷 SCr420 SCr420 0.18 ~ 0.23 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - - 1100 ~ 900 空冷 SCr430 SCr430 0.28 ~ 0.33 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - - 1100 ~ 900 空冷 SCr440 SCr440 0.38 ~ 0.43 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - - 1100 ~ 900 空冷 크롬몰리브덴강 SCM415 SCM415 0.13 ~ 0.18 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - 0.15 ~ 0.30 1100 ~ 900 空冷 SCM420 SCM420 0.18 ~ 0.23 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - 0.15 ~ 0.30 1100 ~ 900 空冷 SCM435 SCM435 0.33 ~ 0.38 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - 0.15 ~ 0.30 1050 ~ 850空冷 SCM440 SCM440 0.38 ~ 0.43 0.15 ~ 0.35 0.60 ~ 0.85 ≤0.030 ≤0.030 ≤0.30 ≤0.25 0.90 ~ 1.20 - 0.15 ~ 0.30 1050 ~ 850空冷 니켈크롬몰리브덴강 SNCM220 (SNCM21) SNCM220 0.17 ~ 0.23 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.030 ≤0.30 1.40 ~ 0.70 0.40 ~ 0.65 - 0.15 ~ 0.30 1100 ~ 850空冷 SNCM420 (SNCM23) SNCM420 0.17 ~ 0.23 0.15 ~ 0.35 0.40 ~ 0.70 ≤0.030 ≤0.030 ≤0.30 1.60 ~ 2.00 0.40 ~ 0.65 - 0.15 ~ 0.30 1050 ~ 850空冷 SNCM439 (SNCM8) SNCM439 0.36 ~ 0.43 0.15 ~ 0.35 0.60 ~ 0.90 ≤0.030 ≤0.030 ≤0.30 1.60 ~ 2.00 0.60 ~ 1.00 - 0.15 ~ 0.30 1050 ~ 850空冷 SNCM616 (SNCM26) SNCM616 0.13 ~ 0.20 0.15 ~ 0.35 0.80 ~ 1.20 ≤0.030 ≤0.030 ≤0.30 2.80 ~ 3.20 1.40 ~ 1.80 - 0.15 ~ 0.30 1050 ~ 850空冷 SNCM630 (SNCM5) SNCM630 0.25 ~ 0.35 0.15 ~ 0.35 0.35 ~ 0.60 ≤0.030 ≤0.030 ≤0.30 2.50 ~ 3.50 2.50 ~ 3.50 - 0.15 ~ 0.30 1050 ~ 850空冷 질화강 SAlCrMol   0.40 ~ 0.50 0.15 ~ 0.50 ≤0.60 ≤0.030 ≤0.030 ≤0.30 ≤0.25 1.30 ~ 1.70 - 0.15 ~ 0.30 - 쾌삭강 SUM21 SUM21 ≤0.13 - 0.70 ~ 1.00 0.07  ~ 0.12 0.16  ~ 0.23 - - - - - - SUM22 SUM22 ≤0.13 - 0.70 ~ 1.00 0.07  ~ 0.12 0.24  ~ 0.33 - - - - - - SUM41 SUM41 0.32 ~ 0.39 - 1.35 ~ 1.65 ≤0.040 0.08  ~ 0.13 - - - - - - SUM43 SUM43 0.40 ~ 0.48 - 1.35 ~ 1.65 ≤0.040 0.24  ~ 0.33 - - - - - - 공구강 구분 KS 규격 JIS 규격 C Si Mn Ni P S Cr Mo W V Co 단조온도 탄소 공구강 STC3 SK3 1.00~1.10 ≤0.35 ≤0.50 - ≤0.030 ≤0.030 - - - - -   STC4 SK4 0.90~1.00 ≤0.35 ≤0.50   ≤0.030 ≤0.030 - - - - -   특수 공구강 냉간금형용 STS3 SKS3  0.90  ~1.00 ≤0.35 0.90 ~ 1.20 - - - 0.50 ~ 1.00 - 0.50 ~ 1.00 - - 1100 ~ 850 空冷 STS31 SKS31 0.95  ~1.05 ≤0.35 0.90 ~ 1.20 - - - 0.80 ~ 1.20 - 1.00 ~ 1.05 - - 1100 ~ 850 空冷 STD11 SKD11 1.40  ~1.60 ≤0.40 ≤0.60 - ≤0.60 ≤0.030 11.00 0.80 ~ 1.20   0.20 ~ 0.50 -   열간금형용 STD61 SKD61 0.32  ~0.42 0.80 ~ 1.20 ≤0.50 - ≤0.030 ≤0.030 4.50 ~ 5.50 1.00 ~ 1.50 - 0.80 ~ 1.20 - 1100 ~ 900 空冷 STD62 SKD62 0.32 ~0.42 0.80 ~ 1.20 ≤0.50 - ≤0.030 ≤0.030 4.50 ~ 5.50 1.00 ~ 1.50 1.00 ~ 1.50 0.20 ~ 0.60 - 1100 ~ 900 空冷 STF4 SKT4 0.50  ~0.60 ≤0.35 0.60 ~ 1.00 1.30 ~ 2.00 - - 0.70 ~ 1.00 0.20 ~ 0.50 - - - 1100 ~ 900 空冷 고속도 공구강 SKH51 SKH51 0.80 ~0.90 ≤0.40 ≤0.40 - - - 3.80 ~ 4.50 4.50 ~ 5.50 5.50 ~ 6.70 1.60 ~ 2.20 - 1150 ~ 950 空冷 SKH55 SKH55 0.85  ~0.95 ≤0.40 ≤0.40 - - - 3.80 ~ 4.50 4.60 ~ 5.30 5.70 ~ 6.70 1.70 ~ 2.20 4.50 ~ 5.50 1150 ~ 950 空冷 SKH59 SKH59 1.00  ~1.15 ≤0.50 ≤0.40 - - - 3.50 ~ 4.50 9.50 ~ 10.00 1.20 ~ 1.90 0.90 ~ 1.40 7.50 ~ 8.50 1150 ~ 950 空冷 스테인레스강 구 분 규격 C Si Mn P S Ni Cr Mo Cu 단조온도 KS JIS AISI/SAE DIN (재료번호) 오스테나이트 STS303 SUS303 303 X10CrNiS189 (1.4371) ≤0.15 ≤1.00 ≤2.00 ≤0.20 ≤0.15 8.00 ~ 10.00 17.00 ~ 19.00 ≤0.60 - 1010 ~ 1150 空冷 STS304 SUS304 304 X5CrNi1810 (1.4301) ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 8.00 ~ 10.50 18.00 ~ 20.00 - - 1010 ~ 1150 空冷 STS304L SUS304L 304L X2CrNi1911 ≤0.030 ≤1.00 ≤2.00 ≤0.045 ≤0.030 9.00 ~ 13.00 18.00 ~ 20.00 - - 1010 ~ 1150 空冷 STS316 SUS316 316 X5CrNiMo17122 (1.4401) ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 10.00 ~ 14.00 16.00 ~ 18.00 2.00 ~ 3.00 - 1010 ~ 1150 空冷 STS316L SUS316L 316L X5CrNiMo17132 (1.4404) ≤0.030 ≤1.00 ≤2.00 ≤0.045 ≤0.030 12.00 ~ 15.00 16.00 ~ 18.00 2.00 ~ 3.00 - 1010 ~ 1150 空冷 STS321 SUS321 321 (1.4541) ≤0.08 ≤1.00 ≤2.00 ≤0.045 ≤0.030 9.00 ~ 13.00 17.00 ~ 19.00 - - 920 ~ 1150 空冷 STS310S SUS310S (1.4845) ≤0.08 ≤1.50 ≤2.00 ≤0.045 ≤0.030 19.00 ~ 22.00 24.00 ~ 26.00 - - 1030 ~ 1180 空冷 말텐사이트계 STS403 SUS403 403 (1.4000) ≤0.15 ≤0.50 ≤1.00 ≤0.040 ≤0.030 ≤0.60 11.50 ~ 13.00 - - 800  ~  900 空冷 STS410 SUS410 410 X10CrB (1.4006) ≤0.15 ≤1.00 ≤1.00 ≤0.040 ≤0.030 ≤0.60 11.50 ~ 13.50 - - 800  ~  900 空冷 STS420J2 SUS420J2 420 X30CrB (1.4028) 0.26  ~0.40 ≤1.00 ≤1.00 ≤0.040 ≤0.030 ≤0.60 12.00 ~ 14.00 - - 800  ~  900 空冷 석출경화계 STS630 SUS630 (1.4542) ≤0.07 ≤1.00 ≤1.00 ≤0.040 ≤0.030 3.00 ~ 5.00 15.50 ~ 17.50 - 3.00 ~ 5.00 1020 ~ 1060空冷 특수용도강 구 분 규격 C Si Mn P S Cu Ni Cr Mo Ti O KS JIS AISI/SAE DIN 베어링강 STB2 SUJ2 52100 100Cr6 0.95 ~ 1.10 0.15 ~ 0.35 ≤0.50 ≤0.025 ≤0.025 ≤0.25 ≤0.25 1.30 ~ 1.60 ≤0.08 ≤0.0035 ≤0.0012 스프링강 SPS5A SUP9A 5160 0.56 ~ 0.64 0.15 ~ 0.35 0.70 ~ 1.00 ≤0.035 ≤0.035 ≤0.30 - 0.70 ~ 1.00 - - - SPS7 SUP11A 0.56 ~ 0.64 0.15 ~ 0.35 0.70 ~ 1.00 ≤0.035 ≤0.035 ≤0.30 - 0.70 ~ 1.00 - - - SPS8 SUP12 9254 54SiCr6 0.51 ~ 0.59 1.20 ~ 1.60 0.60 ~ 0.90 ≤0.035 ≤.035 ≤0.03 - 0.60 ~ 0.90 - - - 내열강 STR3 SUH3 0.35 ~ 0.45 1.80 ~ 2.50 ≤0.60 ≤0.030 ≤0.030 ≤0.30 ≤0.60 10.00 ~ 12.00 0.70 ~ 1.30 - - STR11 SUH11 0.45 ~ 0.55 1.00 ~ 2.00 ≤0.30 ≤0.030 ≤0.030 ≤0.30 ≤0.60 7.50 ~ 9.50 - - - STR36 SUH36 0.48 ~ 0.58 ≤0.35 8.00 ~ 10.00 ≤0.040 0.040 ~ 0.090 - 3.25 ~ 4.50 20.00 ~ 22.00 - - -