카본 스틸

카본 스틸 개요

Classification Type Chemical composition
C SI Mn P S Cu Ni Cr Ni+Cr
Carbon tool
steel
SK2M 1.10~1.3 0.35MAX 0.5MAX 0.03MAX 0.03MAX 0.25MAX 0.25MAX 0.3MAX
SK3M 1.00~1.1 0.35MAX 0.5MAX 0.03MAX 0.03MAX 0.25MAX 0.25MAX 0.3MAX
SK4M 0.9~1.0 0.35MAX 0.5MAX 0.03MAX 0.03MAX 0.25MAX 0.25MAX 0.3MAX
SK5M 0.8~0.9 0.35MAX 0.5MAX 0.03MAX 0.03MAX 0.25MAX 0.25MAX 0.3MAX
SK6M 0.70~0.8 0.35MAX 0.5MAX 0.03MAX 0.03MAX 0.25MAX 0.25MAX 0.3MAX
SK7M 0.60~0.7 0.35MAX 0.5MAX 0.03MAX 0.03MAX 0.25MAX 0.25MAX 0.3MAX
Carbon steel S30CM 0.27~0.35 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX 0.35MAX
S35CM 0.32~0.38 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX 0.35MAX
S45CM 0.42~0.48 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX 0.35MAX
S50CM 0.47~0.53 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX 0.35MAX
S55CM 0.52~0.58 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX 0.35MAX
S60CM 0.55~0.65 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX -
S65CM 0.60~0.70 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX -
S70CM 0.65~0.75 0.15~0.35 0.60~0.9 0.03MAX 0.035MAX 0.3MAX 0.2MAX 0.2MAX -

APPLICATION

S45CM Clutch part, Machine part 클러치 부품, 체인부품
S50CM Spring 스프링
S55CM Machine part 기계부품
S60CM Chain part, woodwork supplies, Blind 체인부품, 목공용품, 브라인더
S65CM Spring, Clutch part 스프링, 클러치 부품
S70CM Washer, Saw , Spring 와샤, 톱, 스프링
SK2M Saw, Spring, Camera shutter 톱, 스프링, 카메라 셧트
SK3M Saw, Spring, knife 톱, 스프링, 칼
SK4M Spring, Gage, Saw, Needle 팬꽂이, 스프링, 게이지, 톱, 편직기 바늘
SK5M Spring, Saw, Needle 스프링, 톱, 편직기 바늘
SK6M Spring, Saw, Clutch part, Washer 2. Carbon steel 스프링, 톱, 클러치 부품, 와샤 2. 탄소강

MECHANICAL PROPERTY

Symbol of temper A S R QT
Classification Annealed Skin passed Roiled Quenching & Tempered
Type Hardness (Hv) Tensile Strength (kgf/mm2) Tensile Strength (kgf/mm2) Hardness (Hv) Hardness (Hv) Hardness (Hv) Tensile Strength (kgf/mm2)
SK2M 180-220 60-70 15Max 220Max 220-280 350-850 112-∞
SK3M 180-220 60-70 15Max 220Max 220-280 350-850 112-∞
SK4M 180-200 50-70 20Max 210Max 210-270 350-700 112-∞
SK5M 170-200 50-70 20Max 210Max 210-270 350-700 112-∞
SK6M 170-190 50-65 25Max 200Max 200-260 350-700 112-∞
SK7M 150-190 50-60 25Max 200Max 220-260 350-700 112-∞

SURFACE FINISH

Surface Finish Remarks
Standard Color(Dark-Blue) Heat Treatment
White Color Grinding After Heat Treatment
Blue or Yellow Color Coloring AfterGrinding