Product > Product Specification > Chemical Composition
Chemical Composition
CHEMICAL COMPOSITION
STEEL
GRADE
APPLIACTION STEEL SYMBOL CHEMICAL COMPOSITION
KS JIS DIN AISI(SEA) C Si Mn P S Cu Ni Cr Ni+Cr Mo V
LOW
CARBON
STEEL
Machinery
parts
SPCC SPCC ST12 A366(1012) 0.120
Max
- 0.500
Max
0.040
Max
0.045
Max
- - - - - -
SPCD SPCD ST13 A619(1008) 0.100
Max
- 0.450
Max
0.035
Max
0.035
Max
- - - - - -
SPCE SPCE ST14 A620(1008) 0.080
Max
- 0.400
Max
0.030
Max
0.030
Max
- - - - - -
MEDIUM
CARBON
STEEL
Retainers,
Friction plates,
Office-equipment
parts,
Clutch parts,
Chain parts,
Washers
SM30C S30C CK30 1030 0.27
~0.33
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
0.350
Max
- -
SM35C S35C CK35 1035 0.32
~0.38
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
0.350
Max
- -
SM45C S45C CK40 1045 0.42
~0.48
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
0.350
Max
- -
HIGH
CARBON
STEEL
Measuring,
Structureal parts for
cameras,
Chain parts,
Spring,
Clutch parts,
Washers,
Safety buckles,
Safety shoes,
Can openers,
Hand Saws woodworking,
Thompson blades,
Washers,
Office-equipment
parts
SM50C S50C CK50 1050 0.47
~0.53
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
0.350
Max
- -
SM55C S55C CK55 1055 0.52
~0.58
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
0.350
Max
- -
SM60C S60C CK60 1060 0.55
~0.65
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
- - -
SM65C S65C CK65 1065 0.60
~0.70
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
- - -
SM70C S70C CK70 1070 0.65
~0.75
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
- - -
SM75C S75C CK75 1075 0.70
~0.80
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
- - -
SM80C S80C CK80 1080 0.75
~0.85
0.15
~0.35
0.60
~0.90
0.030
Max
0.035
Max
0.300
Max
0.200
Max
0.200
Max
- - -
CARBON
TOOL
STEEL
STRIP
Razor blade,
Cutlery,
Spring,
Knitting needles,
Measuring,
Gauges,
Hack saws,
Pen points,
Round Saw,
Band Saw,
Clutch parts,
Office-equipment
parts
STC2 SK2   W1-111/2 1.10
~1.30
0.350
Max
0.500
Max
0.030
Max
0.030
Max
0.250
Max
0.250
Max
0.200
Max
- - -
STC3 SK3   W1-101/2 1.00
~1.10
0.350
Max
0.500
Max
0.030
Max
0.030
Max
0.250
Max
0.250
Max
0.200
Max
- - -
STC4 SK4   W1,W2-91/2 0.90
~1.00
0.350
Max
0.500
Max
0.030
Max
0.030
Max
0.250
Max
0.250
Max
0.200
Max
- - -
STC5 SK5   W1,W2-81/2 0.80
~0.90
0.350
Max
0.500
Max
0.030
Max
0.030
Max
0.250
Max
0.250
Max
0.200
Max
- - -
ALLOY
TOOL
STEEL
STRIP
Doctor blade,
Cutlery,
Round Saw,
Band Saw for woodworking
and lumbering
STS5 SKS5     0.75
~0.85
0.350
Max
0.500
Max
0.030
Max
0.030
Max
0.250
Max
0.70
~1.30
0.20
~0.50
- - -
STS51 SKS51   L6 0.75
~0.85
0.350
Max
0.500
Max
0.030
Max
0.030
Max
0.250
Max
1.30
~2.00
0.20
~0.50
- - -
CHROMIUM
MOLYBDENUM
STEEL
STRIP
Chain parts,
Office-equipment
parts,  
Thompson blades
SCM420 SCM420     0.27
~0.37
0.15
~0.35
0.60
~0.85
0.030
Max
0.030
Max
0.300
Max
0.250
Max
0.90
~1.20
- 0.15
~0.30
-
SCM435 SCM435   4135 0.33
~0.38
0.15
~0.35
0.60
~0.85
0.030
Max
0.030
Max
0.300
Max
0.250
Max
0.90
~1.20
- 0.15
~0.30
-
SCM440 SCM440     0.38
~0.43
0.15
~0.35
0.60
~0.85
0.030
Max
0.030
Max
0.300
Max
0.250
Max
0.90
~1.20
- 0.15
~0.30
-
SPRING
STEEL
Spring    SPS6 SUP10 50CRV4 6150 0.47
~0.55
0.15
~0.35
0.65
~0.95
0.035
Max
0.035
Max
0.350
Max
- 0.80
~1.10
- - 0.15
~0.25
STAINLESS STEEL
STEEL
GRADE
STEEL
SYMBOL
APPLIACTION CHEMICAL COMPOSITION(%) MECHANICAL PROPERTIES
C Si Mn P S Cr Ni Mo YS
(N/mm²)
TS
(N/mm²)
EL
(%)
Hv
STAINLESS
STEEL
301 Train,
Auto-Parts,
Spring
≤0.15 ≤1.0 ≤2.0 ≤0.045 ≤0.030 16.0
~18.0
6.0
~8.0
- ≤205 ≤520 ≥40 ≤218
304 Electronic Parts,
Auto Parts,
precision Parts
≤0.08 ≤1.0 ≤2.0 ≤0.045 ≤0.030 18.0∼20.0 8.0∼10.5 - ≥205 ≥520 ≥40 ≤200
304L ≤0.03 ≤1.0 ≤2.0 ≤0.045 ≤0.030 18.0∼20.0 9.0∼13.0 - ≥175 ≥480 ≥40 ≤200
305 Electronic Gun,
VTR Guide
≤0.12 ≤1.0 ≤2.0 ≤0.045 ≤0.030 17.0
~19.0
10.5∼13.0 - ≥175 ≥480 ≥40 ≤200
316 Chemical ≤0.08 ≤1.0 ≤2.0 ≤0.045 ≤0.030 16.0
~18.0
10.0∼14.0 2
~3
≥205 ≥520 ≥40 ≤200
316L ≤0.03 ≤1.0 ≤2.0 ≤0.045 ≤0.030 16.0
~18.0
12.0∼15.0 2
~3
≥175 ≥480 ≥40 ≤200
308L Overlay
Plate for
Hardfacing
≤0.03 ≤0.75 ≤2.0 ≤0.045 ≤0.030 19.0
~21.0
10.0∼12.0 - ≥205 ≥515 ≥40 ≤200
309L ≤0.03 ≤0.75 ≤2.0 ≤0.045 ≤0.030 22.0
~24.0
12.0∼15.0 - ≥205 ≥520 ≥40 ≤210
430 Home
Aplicance
≤0.12 ≤0.75 ≤1.0 ≤0.040 ≤0.030 16.0
~18.0
≤0.6 - ≥205 ≥450 ≥22 ≤200
420J2 Knife,
Valve,
Measuring Tape 
0.26
~0.40
≤1.0 ≤1.0 ≤0.060 ≤0.030 12.0∼14.0 ≤0.6 - ≥225 ≥540 ≥18 ≤247
409L Exhaust
System
≤0.03 ≤1.0 ≤1.0 ≤0.040 ≤0.030 10.5∼11.75 ≤0.6 - ≥175 ≥360 ≥25 ≤175
440 Razor,
Cutter,
Surgical Blade
0.6
~1.2
≤1.0 ≤1.0 ≤0.040 ≤0.030 16.0∼18.0 ≤0.6 ≤0.75 ≥245 ≥590 ≥15 ≤269
AVAILABLE SIZE : Thickness(0.02mm~3.5mm / Width(0.4mm~680mm)

Company dosko co.,ltd | Representation Cho, Sungdae| Business License 134-81-23737 | TEL +82 31-493-3131 | FAX +82 31-493-3060
ADD #15407, 84, Sinwon-ro 133beon-gil, Danwon-gu, Ansan-si, Gyeonggi-do, Korea | E-mail admin@dosko.co.kr
Copyrightsⓒ2017 dosko co.,ltd All rights reserved.