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Cold Rolled Strip & Strapping

제품명
Cold Rolled Strip & Strapping
제조국
Cold Rolled Carbon Steel Strip
제조사
Cold Rolled Special Steel Strip
간단설명
Steel Strapping
특징4
Packing & Marking

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Cold Rolled Carbon Steel Strip

Characteristics


Cold rolled commercial quality steel is normally maximum carbon content's Limit of 0.15 percent by ladle analysis.
As the end usage of them are mainly for drawing, forming, and bending by pressing process, it is greatly required maximization of workability, precision of thickness and stability of shape, and also needed refined surface condition for plating or painting after processing.
Now we have completely installed all of inispensable facilities for various kinds of cold rolled steel strip.
Through continuous research and development, We can meet our customer's special requirements such as low yield steel strip, non earing steel strip which regarded as advanced field of cold rolles steel strip.
Accomplishment of merchandise of inner shield for T.V Brown tube and lead frames for intergrated circuits, which is the highest perfection of cold rolled steel strip make us to take the highest technical level up in the reputation and quality.
 

Mechanical Properties

Hardness & Tensile strength test

Classification Symbol Temper Grade Tensile Strength Hardness Bending test
Distinction of
refining
Symbol of refining Tensile trength
(kgf/mm2)
(Hv) Bending
Angle
Inside radius
Class 1 SCP 1 as annealed A 28 min 105 max 180° Close contact
skin passed S 28 min 115 max 180° Close contact
1/8 hard 1/8 H 30 ~ 42 95 ~ 130 180° Close contact
1/4 hard 1/4 H 38 ~ 50 115 ~ 150 180° Thickness x 0.5
1/2 hard 1/2 H 45 ~ 60 135 ~ 185 180° Thickness x 0.5
Full hard H 56 min 170 min - -
Class 2 SCP 2 skin passed
,annealed
S, A 28 min 110 min 180° Close contact
Class 3 SCP 3 skin passed
,annealed
S, A 28 min 110 min 180° Close contact

Remark : Tensile test applies to those whose thickness is 0.25mm up width is 30mm up.

Elongation test

Thickness(mm) Elongation(%) Test piece
Spec 0.25 ~ 0.40 0.40 ~ 0.60 0.60 ~ 1.0 1.0 ~ 1.6 1.6 ~ 2.5 2.5 min
SPCC (32 min) (34 min) (36 min) (37 min ) (38 min) (39 min) No.5,rolling
direction
SPCD 34 min 36 min 38 min 39 min 40 min 41 min
SPCE 36 min 38 min 40 min 41 min 42 min 43 min

Remark : SPCC is originally not applied to elongation test,but in case of customer's request,the figure of () is applied.

Erichsen test Unit : mm

Classification to thickness 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.4 1.6
Spec
Class 1 SCP 1 7.2 7.8 8.4 8.8 9.1 9.4 9.6 10.3 10.3 10.5
Class 2 SCP 2 7.6 8.2 8.8 9.2 9.5 9.8 10.0 10.7 10.7 10.9
Class 3 SCP 3 8.0 8.6 9.2 9.6 9.9 10.2 10.4 11.1 11.1 11.3

Remark :
1. Respecting to the products with intermediate thickness, not shown in the above table range from 0.4mm to 1.6mm, The value will be rounded out to nearest tenths for application.
2. Average values of 3 pieces test shall be taken.

Camber Unit : mm

Classification Standard Tol.(A) Special Tol.(S) Remark
Width As per 2,000 mm length
20 under - 16  
20 over 30 under - 12  
30 over 60 under 8 6  
60 over 4 3  

Remark : The camber tolerance for progressive die is according to individual discussion with customer.

Tolerance on Thickness & WidthUnit : mm

Thickness Tolerance on Thickness Tolerance on Width
Standard Standard
Width
160
Excl under
Width
160
and Over
Width
250
and Over
Width
400
Over
Width
160
Excl under
Width
160 and
Over
Width
250
and Over
Width
400
Over
0.10 over~0.16 excl under ±0.015 ±0.020 ±0.030 ±0.030 ±0.1 ±0.15 ±0.15 ±0.15
0.16 over~0.25 excl under ±0.020 ±0.025 ±0.035 ±0.035 ±.15 ±0.20 ±0.25 ±0.30
0.25 over~0.40 excl under ±0.025 ±0.030 ±0.040 ±0.045
0.40 over~0.60 excl under ±0.035 ±0.040 ±0.045 ±0.045
0.60 over~0.80 excl under ±0.040 ±0.045 ±0.050 ±0.050 ±0.20 ±0.25 ±0.25 ±0.30
0.80 over~1.00 excl under ±0.040 ±0.050 ±0.050 ±0.060
1.00 over~1.25 excl under ±0.050 ±0.050 ±0.060 ±0.060 ±0.20 ±0.30 ±0.30 ±0.40
1.25 over~1.60 excl under ±0.050 ±0.060 ±0.080 ±0.080
1.60 over~2.00 excl under ±0.060 ±0.070 ±0.080 ±0.090 ±0.25 ±0.35 ±0.40 ±0.50
2.00 over~2.50 excl under ±0.070 ±0.080 ±0.090 ±0.100
2.50 over~3.15 excl under ±0.080 ±0.090 ±0.100 ±0.110 ±0.30 ±0.40 ±0.45 ±0.50
3.15 over ±0.090 ±0.100    

Remark : 1.Steel Strip of more accurate thickness than above tolerance limit can be manufactured in accordance with customer's request.
2. Thickness check point must be on any points of 15mm and over from the edge. in case of 30mm under in which, it must be on center point of width.

 

Cold Rolled Special Steel Strip

Characteristics

Cold rolled special strip is named high carbon steel strip, which contents carbon 0.20~1.5% and special alloy steel included Mo, Mn, Cr, V, Ni.
Their main applications are suited for machine parts in need for improving fatigue limit by the heat treatment such as carburizing, quenching & tempering.
With control of chemical contents, non-metalic inlusion and spheroidizing, the manufacturing characteristics guarantee workability & Heat treatment ability required by customer. It should be sternly managed more than mild steel strip in gauge control system and flatness control system, which is essential to main uses of machine parts. Therefore we have changed 4Hi-Mill into 6Hi-Z-Mill for innovation of production process.

Tolerance on thickness

Thickness Standard ToI. Special ToI
Width 200 Excl Width 200 Over S SS
0.10 Over 0.15 Excl ±0.010 - ±0.008 ±0.005
0.15 Over 0.25 Excl ±0.015 ±0.020 ±0.010 ±0.008
0.25 Over 0.40 Excl ±0.020 ±0.025 ±0.015 ±0.010
0.40 Over 0.60 Excl ±0.025 ±0.030 ±0.020 ±0.010
0.60 Over 0.90 Excl ±0.030 ±0.040 ±0.020 ±0.015
0.90 Over 1.20 Excl ±0.040 ±0.050 ±0.030 ±0.020
1.20 Over 1.60 Excl ±0.050 ±0.060 ±0.040 ±0.030
1.60 Over 2.10 Excl ±0.055 ±0.070 ±0.040 ±0.030
2.10 Over 3.00 Excl ±0.065 ±0.080 ±0.050 ±0.040
3.00 Over 4.00 Excl ±0.080 ±0.090 ±0.065 ±0.050

Remark : 1. Thickness check point must be on any points of 10mm and over from the edge, in case of 20mm under in width, it must be on center point of width.
2. Steel strip of more accurate thickness than above tolerance limit can be manufactured in accordance with customer's request.

Tolerance on widthUnit : mm

Thickness Standard ToI. Special ToI.
Width 200 Excl Width 200 Over Width 200 Excl Width 200 Over
0.25 Over 0.60 Excl ±0.15 ±0.25 ±0.10 ±0.15
0.60 Over 1.20 Excl ±0.20 ±0.30 ±0.15 ±0.20
1.20 Over 4.00 Excl ±0.25 ±0.40 ±0.20 ±0.25

Remark : 1. Steel strip of more accurate width than above tolerance limit can be manufactured in accordance with customer's request.

Temper Grade

Distinection Temper Symbol Remark
Cold rolled R As cold reduced condition.
Annealing A Annealed after cold reduced.
Skin Passed S Skin passed after annealed.

Camber ToleranceUnit : mm

distinction Standard Tol. Special Tol. Remark
Width As per 2000 length
20 Excl under - 12  
20~40 Excl - 8  
40~80 Excl - 4  
80 and Over - 2  

Remark : 1. The camber tolerance of strip is indicated by deviation of the edge from straight line in a arbitary 2m section of the strip.

Mechanical Properties Applications

High Carbon(Tool)Steel Strip

Distinction of Refining A(Annealed) S R
Symbol Hardness Tensile Strength
(kgf/mm2)
Elongation
(%)
Hardness
(Hv)
Hardness
(Hv)
SK 2M 180 to 220 60 to 70 15Min 210Max 210 to 300
SK 3M 180 to 220 60 to 70 15Min 210Max 210 to 300
SK 4M 180 to 220 50 to 70 20Min 200Max 200 to 290
SK 5M 170 to 200 50 to 65 20Min 200Max 200 to 290
SK 6M 160 to 190 50 to 65 25Min 195Max 195 to 280
SK 7M 150 to 190 50 to 60 25Min 190Max 190 to 280

 

Carbon Steel Strip for Machine Structual use

Distinction of Refining A(Annealed) S R
Symbol Hardness
(Hv)
Tensile Strength
(kgf/mm2)
Elongation
(%)
Hardness
(Hv)
Hardness
(Hv)
S30CM 130 to 150 45Max 30Min 150Max 150 to 270
S35CM 130 to 150 45Max 27Min 150Max 150 to 270
S45CM 135 to 160 50Max 27Min 160Max 160 to 280
S50CM 135 to 160 50Max 27Min 160Max 160 to 280
S55CM 150 to 170 55Max 27Min 170Max 170 to 290
S60CM 150 to 170 55Max 25Min 170Max 170 to 290

 

Alloy Steel Strip

Kinds of Steel Symbol Hardness(Hv) Main Applications
Annealing Rolling
Spring Steel SUP 6M 200 Max 200 ~ 290   Spring
SUP 9M 200 Max 200 ~ 290   Special Spring
SUP 10M 200 Max 200 ~ 290   Special Spring
Manganese
Steel
SMn 420M 150Max 150 ~ 260   Parts for chain,Safety buckle
SMn 433M 160 Max 160 ~ 270   Parts for chain
Chromium
Molybdenum
Steel
SCM 415M 160Max 160 ~ 250   Parts for Typewriter,Parts for calculator
SCM 420M 170Max 170 ~ 260   Parts for chain
SCM 430M 180Max 180 ~ 270   Parts for chain,safety buckle
SCM 435M 190Max 190 ~ 280   Parts for chain,office machine
SCM 440M 200Max 200 ~ 290   Parts for chain,cutter

 

Chemical Composition

Division Symbol Chemical Composition(%) Main Application
C Si Mn P S Cu Ni Cr Ni + Cr Mo W V
Carbon
Steel
S30CM
0.27
~
0.33
0.15
~
0.35
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
0.35
Max
- - - Retainer
S35CM * 0.32
~
0.38
0.15
~
0.35
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
0.35
Max
- - - Office machinery parts
S45CM * 0.42
~
0.48
0.15
~
0.35
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
0.35
Max
- - - Clutch part,umbrella ribs,Retainer
S50CM * 0.47
~
0.53
0.15
~
0.35
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
0.35
Max
- - - components and parts of camera,chain parts,spring,umbrella ribs,clutch parts,washers
S55CM * 0.52
~
0.58
0.15
~
0.35
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
0.35
Max
- - - Spring,safety shoes,can openers,thompson blade,handsaw for woodworking
S60CM 0.55
~
0.65
0.15
~
0.30
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
- - - - Chain parts,handsaw for woodworking,blinds,safety shoes,office machinery parts,washer
S65CM * 0.60
~
0.70
0.15
~
0.30
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
- - - - Safety shoe parts,clutch parts,springs
S70CM * 0.65
~
0.75
0.15
~
0.30
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
- - - - Washer,handsaw for woodworking,springs
S75CM 0.70
~
0.80
0.15
~
0.30
0.60
~
0.90
0.030
Max
0.035
Max
0.30
Max
0.20
Max
0.20
Max
- - - - Clutch parts,springs
Carbon Tool
Steel
SK2M 1.10
~
1.30
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.30
Max
- - - - Razor blades,cutlery,hacksaws,shutters,spriral springs
SK3M 1.00
~
1.10
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.30
Max
- - - - Hacksaws,cutlery,springs
SK4M 0.90
~
1.00
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.30
Max
- - - - Pen nibs,sprial,gauges,springs cutlery,knitting needles
SK5M * 0.80
~
0.90
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.30
Max
- - - - Spiral springs,cutlery,knitting needles,gauges round saw,office machinery parts,clutch parts
SK6M 0.70
~
0.80
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.30
Max
- - - - Spings,cutlery,clutch parts,washers shoe steel shank,homs
SK7M 0.60
~
0.70
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.30
Max
- - - - Spings,cutlery,homs,handsaw for woodworking,shoe steel shank,clutch parts
Alloy Tool
Steel
SKS11M 1.20
~
1.30
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.20
~
0.50
- - 3.00
~
4.00
0.10
~
0.30
Band saw
SKS2M 1.00
~
1.10
0.35
Max
0.80
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.50
~
1.00
- - 1.00
~
1.50
0.20
Max
Band saw,hacksaw,cutlery
SKS7M 1.10
~
1.20
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.25
Max
0.20
~
0.50
- - 2.00
~
2.50
0.20
Max
Band saw,hacksaw,cutlery
SKS5M 0.75
~
0.85
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
0.70
~
1.30
0.20
~
0.50
- - - - Cutlery,circular saws for woodworking,bandsaws for woodworking and lumbering
SKS51M 0.75
~
0.85
0.35
Max
0.50
Max
0.030
Max
0.030
Max
0.25
Max
1.30
~
2.00
0.20
~
0.50
- - - - Cutlery,circular saws for woodworking,bandsaws for woodworking and lumbering
Nickel
Chromium
Steel
SNC631M 0.27
~
0.30
0.15
~
0.35
0.35
~
0.65
0.030
Max
0.030
Max
0.30
Max
2.50
~
3.00
0.60
~
1.00
- - - - Office machinery parts
SNC836M 0.32
~
0.40
0.15
~
0.35
0.35
~
0.65
0.030
Max
0.030
Max
0.30
Max
3.00
~
3.50
0.60
~
1.00
- - - - Office machinery parts
SNC415M 0.12
~
0.18
0.15
~
0.35
0.35
~
0.65
0.030
Max
0.030
Max
0.30
Max
2.00
~
2.50
0.20
~
0.50
- - - - Office machinery parts
Manganese
Steel
SMn420M * 0.17
~
0.23
0.15
~
0.35
1.20
~
1.50
0.030
Max
0.030
Max
0.30
Max
0.25
Max
(0.35
Max)
- - - - Chain parts
SMN433m * 0.30
~
0.36
0.15
~
0.35
1.20
~
1.50
0.030
Max
0.030
Max
0.30
Max
0.25
Max
(0.35
Max)
- - - - Safety buckles,chain parts
Chromium Molybdenum Steel SCM415M 0.13
~
0.18
0.15
~
0.35
0.60
~
0.85
0.030
Max
0.030
Max
0.30
Max
0.25
Max
0.90
~
1.20
- 0.15
~
0.30
- - Chain parts
SCM420M * 0.18
~
0.23
0.15
~
0.35
0.60
~
0.85
0.030
Max
0.030
Max
0.30
Max
0.25
Max
0.90
~
1.20
- 0.15
~
0.30
- - Chain parts,thompson blades
SCM430M * 0.28
~
0.33
0.15
~
0.35
0.60
~
0.85
0.030
Max
0.030
Max
0.30
Max
0.25
Max
0.90
~
1.20
- 0.15
~
0.30
- - Chain parts,Office machinery parts
SCM435M * 0.33
~
0.38
0.15
~
0.35
0.60
~
0.85
0.030
Max
0.030
Max
0.30
Max
0.25
Max
0.90
~
1.20
- 0.15
~
0.30
- - Chain parts,Office machinery parts
SCM440M 0.38
~
0.43
0.15
~
0.35
0.60
~
0.85
0.030
Max
0.035
Max
0.30
Max
0.25
Max
0.90
~
1.20
- 0.15
~
0.30
- - Chain parts,Office machinery parts
Sping Steel SUP6M 0.56
~
0.64
1.50
~
1.80
0.70
~
1.00
0.035
Max
0.035
Max
0.30
Max
- - - - - - Springs
SUP9M 0.52
~
0.60
0.15
~
0.35
0.65
~
0.95
0.035
Max
0.035
Max
0.30
Max
- 0.65
~
0.95
- - - - Special Springs
SUP10M * 0.47
~
0.55
0.15
~
0.35
0.65
~
0.95
0.035
Max
0.035
Max
0.30
Max
- 0.80
~
1.10
- - - 0.15
~
0.25
Special Springs
 

Steel Strapping

Characteristics

We are the biggest manufacturer in asia zone, and fulfil customer's demand with various kinds of product which is used for general purpose up to special purpose, especially, for the high quality, we have improved antirustability, & good appearence by coating way of blued, painted, zinc painted.

Our strappings are treated with smooth edge for customer's safe working.
We consider production efficiancy of customer side.
So that we developed 3type winding system from ribbon wound to mill wound and jumbo wound, also we will try our best to meet customer's request.

Spec.Tolerance

Classification Available range Remark
Thickness ±0.05,0.03mm According to discussion for tight range
Width ±0.127mm "
Camber 12.7/2400mm Max "
CURL 25.4/2400mm Max "
TWIST 30°/2400mm Max "

ASurface Classification

Symbol Surface Condition Antirustability(Nacl 5 %) Remark
B BLUED & WAXED - Surface coated temper color
P PAINTED & WAXED 16Hr Min Coating Thickness : 6±5µ
Z ZINC PAINTED & WAXED 56Hr min Coating Thickness:10±5µ

Winding Metrhod

Symbol WINDING CONDITION Winding width Remark
RW RIBBON WOUND According to width
or products
I.D:300φ(12"),400φ(16")
MW MILL WOUND
(OSCILLATED WOUND)
67±3mm I.D:400φ(16")
JW JUMBO WOUND 192±3mm I.D:400φ(16")

Grade for usage

- STANDARD STRAPPING : for package banding of Light weight products.
- Hi-TENSILE STRAPPING : for package banding or heavy weight such as pipe,thin gauge coil.
- SUPER GRADE STRAPPING : for package banding of Safety item, accurate parts,thicker gauge coil.

 

Mechanical Properties As Per Application Grade

GRADE THICKNESS
(mm)
T/S(kg/mm2) EL(%) Remark
MIN AVERAGE MIN AVERAGE
STANDARD
SBW
SPW
SZW
0.5 75 85 2 2-3   Tensil strength in part of
  seam welding guaranteed
  75 % of mothermaterial
0.6 75 83 2 2-4
0.7 75 82 2 3-5
0.8 73 80 2 4-6
0.9 73 78 4 5-7
1.0 73 78 4 7-8
Hi-TWNSILE
(non Heat
Treatment)
HBW(N)
HPW(N)
HZW(N)
0.5 90 105 2 2-3 "
0.6 90 100 2 2-4
0.7 90 95 2 3-5
0.8 90 93 2 4-6
0.9 85 90 5 5-7
1.0 85 87 5 7-8
Hi-TENSILE
HBW
HPW
HZW
0.5 85 87 5 5-7 "
0.6 85 87 6 7-8
0.7 85 87 6 7-9
0.8 85 87 6 7-9
0.9 85 87 6 9-10
1.0 85 87 6 9-10
SUPER 95
SUB 95
SUP 95
SUZ 95
0.5 95 100 7 7-8  
0.6 95 100 7 7-8
0.7 95 100 7 8-9
0.8 95 100 7 8-9
0.9 95 100 7 8-10
1.0 95 100 7 8-10
SUPER 120
SUB 120
SUP 120
SUZ 120
0.5 120 125 5 6-7    
0.6 120 125 5 6-7
0.7 120 125 5 6-7
0.8 120 125 5 6-7
0.9 120 125 5 6-7
1.0 1200 125 5 6-7
SUPER 140
SUB 140
SUP 140
SUZ 140
0.5 138 145 4 5-6  
0.6 138 145 4 5-6
0.7 138 145 4 5-6
0.8 138 145 4 5-6
0.9 138 145 4 5-6
1.0 138 145 4 5-6

Be applied to the 50mm gauge length of tensile test piece.

 

Self Locking

Self locking as high tensile strapping is produced by press, using steel strappings, and is locked by itself without using of clip locking and welding, it helf customer work efficiently in locking high volume like cotton & wool by itself, and is able to be cut in length as customers request.

Classification of product

Avaliable for the thickness 0.5 ~ 1.0 mm, width 19mm

Length Tolerance

Length Tolerance As per pcs. : ±5mm Max.

GRADE Symbol Tensile strength
(kg/mm2)
Banding part Tensile
Strength(kg/mm2)
STANDARD SELFLOCKING
(BLUED,PAINTED,ZINC coated)
SELF 1-1 75 min 62.3
Hi-TENSILE SELFLOCKING
(BLUED,PAINTED,ZINC coated)
SELF 1-2 85 min 70.5
SUPER SELFLOCKING
(BLUED,PAINTED,ZINC coated)
SELF 2-2 138 min 114.5
 

Packing & Marking