Precision Steel Strips for the Automobile and General Engineering Industry

 
Steel Strips Steel Strips Steel Strips
 

C R Strips - Size Range Thickness

Mild Steel Medium / High Carbon
Overall Capability   Min Max Overall Capability Min Max
Annealed 0.05 3.50 0.10 3.00
Skin Passed 0.10 3.50
Quarter Hard (QH) 0.15 3.00
Half Hard (HH) 0.15 3.00
Full Hard (FH) 0.15 3.50
Full Hard (FH) 0.15 2.80

Surface Finish

Types of Surface Finish Rolling Properties
SmoothSurface (Regular Rolled Finish) Final Cold Rolled with normal ground rolls without any special treatment. Max. 0.60 µm Ra
Matt Surface Final Cold Rolled with specially prepared matt surface rolls. 0.60 - 1.20 µm Ra

Width

Mild Steel Medium & High Carbon Steel
  Min Max   Min Max
Mill Edge width     Mill Edge width    
Thk 0.30 mm & below   312 mm Thk 0.40 mm & below   315 mm
Thk above 0.30 mm   460 mm Thk 0.40 mm- 3.0mm   400 mm (for MC)
          350 mm (for HC)
Slit Edge Overall 6 mm 450 mm Slit Edge Overall 6 mm 450 mm
  (T/W Ratio of 1:10)   (T/W Ratio of 1:10)

Cut Length

Grade MILD STEEL (Soft)
Thickness 0.40 to 3.00 mm
Width 150 to 450 mm
Length 750 to 3000 mm

Coil Weight (Specific Coil wt. kg/mm width)

Mild Steel Medium / High Carbon
  Min Max   Min Max
Normal 0.50 5.00 Normal 0.50 5.00
Specific sizes with prior discussion 0.50 7.50 Specific sizes with prior discussion 0.50 7.50
Thk 0.25 mm & below 0.50 2.00 Thk 0.25 mm & below 0.50 2.00

Coil Inner Diameter

Available Coil ID :

6" (150 mm), 12" (300 mm)

16" (400 mm), 18" (450 mm) and 20" (500 mm)

depending upon the strip size and specific coil weight.

 

Following are exceptions.

  • For thickness above 0.30 mm and width above 315 mm : 6" (150 mm) cannot be given,
  • For Mill Edge and Annealed (non-skin passed) : 20" (500) cannot be given.
  • For Skin Passed Mill Edge : Only 20" (500 mm) can be given.
 

Edge Conditions

Types of Edge Remarks
Mill Edge Is a natural mill edge carried through the cold rolling without additional processing of the edge.
Slit Edge Is an approximately square edge produced by slitting by slitting without any further treatment on the edge.

Range Of Sizes

 

Chemical Composition of the Product Range

Category Grade
Designation
Chemical Composition (% w/w) Nearest Equivalent Specification
C Mn S Max P Max Si AL Cr Other
Mild
Steel
D 0.12 max 0.50 max 0.040 0.040 Traces       DC 01 DIN
EN 10139
AISI 1010 0.08-0.13 0.30-0.50 0.040 0.040 Traces       C 10 E DIN
EN 10132-2
DD 0.10 max 0.45 max 0.040 0.040 Traces 0.020 -0.070     DC 03 DIN
EN 10139
EDD 0.08 max 0.30 max 0.025 0.025 Traces 0.020 -0.070   N:0.007 max DC 04 DIN
EN 10139
Medium Carbon Steel C 40 0.35 -0.45 0.50 -0.90 0.040 0.040 0.35 max       C 40E DIN
EN 10132-3
C 45 0.42 - 0.48 0.60 - 0.90 0.040 0.040 0.35 max       C 45E DIN
EN 10132-3
C 55 0.50 - 0.60 0.60 - 0.90 0.040 0.040 0.35 max       C 55E DIN
EN 10132-3
C 62 0.60 - 0.67 0.50 - 0.90 0.035 0.035 0.35 max       C 60E DIN
EN 10132-3

Chemical Composition of the Product Range

Category Grade
Designation
Chemical Composition (% w/w) Nearest Equivalent Specification
  C Mn S Max P Max Si AL Cr Other
Mild
Steel
C 75 0.70 - 0.85 0.60 -
0.85
0.030 0.030 0.35 max       C 75S DIN
EN 10132-4
C 80 0.90 -1.05 0.60 -0.90 0.030 0.030 0.35 max       C 85S DIN
EN 10132-4
C 98 0.47 -1.05 0.30 -0.60 0.030 0.030 0.15-0.35       C 100S DIN
EN 10132-4
Low Alloy
Steel
50 Cr V4 0.47 -0.55 0.70 -1.10 0.035 0.035 0.15-0.35   0.90 -1.20 V:0.10 - 0.20 51 Cr V4 DIN
EN 10132-4
125Cr 1 1.20 -1.30 0.25 -0.60 0.030 0.035 0.35 max       125 Cr 2 DIN
EN 10132-4

Note

  • In the MS grades, there may be presence of residual/tramp elements (Such as Cr, Ni, Cu, Mo etc.) Upto 0.20% and AL Upto 0.07%
  • In the MC & HC grades the percentage of Si and Al will depend on the deoxidation practice adopted by the steel makers.
  • In MC & HC grades residual/tramp elements (Such as Cr, Ni, Cu, Mo etc.) may be present depending upon the steel making practice followed by the steel makers.
 

Some of the Typical Applications of CR Strips manufactured by us.

Category Grade Application

Mild Stees

D / DD
AISI 1010
Automotive components, Car door / window biddings and trims, Lamps holders / caps, Dry cell Battery caps, Safety pins, Flash light components Bimetal Bearings & bushes, Shims
  EDD Ball and Taper Roller Bearing retainers, Textile machinery components, Auto parts, Deep Drawn components for Electronic Industry, Flux cored Electrodes, Fashion Buttons for garments etc.
Medium Carbon Steel C-40, C-45
C-55, C-62
Transmission Chains for two wheelers, Industrial Chains, Hair Pins, Pen Clips, Rifle and Gun components, Springs and Springs washers, Drop wires and Healds for weaving industry, Clutch parts, Fasteners etc
High Carbon Steel C-75, C-80 C-98 Springs, Dowel pins, Hand & machine hacksaw blades, Hom Diaphragms, Measuring tapes, Healds, knitting needles, Knives and cutting blades, Circular Saws, Auto components, etc.
Alloy Steels 50 Cr V4 Disc and Diaphragm Springs, Auto components for high wear resistance etc.
 
  Indian Japanese American German Customer
Commercial IS : 513
0
JIS G 3141
SPCC
A 366 DIN 1623
St 12
  As Per your specs
Drawing IS : 513
D
JIS G 3141
SPCC
A 366 DIN 1623
St 12
Deep Drawing IS : 513
DD
JIS G 3141
SPCD
A 619 DIN 1623
St 13
Extra Deep
Drawing
IS : 513
EDD
JIS G 3141
SPCE
SPCE-N
A 620 DIN 1623
St 14
Note : Steel gradein
DIN 1623 Part 1
Comparable Steel
Euronorm 32-72
Grade in ISO-17/12 N 49
  St 12
St 13
St 14
Fe PO 1
Fe PO 2
Fe PO 3
CRO 1
CRO 2
CRO 4