Precision Steel Strips for the Automobile and General Engineering Industry

C R Strips -Range

Thickness

Mild Steel Medium/High Carbon Over All Capability
Over All Capability Min Max Min Max Min Max
Annealed 0.10 5.00 0.20 4.00 0.050 5.00
Skin Passed 0.15 4.00 0.15 3.50
Quarter Hard (QH) 0.15 3.00 0.20 3.00
Half Hard (HH) 0.15 3.00 0.20 2.50
Full Hard (FH) 0.05 3.50 0.20 2.50

Size

Grade MILD STEEL Medium/High Carbon HRPO & HRGC
Thickness 0.05 to 5.00 mm 0.20 to 4.00 mm 2.00 to 9.00 mm
Width 5 mm to 1230 mm 5 mm to 550 mm 50.00 mm to 1250 mm
Length 400 to 3000 mm 400 to 3000 mm 400 to 3000 mm

Surface Finish

Types of Surface Finish Rolling Properties
Smooth Surface (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
Mirror Finish Final Cold Rolled with Specially prepared Mirror Surface Rolls 0.15 – 0.25 µm Ra
Coil ID Min Max
mm 150 508
Inch 6″ 20″

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
Mild
Steel
C 75 0.70-0.80 0.60-0.85 0.030 0.030 0.35 max C 75S DIN
EN 10132-4
C 80 0.75 -0.85 0.60 -0.90 0.030 0.030 0.35 max C 85S DIN
EN 10132-4
C 98 0.90 -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 the presence of residual/tramp elements (Such as Cr, Ni, Cu, Mo etc.) Up to 0.20% and AL Up to 0.07%
    • In the MC & HC grades the percentage of Si and Al will depend on the deoxidation practice adopted by the steelmakers.
    • 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.