Precision Steel Strips for the Automobile and General Engineering Industry

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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

SPECN. PARAMETER	OUR SPECIFICATION
Other Specification
Camber	10 mm Max / 2.0 meters
Oscillated Coil ID	300 - 400 mm
Coil ID
Coil Weight	6.0 Kg / mm width max.
Oscillated Coil Weight	450 - 1250 Kgs
Pallet Weight	2.0 MT Max
Packing	"DLP" (VCI / Rusto Paper + PVC / LLDPE + Alkathene Lined Hessian / HDPE (Seaworthy Packing)

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