Cold Rolled Steel Coil

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Steel raw materials

Door frame

Door facade

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Cold Rolled steel

Product Description

Cold rolling is the term for high-precision stamping substrates. Through cold plastic deformation and controlled annealing processes, hot-rolled coils are transformed into "industrial-grade canvases" with thickness tolerance of ±0.01mm and surface roughness ranging from 0.4 to 3.2μm. As the top base material for galvanizing and color coating, it can meets the most stringent forming and surface treatment requirements.

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Product Details

Core process

Hot-rolled raw material coil → Pickling (hydrochloric acid) →Cold rolling (five-stand continuous rolling) →Annealing (continuous/induction) →Finishing (rolling and straightening) →Oil coating and winding

Product features

Material grade and application

Coating types and surface treatment methods

Available range

Chemical composition

Mechanical property

Product features

Features	Technical advantage	User value
Micrometer-level flatness	Thickness tolerance: ±0.01mm (e.g. 0.8±0.01mm)	The yield rate of precision stamping parts such as LCD back plates and mobile phone middle frames has increased by 25%
Micrometer-level flatness	Flatness≤5I-Units（EN 10139）
Customized surface	Matte surface(Ra 1.2-3.2μm):Optimize coating adhesion	Match the best surface architecture according to terminal requirements
Customized surface	Smooth surface (Ra 0.4-0.8μm) : Compatible with electroplating
Strength-forming balance	Annealed state: Yield strength 180-280MPa (elongation ≥40%)	One-stop solution for materials of automotive longitudinal beams (high-strength) vs. fuel tanks (deep drawing)
Strength-forming balance	Full hard state: Yield strength 550MPa
Super substrate compatibility	Grain size 7-9 grade (ASTM E112), coating adhesion increased by 30%	As a base material for GA-coated and color-coated steel sheets, it has passed the BMW VDA 6.3 certification
Green manufacturing	The closed-loop purification system for rolling oil has a carbon footprint 40% lower than that of hot rolling	Meet the carbon neutrality requirements of the supply chains of enterprises such as Tesla and Apple

As a premium cold rolled steel material supplier, Rosen provides a full range of cold rolled steel products, including cold-rolled steel sheet, cold rolled steel plate, and cold rolled steel coil, designed for industries with strict requirements on dimensional accuracy and surface quality. Our Cold Rolled Steel Coil Supplier capabilities allow us to deliver stable batches with consistent mechanical properties, making them ideal substrates for galvanizing, galvannealed processing, and color coating systems.

With excellent formability and surface cleanliness, Rosen’s High Strength Cold Rolled Steel is widely used in automotive structural parts, home appliances, precision stamping components, and electronic housings. As an experienced Galvanized Steel Supplier, we ensure seamless compatibility between cold rolled steel coil and downstream coating processes, helping customers reduce defects, improve coating adhesion, and enhance overall production efficiency.

By combining precise rolling control, flexible surface options, and reliable supply, Rosen supports global customers in achieving higher yield rates, lower processing costs, and long-term performance advantages across a wide range of cold rolled steel applications.

Material grade and application

Grade	Material grade	Feature	Application
SPCC, BLC, DC01	bending and forming grade （general commercial use）	low carbon steel	for general shaping and processing
SPCD, BLD, DC03	used for drawing	low carbon steel or interstitial free steel	for drawing and shaping process
SPCE, BUSD, DC04	used for deep drawing	low carbon steel or interstitial free steel	for deep drawing and shaping process
SPCF, BUFD, DC05	used for special deep drawing	interstitial free steel	for specail deep drawing and shaping process
SPCG BSUFD, DC06	used for extra deep drawing		for extra deep drawing and shaping process
DC07	used for special extra-deep drawing		for particularly good deep drawing property

Coating types and surface treatment methods

Classification	Category	Code
Surface structure	mirror Finish	G
	bright finish	B
	matte finish	D
Surface treatment	oiling	O
Surface treatment	unprocessed	U

Available range

Classification	Status	Nominal dimension
Thickness	cold rolled base metal	0.40～3.0mm
Width	steel strip, steel coil	800～2040mm
Length	steel plate	1000～6000mm
Inside diameter	steel strip, steel coil	610 or 508mm
Delivery time	for stock	10days
Delivery time	for custom	45～60days

Chemical composition

Grade	Chemical composition (heat analysis) % (mass fraction) no more than
Grade	C	Mn	P	S	Tia
SPCC, BLC, DC01	0.100	0.60	0.045	0.045	—
SPCD, BLD, DC03	0.080	0.45	0.035	0.035	—
SPCE, BUSD, DC04	0.010	0.40	0.030	0.030	—
SPCF, BUFD, DC05	0.008	0.30	0.020	0.020	0.20
SPCG BSUFD, DC06	0.006	0.30	0.020	0.020	0.20
DC07	0.006	0.25	0.020	0.020	0.20

Mechanical property

Grade	Tensile test
	Yield strength MPa	Tensile strength MPa	Elongation A80mm% no less than						r90 no less than	n90 no less than
	Yield strength MPa	Tensile strength MPa	＜0.30mm	0.30～＜0.50mm	0.50～＜0.70mm	0.70～＜1.0mm	1.0～＜1.6mm	≥1.6mm	r90 no less than	n90 no less than
SPCC, BLC, DC01	—	270～410	24	26	28	30	32	34	—	—
SPCD, BLD, DC03	140～220	270～370	—	30	32	34	35	36	1.3	—
SPCE, BUSD, DC04	130～200	270～350	—	34	36	38	39	40	1.6	0.18
SPCF, BUFD, DC05	120～190	270～330	—	35	38	40	40	41	1.9	0.20
SPCG BSUFD, DC06	110～180	260～330	—	37	39	41	42	43	2.1	0.22
DC07	100～150	250～310	—	40	42	44			2.5	0.23

Typical applications

Automotive industry

Electronic packaging

Home appliance excellence

Architectural aesthetics

Product advantage

Ultra-precision substrate for high-end forming applications

As a professional cold rolled steel material supplier, we deliver cold-rolled steel sheet and cold rolled steel plate with thickness tolerance controlled within ±0.01 mm and flatness ≤5 I-Units (EN 10139). This micrometer-level precision significantly improves forming consistency, making our cold rolled steel products ideal for precision stamping parts such as automotive inner panels, electronic enclosures, and LCD back plates. Customers benefit from higher dimensional stability, reduced rework rates, and improved overall yield.

Optimized surface architecture for coating and electroplating

Our cold rolled steel coil is available with customized surface roughness ranging from Ra 0.4 to 3.2 μm, allowing users to select the most suitable surface condition for downstream processes. Matte cold-rolled steel sheet enhances paint and coating adhesion, while smooth surfaces are fully compatible with electroplating and decorative finishing. As a reliable Cold Rolled Steel Coil Supplier, we help customers achieve superior surface appearance and long-term coating durability.

Balanced strength and formability for diverse structural needs

Rosen offers both annealed and full-hard High Strength Cold Rolled Steel, with yield strength ranging from 180 MPa to 550 MPa and elongation up to 40%. This wide performance window enables a single cold rolled steel plate platform to meet multiple requirements—from deep drawing applications such as fuel tanks to high-strength components like automotive reinforcement beams—reducing material switching costs and simplifying supply chain management.

Superior compatibility with galvanizing and color coating systems

With uniform grain size (ASTM E112 Grade 7–9) and excellent surface cleanliness, our cold rolled steel coil serves as an ideal base material for galvannealed, galvanized, and color-coated steel. As an experienced cold rolled steel material supplier, we ensure enhanced coating adhesion and stable processing performance, helping downstream users minimize coating defects and achieve consistent quality across high-volume production lines.