Deep Drawing vs. Bending vs. Roll Forming: Choosing the Right CR Steel Grade for Your Process

The right CR steel grade depends on what your factory plans to do with the sheet. 

A simple bracket may only require a few bends. An appliance casing may need the sheet to be pressed into a deeper shape. A channel or long profile may pass through several rollers before reaching its final form. 

These processes do not place the same demand on cold rolled steel. Choosing the grade according to the manufacturing process can reduce cracks, uneven shapes, material waste, and production delays. 

Before comparing cold rolled steel grades, look at the final component and ask: 

• Does the sheet only need a few simple bends? 

• Will it be pressed into a deep or complex shape? 

• Will it pass through rollers to create a long profile? 

• Does the finished component require a clean, visible surface? 

• Have similar components cracked or lost their shape during production? 

The answers will help you narrow the choice between CQ, DQ, DDQ, EDD and IF, the Tata Steelium catalogue names used on DigECA. 

Tata Steelium catalogue grade	General forming requirement	Common process fit
CQ	Basic forming	Simple bending and straightforward roll-formed profiles
DQ	Moderate forming	Standard drawing, tighter bending and more detailed profiles
DDQ	Deep drawing	Deeper and more complex pressed components
EDD	Extra-deep drawing	Difficult shapes and multiple forming stages
IF	Highly demanding forming	Intricate components that require very high formability

 

This table provides a starting point. The final grade should also be checked against the component design, thickness, dimensions and production setup. 

IS 513 (Part 1):2016 covers cold-reduced carbon steel sheets and strips intended for cold forming and drawing. BIS product manual for IS 513 Part 1 

Deep drawing uses a press to turn a flat sheet into a deeper three-dimensional component. Examples can include appliance housings, automotive parts, containers and electrical enclosures. 

The deeper and more complex the shape, the more easily the steel must stretch without cracking or becoming too thin. 

DQ may be suitable for moderate drawing. DDQ is commonly considered for deeper shapes. EDD and IF may be required when the component has difficult curves, significant depth or several forming stages. 

When choosing cold rolled steel for deep drawing, consider: 

• How deep the final component will be 

• Whether the component has tight corners 

• How much the sheet must stretch 

• Whether forming happens in one or several stages 

• Whether previous production trials caused cracks or wrinkles 

A higher grade may offer better formability, but it should be selected only when the component requires it. A simple pressed part may not need EDD or IF. 

Grades Commonly Considered 

• Moderate drawing: DQ 

• Deep drawing: DDQ 

• Severe or multi-stage drawing: EDD or IF 

The final choice should be confirmed with the production team or a technical expert. 

 

Bending is used for brackets, cabinets, electrical panels, shelves, furniture parts and other components made with straight folds. 

CQ can suit many simple bending jobs. DQ may be considered when the sheet requires tighter bends, several folds or more consistent forming across a large production run. 

When selecting cold rolled steel for bending, check: 

• Sheet thickness 

• Required bend angle 

• Tightness of the bend 

• Number of bends in the component 

• Condition of the sheet edges 

• Amount of springback after bending 

Springback occurs when the sheet partly returns towards its original shape after the bending force is removed. This can affect the final angle and dimensions. 

Cracks do not always mean that the steel grade is wrong. Damaged edges, unsuitable tools or a bend that is too tight can also cause failure. These factors should be checked before moving to a more expensive grade. 

Grades Commonly Considered 

• Simple bends: CQ 

• Tighter or repeated bends: DQ 

If the part combines bending with deeper pressing, the grade should be selected according to the more demanding operation. 

Roll forming creates long components with the same shape throughout their length. The steel strip passes through several rollers, with each roller gradually moving it closer to the required profile. 

Common applications include channels, shelving components, furniture profiles, panel frames and long engineering sections. 

For roll forming, the steel must behave consistently throughout the production run. Changes in sheet thickness, hardness or flatness can lead to twisted, curved or uneven profiles. 

When evaluating cold rolled steel for roll forming, buyers should consider: 

• Complexity of the final profile 

• Number of bends in the section 

• Tightness of the bends 

• Required thickness and width 

• Flatness of the sheet or coil 

• Consistency between one coil and the next 

CQ may suit simple, open profiles. DQ may be preferred when the profile includes tighter bends or more detailed shapes. 

Grades Commonly Considered 

• Straightforward profiles: CQ 

• Profiles with tighter bends or greater complexity: DQ 

For specialised or high-strength profiles, the requirement should be reviewed separately instead of relying only on this general grade sequence. 

If you are making	Process involved	Grade direction to explore
A basic bracket or cabinet	Simple bending	CQ
A panel with several tight folds	More demanding bending	DQ
A moderately pressed casing	Standard drawing	DQ
A deep appliance or auto component	Deep drawing	DDQ
A highly complex pressed part	Severe drawing	EDD or IF
A simple channel or profile	Roll forming	CQ
A detailed profile with several bends	More demanding roll forming	DQ

These are general directions, not automatic specifications. Component drawings and production requirements should guide the final decision. 

Production problems can come from the steel, the machine or the tooling.

Production problem	Possible material issue	Other possible cause
Sheet cracks during pressing	Grade may lack sufficient formability	Tooling, lubrication or shape may be unsuitable
Cracks appear around a bend	Material may be too hard for the bend	Bend may be too tight or the edge may be damaged
Final angle changes after bending	Excessive springback	Machine settings may require adjustment
Roll-formed section becomes uneven	Thickness or properties may be inconsistent	Rollers may be misaligned
Drawn part develops wrinkles	Grade may not suit the shape	Press settings may need correction

 

Before changing the material, check whether the same problem appears consistently and whether the equipment and tools are set correctly.

A request that only says “CR sheet required” does not provide enough information to identify the right product. 

Share the following details: 

• Component being manufactured 

• Bending, deep drawing or roll-forming process 

• Preferred catalogue grade, if known 

• Required thickness and width 

• Sheet or coil requirement 

• Quantity 

• Surface-finish requirement 

• Delivery location 

• Any production problem already encountered 

This information gives the supplier or technical team a clearer picture of the requirements. 

Tata Steelium cold rolled sheets and coils serve auto ancillaries, panels, appliances, furniture, packaging and general engineering applications. Tata Steel lists consistent mechanical properties, flatness, thickness, cleanliness, surface finish, formability and weldability among the range’s benefits. Tata Steelium product information 

MSMEs looking to buy cold rolled steel MSME online can share their requirements through DigECA. The Tata Steelium range is listed using catalogue grades such as CQ, DQ, DDQ, EDD and IF. 

If the grade is unclear, buyers can use Ask an Expert to explain their component and production process before placing the requirement. 

Which CR steel grade is suitable for deep drawing? 

DDQ is commonly considered for deep drawing. EDD and IF may be required for components with greater depth or more complex shapes. 

Can CQ steel be used for bending? 

CQ may suit simple bends. DQ may be considered for tighter bends, repeated folds or components that require greater forming consistency. 

Which CR grade is suitable for roll forming? 

CQ may suit basic profiles, while DQ may be used for profiles with tighter bends or greater complexity. The final selection should also consider thickness, flatness and the production setup. 

Should I always choose a higher grade for better results? 

No. A higher grade may add cost without improving a simple component. The grade should match the actual forming requirement.