Huaxiao Metal is a specialist supplier of 304DQ (Drawing Quality) and 304DDQ (Deep Drawing Quality) cold-rolled coils. Unlike standard 304, our DQ/DDQ grades are engineered with a specific chemical balance—higher nickel content and controlled grain size—to ensure exceptional ductility and minimize “orange peel” effects during complex forming processes.
Our DDQ material is the industry standard for manufacturing deep-drawn kitchen sinks, thermoses, and automotive components. With thicknesses from 0.2mm to 8.0mm, we guarantee consistent mechanical properties that reduce crack rates and improve production efficiency in high-speed stamping and deep-drawing lines.
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304 DDQ Stainless Steel, 304 DQDDQ Cold Rolled Stainless Steel Coil(0.2mm-8mm) Supplier | Manufacturer | Exporter
As a supplier and manufacturer of 304 DDQ stainless steel coils, we adhere to strict quality control standards to ensure that each coil meets international standards and customer requirements. We have advanced production equipment and a technical team to meet customers’ needs for various specifications and requirements.
If you are looking for high-quality, reasonably priced 304 DDQ stainless steel coil suppliers and manufacturers, Huaxiao Metal will be your best choice. Welcome to contact us to learn more about stainless steel coils
Huaxiao Capacity about 304 DQDDQ cold rolled stainless steel coil, 304 DQ DDQ CRC
| Thickness | 0.2mm – 8.0mm, etc. Can be customized according to customer requirements. |
|---|---|
| Width | 600mm – 2000mm, Can be customized according to customer requirements. |
| Max coil weight | 25 MT, Can be customized according to customer requirements. |
| Coil ID | 508mm, and 610mm, Can be customized according to customer requirements. |
| Finish | 2B,2D, BA, HL, No. 4, Mirror, etc. |
| Standard | JIS, ASTM, AISI, GB, EN, DIN |
| Mill | TISCO, BaoSteel, Yongjin, Tingshan Brand, etc. |
If you have any needs, please free to contact us for a quotation.
The price of 304 DDQ stainless steel coil is slightly higher than that of regular 304 stainless steel coil, thanks to its higher mechanical properties and deeper annealing process. The price depends on:
- ✔ Thickness and width
- ✔ Surface finish
- ✔ Coil weight and quantity
- ✔ Delivery destination
Please contact Huaxiao Metal for real-time DQ/DDQ stainless steel coil prices.
Why Our 304DDQ Coils Outperform in Manufacturing?
High Elongation & Low Work Hardening: Our DDQ material is specifically annealed to achieve elongation over 52%, allowing for deeper draws without intermediate annealing.
Surface Integrity: Controlled grain structure prevents the common “orange peel” defect after stretching, reducing post-production polishing costs.
Consistent Gauge Control: We use AGC (Automatic Gauge Control) systems to ensure thickness uniformity, which is critical for maintaining consistent die pressure during stamping.
Custom Surface Protection: Available with high-elongation PE film that doesn’t rupture or peel off during the drawing process, protecting the mirror or 2B finish.
Looking for a reliable supplier of deep drawn stainless steel coils? Need a quick quote for 304 DDQ coils?
Huaxiao Metal is your trusted global partner for 304 cold rolled stainless steel coils (DQ, DDQ, etc.).
Application of 304 DQ, DDQ Stainless Steel
304 stainless steel is a common grade of stainless steel known for its excellent corrosion resistance, versatility, and affordability. When it comes to the DQ (Deep Drawing Quality) and DDQ (Extra Deep Drawing Quality) variations of 304 stainless steel, they are specifically suited for applications that involve deep drawing processes.
1. 304 DQ (Deep Drawing Quality):
304 DQ stainless steel possesses high ductility, making it ideal for deep drawing applications where complex shapes need to be formed from flat sheets. Some common applications of 304 DQ stainless steel include:
– Kitchen sinks: The deep bowls and intricate shapes of stainless steel kitchen sinks can be achieved using 304 DQ stainless steel.
– Automotive parts: Various components in the automotive industry, such as exhaust systems, fuel tanks, and body panels, can be manufactured using 304 DQ stainless steel.
– Household appliances: Manufacturers use 304 DQ stainless steel for producing parts of appliances like washing machine drums, refrigerator panels, and dishwasher interiors.
2. 304 DDQ (Extra Deep Drawing Quality):
304 DDQ stainless steel offers even higher formability compared to 304 DQ stainless steel. It is used when extremely complex shapes with tight tolerances are required. Some applications of 304 DDQ stainless steel include:
– Cookware: Pots, pans, and other cookware items often require intricate shapes and precise dimensions, which can be achieved using 304 DDQ stainless steel.
– Metal furniture: 304 DDQ stainless steel is employed in the production of furniture pieces that feature complex designs and shapes, such as chair frames and table bases.
– Decorative items: The high formability of 304 DDQ stainless steel makes it suitable for manufacturing decorative items like sculptures, ornaments, and jewelry.
Both 304 DQ and DDQ stainless steel grades provide excellent corrosion resistance and can be polished to achieve an attractive finish. However, the choice between the two depends on the level of formability required for the specific application. If deep drawing is the primary concern, 304 DQ stainless steel may be sufficient, while for more demanding deep drawing processes, 304 DDQ stainless steel is preferred.
Description of DQ, DDQ, and Normal Material
Stainless steel is a versatile and widely used material known for its excellent corrosion resistance and durability. Within the category of stainless steel, there are different grades and types, each offering specific properties and characteristics for various applications.
DQ, DDQ, and ordinary stainless steel are three commonly used terms to describe different stainless steel materials. Let’s explore what each of these terms means:
DQ Stainless Steel (Deep Drawing Quality):
DQ stainless steel refers to a type of stainless steel that is specifically designed for deep drawing applications. Deep drawing is a metal-forming process used to create complex shapes from flat sheets of metal. DQ stainless steel possesses high ductility, which allows it to undergo significant plastic deformation without fracturing or tearing. It is suitable for manufacturing products such as kitchen sinks, automobile parts, and household appliances.
DDQ Stainless Steel (Extra Deep Drawing Quality):
DDQ stainless steel is an even more formable grade compared to DQ stainless steel. It possesses extremely high ductility, allowing it to undergo severe deformation during the deep drawing process. DDQ stainless steel is commonly used in applications that require complex shapes with tight tolerances, such as cookware, automotive components, and metal furniture.
Ordinary Stainless Steel:
Ordinary stainless steel refers to standard grades of stainless steel that do not have specific designations like DQ or DDQ. These grades still offer good corrosion resistance and mechanical properties but may not possess the same level of formability as DQ or DDQ stainless steel. Ordinary stainless steel is widely used in various industries, including construction, food processing, chemical processing, and marine applications.
It’s important to note that the specific properties and composition of stainless steel can vary depending on the grade and manufacturer. When selecting a stainless steel material for a particular application, it’s crucial to consider factors such as corrosion resistance, mechanical strength, formability, and cost to ensure the chosen grade meets the requirements of the intended use.
What is the Difference Between 304 and 304DDQ Stainless Steel?
Compared with 304, the CR content of 304DQ is increased by half to one, and the polishing is better. Compared with 304, the content of 304DDQ has not changed. The content of NI is increased by half to one, and the deep drawing and deep drawing are better. “Soft material” but poor polishing performance.
304DDQ stainless steel uses a special process to increase the chromium content of 304 stainless steel by 2 points (304 steel plate is 18/8, 304 DDQ is 18/10), which means that the content of nickel (Ni) in 304 stainless steel is 18%, and chromium ( The content of Cr) is 8%; the content of nickel (Ni) in the improved 304DDQ stainless steel is 18%, and the content of chromium (Cr) is 10%; the steel plate has high brightness, no discoloration, and beautiful appearance, but also has the best Good ductility, toughness, and corrosion resistance.
FAQ: Technical Guide for 304DQ/DDQ Sourcing
What makes 304DDQ different from standard 304 stainless steel?
The key difference is the Nickel content and the Copper addition. 304DDQ typically contains more than 9.5% Nickel and a controlled amount of Copper to improve the material’s ductility (elongation) and lower its work-hardening rate, making it suitable for deep-drawing ratios over 2.0.
Can I use 304DQ for a product that requires a 200mm deep draw?
For a 200mm deep draw (like a large kitchen sink), we strongly recommend 304DDQ instead of DQ. The extra elongation in DDQ prevents wall thinning and cracking at the corners of the mold.
Does Huaxiao provide samples for stamping tests?
Yes. We understand the importance of tool compatibility. We can provide sample strips or small coils for your engineering team to perform trial runs and verify the drawing performance before bulk orders.
How do you control the grain size in 304DDQ coils?
We achieve the ideal grain size through precise bright annealing temperatures and cooling rates, ensuring the material stays soft enough for drawing while maintaining structural strength.
Request a 304DQ Cold Rolled Stainless Steel Coil Quote
To receive a tailored quotation, please provide:
- Material grade (304DQ / DDQ)
- Thickness & width
- Surface finish (2B/BA/No.4)
- Quantity
- Destination port
- Required certification
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