Dual Phase Steels
SUNLAKE Dual Phase (DP) Steels
SUNLAKE is a reliable duplex steel supplier in China. It maintains close contact with Chinese steel mills and helps customers find the most suitable steel resources.
Dual-phase steel (DP steel for short). Steel composed of two-phase structures of martensite, austenite or bainite and ferrite matrix. Generally, steel composed of ferrite and martensite phase structures is called dual-phase steel. Dual-phase steel is obtained by critical zone heat treatment or controlled rolling of low carbon steel or low alloy high strength steel. This type of steel has a good combination of high strength and high ductility, and has become a new type of stamping steel with high strength and good formability, and has been successfully used in the automotive industry.
SUNLAKE Duplex Steel Grades
Available grades and properties of uncoated DP steel
| Grade | Tensile Properties | Dimensions | ||||
| YS RP0.2，MPa |
TS Rm，MPa (≥) |
EL% A80mm，% (≥) |
n90 (≥) |
thickness(mm) | width(mm) | |
| HC250/450DP | 250～320 | 450 | 27 | 0.16 | 0.6～2.3 | 750～1550 |
| HC290/490DP | 290～390 | 490 | 24 | 0.15 | 0.6～2.3 | 750～1550 |
| HC280/590DP | 280～380 | 590 | 22 | 0.14 | 0.6～2.3 | 750～1550 |
| HC340/590DP | 340～440 | 590 | 20 | 0.14 | 0.6～2.3 | 750～1550 |
| HC550/690DP | 550～660 | 690 | 12 | - | 0.7～2.3 | 750～1480 |
| HC420/780DP | 420～550 | 780 | 14 | - | 0.7～2.3 | 750～1480 |
| HC500/780DP | 500～650 | 780 | 10 | - | 0.7～2.3 | 750～1480 |
| HC550/980DP | 550～730 | 980 | 7 | - | 0.8～2.1 | 750～1250 |
| HC700/980DP | ≥700 | 980 | 7 | - | 0.8～2.1 | 750～1250 |
| HC820/1180DP | 820～1130 | 1180 | 3 | - | 0.8～2.1 | 750～1250 |
Please confirm the ordering standards and technical parameters when placing a formal order. Specific data can be negotiated. Can provide products that comply with European standards, American standards, Japanese standards, Australian standards, etc.
Galvanized DP steel available grades and properties
| Grade | Tensile Properties | Dimensions（GI) | Dimensions(ZF) | Dimensions(EG) | ||||||
| YS RP0.2，MPa |
TS Rm，MPa (≥) |
EL% A80mm，% (≥) |
n90 (≥) |
thickness(mm) | width(mm) | thickness(mm) | width(mm) | thickness(mm) | width(mm) | |
| HC250/450DPD+Z | 250～340 | 450 | 27 | 0.16 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 |
| HC250/450DPD+ZF | 25 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 | |||
| HC300/500DPD+Z | 290～370 | 500 | 24 | 0.15 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 |
| HC300/500DPD+ZF | 22 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 | |||
| HC280/590DPD+Z | 280～450 | 590 | 19 | 0.14 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 |
| HC280/590DPD+ZF | 17 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 | |||
| HC340/590DPD+Z | 340～500 | 590 | 17 | 0.14 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 |
| HC340/590DPD+ZF | 15 | 0.14 | 0.6～2.3 | 800～1600 | 0.6～2.0 | 800～1500 | 0.6～2.0 | 800～1550 | ||
| HC420/780DPD+Z | 420～550 | 780 | 14 | - | 0.7～2.3 | 800～1400 | 0.65～2.0 | 900～1330 | 0.7～2.0 | 800～1480 |
| HC420/780DPD+ZF | 12 | - | 0.7～2.3 | 800～1400 | 0.65～2.0 | 900～1330 | 0.7～2.0 | 800～1480 | ||
| HC500/780DPD+Z | 500～650 | 780 | 10 | - | 0.7～2.3 | 800～1400 | 0.65～2.0 | 900～1330 | 0.7～2.0 | 800～1480 |
| HC500/780DPD+ZF | 8 | - | 0.7～2.3 | 800～1400 | 0.65～2.0 | 900～1330 | 0.7～2.0 | 800～1480 | ||
| HC550/980DPD+Z | 550～730 | 980 | 7 | - | 0.8～2.1 | 800～1250 | 0.8～2.0 | 750～1250 | ||
| HC650/980DPD+Z | 650～850 | 980 | 7 | - | 0.8～2.1 | 800～1250 | 0.8～2.0 | 750～1250 | ||
| HC820/1180DPD+Z | 820～1130 | 1180 | 3 | - | 0.8～2.1 | 800～1250 | ||||
Please confirm the ordering standards and technical parameters when placing a formal order. Specific data can be negotiated. Can provide products that comply with European standards, American standards, Japanese standards, Australian standards, etc.
OEM special duplex steel
Different types of DP steel can be customized to original equipment manufacturer (OEM) specifications, or manufactured to internationally recognized standards such as VDA 239-100:2016, EN 10338:2015, EN 10346:2015, or to SSAB’s own high standards. Standard specifications. We encourage you to contact us early in the design process to ensure your crash or structural component will meet your specific dual phase steel performance requirements.
SUNLAKE Dual Phase Steels Excellent Properties
Superior Strength
Duplex steel offers exceptional strength, combining the benefits of both ferritic and austenitic stainless steels. It provides higher yield strength compared to conventional stainless steels, making it suitable for structural applications that require robustness and load-bearing capacity.
Excellent Corrosion Resistance
Duplex steel exhibits excellent resistance to corrosion, particularly in aggressive environments such as marine and chemical applications. Its balanced composition of chromium, molybdenum, and nitrogen enhances its resistance to pitting, crevice corrosion, and stress corrosion cracking.
Increased Toughness
The microstructure of duplex steel imparts enhanced toughness, enabling it to withstand heavy impacts and vibrations. This makes it a preferred choice for applications that require resistance to dynamic loading, such as offshore structures, pressure vessels, and automotive components.
Good Weldability
Duplex steel offers good weldability, allowing for ease of fabrication and joining. It can be welded using various techniques, including gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), and shielded metal arc welding (SMAW). This facilitates efficient manufacturing processes and reduces production costs.
High Temperature Resistance
Duplex steel maintains its mechanical properties and corrosion resistance at elevated temperatures, making it suitable for applications that involve exposure to high heat. It exhibits excellent thermal stability and oxidation resistance, ensuring long-term performance in challenging operating conditions.
Cost-Effective Solution
Despite its outstanding properties, duplex steel provides a cost-effective solution compared to other high-performance alloys. Its favorable price-to-performance ratio makes it an attractive choice for industries seeking durable and reliable materials without compromising on quality.
SUNLAKE Automotive applications for dual phase steels
DP series high-strength steel has a lower yield-to-strength ratio and better formability, making it one of the first choices for automotive structural parts. Applications include:
Bumpers
Pillars and pillar reinforcements
Cross members
Rails: front, rear and roof
Engine cradles
Rear shock reinforcements
Floor panels
Side members
Front sub-frame package trays
Sill (rocker) reinforcements
Longitudinal beams
Tunnels and reinforcements
Contact us now to harness the power of Duplex Stainless Steel and elevate your projects to unprecedented levels of success. Let us be your partner in innovation and reliability.
We're well-known as one of the leading dual phase steels manufacturers and suppliers in China. Welcome to buy high quality dual phase steels at competitive price from our factory. Contact us for more details.