Docol® 600DH dual phase with high formability

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General Product Description

Docol 600DH trip assisted dual-phase steel provides improved formability and comparable weldability to traditional dual-phase steels. Its suitability for car safety and structural components are supported not only by deep drawability but also by enhanced edge formability.

This steel undergoes a special heat treatment producing mainly two-phase structure. Ferrite that imparts unique forming properties represents one phase and martensite that accounts for the strength represents the other phase. Small amounts of bainite and retained austenite improve formability further.

Dimension Range

Cold rolled / GI: thickness 0.80-2.40 mm, width up to 1400 mm.

Slit strip and cut to length sheets are available upon request.

Grade and coating specific restrictions on available dimensions may occur.

Mechanical Properties

Docol CR​330Y​590T-​DH

Standard
SSAB
Coating
GI
Test direction
L
Yield strength Rp0.2
(MPa)
330 - 430
Tensile strength Rm
(MPa)
590 - 700
Elongation A80
(min %)
26
n4-6
(min)
0.20
n10-20/Ag
(min)
0.16
BH2
(min MPa)
30

Chemical Composition (ladle analysis)

Docol CR​330Y​590T-​DH

Coating
GI
C
(max %)
0.15
Si
(max %)
0.80
Mn
(max %)
2.50
P
(max %)
0.050
S
(max %)
0.010
Al
(%)
0.015 - 1.00
Nb+Ti
(max %)
0.15
Cr+Mo
(max %)
1.40
B
(max %)
0.005
Cu
(max %)
0.20

Tolerances

Hot-dip galvanized (GI): Tolerances in accordance to EN 10143.

Customized dimensional and shape tolerances are available upon request.

Coatings

Coating type
Coating type
GI
Coating class
40/40
Standard
VDA 239-100
Closest in EN 10346, informative
Z100
Coating mass per side, single spot test (g/m2)
40 - 60 1)
Thickness per side informative (µm)
5.6 - 8.5
Density (g/cm3)
7.1
Surface quality (U = unexposed, E = exposed)
U
Coating type
Coating type
GI
Coating class
50/50
Standard
VDA 239-100
Closest in EN 10346, informative
Coating mass per side, single spot test (g/m2)
50 - 70 1)
Thickness per side informative (µm)
7.0 - 9.9
Density (g/cm3)
7.1
Surface quality (U = unexposed, E = exposed)
U
Coating type
Coating type
GI
Coating class
60/60
Standard
VDA 239-100
Closest in EN 10346, informative
Z140
Coating mass per side, single spot test (g/m2)
60 - 90
Thickness per side informative (µm)
8.5 - 12.7
Density (g/cm3)
7.1
Surface quality (U = unexposed, E = exposed)
U
Coating type
Coating type
GI
Coating class
70/70
Standard
VDA 239-100
Closest in EN 10346, informative
Coating mass per side, single spot test (g/m2)
70 - 100
Thickness per side informative (µm)
9.9 - 14.1
Density (g/cm3)
7.1
Surface quality (U = unexposed, E = exposed)
U
Coating type
Coating type
GI
Coating class
85/85
Standard
VDA 239-100
Closest in EN 10346, informative
Coating mass per side, single spot test (g/m2)
85 - 115
Thickness per side informative (µm)
12.0 - 16.2
Density (g/cm3)
7.1
Surface quality (U = unexposed, E = exposed)
U
Coating type
Coating type
GI
Coating class
115/115
Standard
VDA 239-100
Closest in EN 10346, informative
Z275
Coating mass per side, single spot test (g/m2)
115 - 155
Thickness per side informative (µm)
16.2 - 21.8
Density (g/cm3)
7.1
Surface quality (U = unexposed, E = exposed)
U

The metal coating options for Docol products include:

Hot-dip zinc coating (GI) consists almost entirely of zinc (>99%). It is lead free, resulting in a small zinc spangle size. The coating provides good corrosion protection.

Grade specific availability of metal coatings for Docol products is given in the Mechanical properties table (Coating).

In addition to these coating masses, asymmetric coatings and OEM coating specifications are available upon request.

1) For hot-dipped (GI, ZA, GA) hot rolled (HR) grades, the coating mass tolerance is increased to 30 g/m² by increasing the upper limit.

Surface Treatments

Hot-dip galvanized (GI): available as oiled and/or chemically passivated.

All surface treatments are in accordance with RoHS directive (2011/65/EU) and do not contain Chromium VI (Cr6+). Surface treatments provide only temporary surface protection during transportation and storage. In order to avoid corrosion damages, care must be taken to keep the products dry during transportation and storage. If they become wet, they must be separated and situated so that they are dried quickly.

Fabrication and Other Recommendations

For information concerning fabrication, see SSAB´s brochures on www.ssab.com or consult Tech Support.

Appropriate health and safety precautions must be taken when bending, welding, cutting, grinding or otherwise working on the products.

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