Docol® 900M martensiticMore about martensitic steel
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Docol 900M martensitic steel helps improve crashworthiness and ensure a lightweight design and cost-efficient production methods for the automotive industry. Docol is one of the strongest cold rolled advanced high-strength steels on the market and has become the material of choice for automotive applications such as side impact beams, bumpers and structural components.
Cold rolled / UC, EG: thickness 0.50-2.10 mm, width up to 1527 mm.
Slit strip and cut to length sheets are available upon request.
Grade and coating specific restrictions on available dimensions may occur.
||Yield strength Rp0.2
|Tensile strength Rm
|Min. inner bending radius for a 90° bend|
|Docol CR700Y900T MS||SSAB||UC, EG||L||700 - 1000||900 - 1100||3||3.0 x t|
The testing of mechanical properties of electrogalvanized products is conducted without coating.
|Docol CR700Y900T MS||UC, EG||0.08||0.40||2.40||0.025||0.010||From 0.015||0.10|
Cold rolled (UC, EG): Tolerances in accordance to EN 10131.
Customized dimensional and shape tolerances are available upon request.
The following improved flatness tolerances are available for cold rolled products upon request.
|Max height 1)
|0.80 - 0.990.031 - 0.039||8|
|1.00 - 1.390.0394 - 0.0547||7|
|1.40 - 1.590.0551 - 0.0626||6|
|1.60 - 1.790.0630 - 0.0705||5|
|1.80 - 2.100.0709 - 0.0827||4|
EG coated martensitic grades are supplied with improved flatness tolerances.
1) Distance from the top surface of the strip normal to flat surface. Measured with a ruler on sheets of mother coil width and minimum length 1200 mm. Cross bow and coil set excluded.
The metal coating options for Docol products include:
Electrogalvanized coating (EG) is applied continuously by electro deposition. The coating consists of zinc (>99%). Electrogalvanized steel is characterized by its excellent surface quality and uniform coating thickness.
Grade specific availability of metal coatings for Docol products is given in the Mechanical properties table (Coating).
|Coating type||Coating class||Standard||Closest in EN standard, informative 1)||Coating mass per side, single spot test (g/m2)||Thickness per side informative (µm)|
|EG||12/12||VDA 239-100||ZE25/25||12 - 32||1.7 - 4.5|
|EG||18/18||VDA 239-100||—||18 - 38||2.5 - 5.4|
|EG||29/29||VDA 239-100||ZE50/50||29 - 49||4.1 - 6.9|
|EG||47/47||VDA 239-100||ZE75/75||47 - 61||6.6 - 8.6|
|EG||50/50||VDA 239-100||—||50 - 70||7.0 - 9.9|
|EG||53/53||VDA 239-100||—||53 - 73||7.5 - 10.3|
|EG||60/60||VDA 239-100||—||60 - 80||8.5 - 11.3|
|EG||65/65||VDA 239-100||ZE100/100||65 - 85||9.2 - 12.0|
|EG||70/70||VDA 239-100||—||70 - 90||9.9 - 12.7|
Docol metal coated products are available with surface quality for unexposed applications.
In addition to these coating masses, OEM specific coatings and single sided EG coatings are available upon request.
1) For GI and GA the closest informative value refers to EN 10346. For EG to EN 10152.
Uncoated (UC): available as oiled.
Electrogalvanized (EG): available as oiled and/or chemically passivated or phosphated.
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.
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.