HCT980X
(HC660XD, CR650Y980T-DP)
Multi-phase steel for cold forming –
Dual-phase steel
Material no. 1.0944 Chemical composition The samples for the tensile test are taken
according to SZFG Werkstoffblatt 11-980 (melt analysis in percent by weight) at right angles to rolling direction (DIN EN
IMDS: HCT980XD 9621293 min. max. 10346, VDA 239-100). Transverse samples
IMDS: HC660XD 477966559 C 0,115 % are available on request. Because the sta-
IMDS: CR650Y980T-DP 477982330 Si 0,650 % bility of mechanical properties may depend
according to DIN EN 10346 (Okt 15) Mn 2,350 % on time (dual-phase steels tend to natural
according to DIN EN 10143 (Sept 06) P 0,040 % aging), the consumer should process the
according to VDA 239-100 S 0,0050 % products as soon as possible. The mechani-
Al 0,015 % 0,060 % cal values are guaranteed for a maximum of
Dual-phase steel with medium yield strenth Cr+Mo 1,000 % three months after delivery of the material.
Nb+Ti 0,120 %
General Information V 0,060 % Available dimensions
Dual phase steel (DP steel) is a steel with B 0,0030 % Thickness in mm Width in mm
a ferritic and martensitic matrix. With in- Cu 0,150 % 1,003) – 2,00 900 – 1.350
creasing strength it can contain bainite as
The material is described as low-carbon (LCE) with a
3)Thicknesses from 1,00 mm to 1,50 mm on
a second phase. Remnants of austenite request.
max. of 0.115 %. With a carbon equivalent CEV(IIW)
may be present. DP steels combine a ve- of max. 0.65 % it can be described as reduced.
ry low elastic limit with very high tensile Form of delivery
Synonym: LCE = Low Carbon Equivalent
strength and a high degree of cold har- This grade of sheet steel is supplied as
dening. They are characterized by good CEV(IIW): C + Mn/6 + (Cu + Ni)/15 + (Cr + Mo + V)/5) hot galvanized sheet (cold-rolled sheet
cold formability. carrier material) in the surface type MB or
After the oxygen blowing process in U (“unexposed”) with PRETEX® texturing
the converter, the steel is melted and sub- Mechanical properties in accordance with the available material
mitted to an alloying treatment in the se- (as-delivered) sheet 11-980 (based on DIN EN 10346).
condary metallurgy. It is aluminum-killed The delivery is subject to the conditions
and achieves its high tensile strength with Yield strength Rp 0,2 (transverse/longitudinal) of DIN EN 10021 in combination with the
the defined addition of e.g. manganese, 660 – 810 MPa1) / 650 – 800 MPa dimensioning standard DIN EN 10143 or
chromium, molybdenum or silicon as well special conditions if arranged.
as other micro-alloying elements. The me- Tensile strength Rm (transverse/longitudinal) The test unit amounts to 20 t or every
chanical properties are adjusted by con- 980 – 1130 MPa / 980 – 1130 MPa part of 20 t of products of the same grade
trolled raising and lowering of tempera- of steel and nominal thickness. The test unit
ture in the continuous heat treatment unit Total elongation A80 (transverse/longitudinal) for strip stock is the coil.
≥ 9 %2) / ≥ 9 % The strip width as wide strip is 900 mm
to 1,350 mm.
Bake-hardening BH2 (transverse/longitudinal) Slit strip dimensions can be delivered
≥ 30 / ≥ 30 after agreement.
1) A yield strengteh of 980 – 1100 MPa is available
on request.
2) A totoal elongation of ≥ 10 % is available on
request.
Salzgitter Flachstahl GmbH · Eisenhüttenstraße 99 · 38239 Salzgitter
Phone +49 (0) 5341 21-2890 · Telefax +49 (0) 5341 21-8536
E-Mail flachstahl@salzgitter-ag.de · http://www.salzgitter-flachstahl.de
Salzgitter Flachstahl HCT980X (HC660XD, CR650Y980T-DP) Page 1 from 2 Edition: 01/17
Application characteristics
Dual phase steels were developed in (hot) strength after the stove-enamel process. post-treatment depending on the appli-
galvanized form for automotive construc- These properties allow the necessary cation with corrosion protection/forming
tion. Other application areas are being ad- component strength to be achieved wi- aid (Prelube oil, hotmelt), as well as with
ded continuously. What is special about th reduced weight. The potential which forming aids (ATP®). In the processing of
this steel is that, despite the high tensile is possible with regard to weight reduc- dual-phase steel grades, all known tech-
strength, it displays sufficient formability tion by reduction of sheet thickness has nologies of pressing, joining and painting
and is thereby suitable for components been proven in extensive investigations, can continue to be used. The dual-phase
with complex shapes. including FEM (finite element method) si- grades of steel have good cold formabili-
High strength in the component is achie- mulation. The processor of this grade of ty and harden strongly after deformation.
ved by a combination of the work-harde- steel must be sure that their calculation, The dual-phase steels described may be
ning effect and the bake-hardening effect, construction and processing procedures welded by all known welding processes
which represents a special advantage of are suitable for the material. both manual and automated. As filler ma-
dual-phase steels. The shaping technology used must be terial, welding wires or electrodes appro-
suitable for the intended application and ved for this strength group should be
The work-hardening effect refers to the correspond to the state of the art and be used.
increase in strength after the shaping pro- adapted if required.
cedure (strain hardening). The bake-har- The dual-phase grades of steel can receive
dening effect refers to the increase in
You can find all HCT980X/HCT980XG derivatives in this diagram:
Steel grade Classification according to yield strength ranges Yield strength (transverse/longitudinal)
HCT980X
HC600XD low yield strength 600 – 750 MPa / 590 – 740 MPa
CR590Y980T-DP
HC660XD medium yield strength 660 – 810 MPa / 650 – 800 MPa
CR650Y980T-DP
HCT980XG
HC700XD high yield strength 700 – 850 MPa / 700 – 850 MPa
CR700Y980T-DP
All derivatives are available as xpand® version with a guaranteed hole expansion of min. 20 % according to ISO 16630 (vgl.
HHE, High Hole Expansion), as well as a guranteed bending angle of min. 65° according to VDA 238-100 (available on request)
Salzgitter Flachstahl GmbH · Eisenhüttenstraße 99 · 38239 Salzgitter
Phone +49 (0) 5341 21-2890 · Telefax +49 (0) 5341 21-8536
E-Mail flachstahl@salzgitter-ag.de · http://www.salzgitter-flachstahl.de
Salzgitter Flachstahl HCT980X (HC660XD, CR650Y980T-DP) Page 2 from 2 Edition: 01/17
