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HCT780X | 1.0943 Material Datasheet

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Material Description

Material Number	Material Number (single)	Standard	Scope	Standard Status	Country	Predecessor	Successor	VDA 231-106 classification
1.0943 (DIN EN 10346 : 2009-07)	1.0943	DIN EN 10346 : 2009-07	DIN EN 10346 : 2009-07 replaced by DIN EN 10346 : 2015-10	Replaced	Germany	HCT780X	HCT780X	1.1	1)
1) Remark: The cold-rolled dualphase steel HCT780X has a minimum tensile strength of 780 N/mm². It will be delivered as continuously hot-dip coated (+Z, +ZF or +ZA) strip and sheet in thicknesses from 0.35 mm to 3.0 mm. The dual-phase steel has a ferritic base structure with a secondary martensitic phase (possibly bainitic secondary phase). It offers special advantages regarding weight saving production of cold formed and corrosion resistant components in the automotive engineering like wheels, chassis parts, body reinforcements, bumper, profiles etc. because of the good dynamic behaviour the steel is applicated for dynamic loaded parts. The high hardening ability leads to a strong increase of the component yield strength.

Chemical Composition

Al [%]	B [%]	C [%]	Mn [%]	P [%]	S [%]	Si [%]	V [%]	Cr+Mo [%]	Nb+Ti [%]
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Mechanical Properties

Semi-finished Product	Condition	Nominal Size [mm]	Temperature [°C]	Specimen Direction	Tensile Strength [MPa]	Yield Strength (0.2% offset) [MPa]	Elongation A80 [%]	Bake-Hardening-Index [MPa]
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Cross Reference

Material Name	Country	Standard
HCT780X	Europe	EN 10346
CR440Y780T-DP	Germany	VDA 239-100	1)
1) Source: ArcelorMittal, Dualphasenstähle, 2018

Producer/Supplier/Trade names

Tradename	Supplier
Dual Phase 780/Dual Phase 780 LCE	ArcelorMittal Commercial Germany, Cologne
HCT780X	Salzgitter Flachstahl GmbH, Salzgitter
DP-K 45/78	ThyssenKrupp Steel Europe AG, Duisburg
HCT780X	HEINE + BEISSWENGER Stiftung + Co.KG, Fellbach
DOCOL 780DP	SSAB Swedish Steel GmbH, Düsseldorf

Material Compliance

REACh	RoHS
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Linear-elastic

Temperature [°C]	Young's modulus [GPa]	Bulk modulus [GPa]	Shear modulus [GPa]	Poisson's ratio
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Alternating stress

Temperature [°C]	Stress ratio	Mean stress [MPa]	Alternating stress [MPa]	Cycles
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Yield strength

Temperature [°C]	0.1% Proof strength [MPa]	0.2% Proof strength [MPa]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

WIAM Material	Treatment	Semi-finished product	Dimension [mm]	Load type	Failure criteria	Rolling direction	Maximum stress [MPa]	Strain at maximum stress [%]	Source description
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Designation

Designation	Material number	Source
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Yield strength

Temperature [°C]	0.1% Proof strength [MPa]	0.2% Proof strength [MPa]	Yield strength [MPa]
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Tensile strength

Temperature [°C]	Tensile strength [MPa]
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Classification

WIAM Material	Treatment	Semi-finished product	Dimension [mm]	Load type	Failure criteria	Rolling direction	Maximum stress [MPa]	Strain at maximum stress [%]	Source description
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