Docol® 550HE

General Product Description

The Docol HR550Y600T HE steel is the next generation of hot-rolled high-strength low-alloy steels with improved local formability for higher edge ductility and cut-edge quality which leads to greatly improved hole expansion.

Docol HR550Y600T HE are especially suitable for operations where high strength in combination with demanding forming is needed where cut edges may limit the forming operation.

These next generation steels have a new and closely controlled production method resulting in a fine microstructure and steel and with excellent formability and cut-edge quality. The Docol HR550Y600T HE is less sensitive to tool-settings and -wear, and will deliver an improved cut-edge compared to conventional HSLA grades.

This grades is also well suited for forming and bending operations with a bend radius of 0xt and compared to a conventional HSLA grade, the typical hole expansion result is improved with approx. 30 percentage points.

Docol HR550Y600T HE will excel when optimizing any fine blanking, stamping or forming operation and will push the limit on how to utilize the benefits of steel.

Docol HR550Y600T HE can after agreement be adapted and delivered as dual certified with S550MC according to EN 10149-2.

Dimension Range

Docol HR550Y600T HE is available as Hot-rolled pickled and oiled coil, slit coils and cut to length sheets in thickness of 2.00^*) - 7.00 mm and widths up to 1600 mm. Length up to 16 meters.

^*)Some restrictions may occur, and will be handled on request.

Mechanical Properties

	Coating	Yield strength R_p0.2 (min MPa)	Tensile strength R_m (MPa)	Elongation A₈₀¹⁾ (min %)	Elongation A₅²⁾ (min %)	Hole expansion ratio ³⁾ (% typical)	Min. inner bending radius for a 90° bend
Docol HR550Y600T HE	UC	550	610 - 750	12	16	65	0.0 x t

Docol HR550Y600T HE

Coating

UC

Yield strength R_p0.2
(min MPa)

550

Tensile strength R_m
(MPa)

610 - 750

Elongation A₈₀¹⁾
(min %)

12

Elongation A₅²⁾
(min %)

16

Hole expansion ratio ³⁾
(% typical)

65

Min. inner bending radius for a 90° bend

0.0 x t

The mechanical properties are valid in the longitudinal direction.

Bending properties for both longitudinal and transversal direction.

¹⁾ A₈₀ value applies for thicknesses < 3.00 mm.

²⁾ A₅ value applies for thicknesses ≥ 3.00 mm.

³⁾ HER –ratio is average of three test results out of five tested samples by excluding minimum and maximum results.

Chemical Composition (ladle analysis)

	C (max %)	Si (max %)	Mn (max %)	P (max %)	S (max %)	Al_tot (min %)	Nb (max %)	V (max %)	Ti (max %)
Docol HR550Y600T HE	0.12	0.03 ¹⁾	1.80	0.025	0.010	0.015	0.09 ²⁾	0.20 ²⁾	0.15 ²⁾

Docol HR550Y600T HE

C
(max %)

0.12

Si
(max %)

0.03 ¹⁾

Mn
(max %)

1.80

P
(max %)

0.025

S
(max %)

0.010

Al_tot
(min %)

0.015

Nb
(max %)

0.09 ²⁾

V
(max %)

0.20 ²⁾

Ti
(max %)

0.15 ²⁾

The steel is grain refined.

¹⁾ If the material is to be hot-dip galvanized, this must be specified in the order.

²⁾ The sum of Nb, V and Ti is max 0.22%.

Tolerances

Hot-rolled (UC): Tolerances in accordance to EN 10051.

Customized dimensional and shape tolerances are available on request.

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.

Docol® High Edge Ductility steel product offer

Docol® 550HE high edge ductility

General Product Description

Dimension Range

Mechanical Properties

Chemical Composition (ladle analysis)

Tolerances

Fabrication and Other Recommendations

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