Docol® 550LA high strength low alloy

General Product Description

The Docol 550LA steels are high-strength low-alloy steels that offer consistent properties for modern, rapid production methods. It offers consistent properties for modern, rapid production methods. Typical applications include bent profiles. Docol HR550LA-UC can after agreement be adapted and delivered as dual certified with S550MC according to EN 10149-2.

Dimension Range

Hot rolled / UC: thickness 2.00-6.00 mm, width up to 1600 mm.

Hot rolled / GI: thickness 2.00-2.50 mm, width up to 1170 mm.

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

Grade and coating specific restrictions on available dimensions may occur.

Mechanical Properties

	Standard	Coating	Test direction	Yield strength R_p0.2 (MPa)	Tensile strength R_m (MPa)	Elongation A₈₀ (min %)	Elongation A₅ (%)	Min. inner bending radius for a 90° bend
Docol HR550LA	VDA239-100:2016	UC, GI*	L	550 - 670	610 - 750	12	16	1.0 x t

Docol HR550LA

Standard

VDA239-100:2016

Coating

UC, GI*

Test direction

L

Yield strength R_p0.2
(MPa)

550 - 670

Tensile strength R_m
(MPa)

610 - 750

Elongation A₈₀
(min %)

12

Elongation A₅
(%)

16

Min. inner bending radius for a 90° bend

1.0 x t

* Available upon request.

¹⁾A₈₀ value applies for thicknesses < 3.00 mm.

²⁾A₅ value applies for thicknesses ≥ 3.00 mm.

³⁾In some cases tight bending radius may cause micro-cracking of the coating in the bend area. Where design permits, users are encouraged to employlarger radius.

⁴⁾For GI coated material the elongation is reduced by 1 units.

Chemical Composition (heat analysis)

	Coating	C (max %)	Si (max %)	Mn (max %)	P (max %)	S (max %)	Al (%)	Ti (max %)	Nb (max %)	V (max %)
Docol HR550LA	UC	0.12	0.60	1.80	0.025	0.025	From 0.015	0.15	0.09	0.20
Docol HR550LA	GI	0.12	0.60	1.80	0.030	0.025	From 0.015	0.15	0.10	0.20

Docol HR550LA

Coating

UC

C
(max %)

0.12

Si
(max %)

0.60

Mn
(max %)

1.80

P
(max %)

0.025

S
(max %)

0.025

Al
(%)

From 0.015

Ti
(max %)

0.15

Nb
(max %)

0.09

V
(max %)

0.20

Tolerances

Hot rolled (UC): Tolerances in accordance to EN10051.

Hot-dip galvanized (GI): Tolerances in accordance to EN10143.

Customized dimensional and shape tolerances are available upon request.

Surface treatments

Uncoated (UC): available as oiled.

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, [email protected].

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

Docol® High Strength Low Alloy steel product offer

Docol® 550LA high strength low alloy

General Product Description

Dimension Range

Mechanical Properties

Chemical Composition (heat analysis)

Tolerances

Surface treatments

Fabrication and Other Recommendations

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