Zinc-magnesium

Steel strips coated with high-strength zinc-magnesium.

Zinc-magnesium coated steel strips are distinguished by high corrosion resistance and excellent processing characteristics.

Application of a zinc-magnesium coating is achieved by dipping the prepared tape into a molten bath of zinc-aluminum-magnesium.

The bath composition contains 1.5 to 8 percent aluminum and magnesium and at least 0.2 percent magnesium and zinc for the remainder. Information on chemical composition and density can be obtained from the manufacturer.

These products are used in light, deep and very deep profiling and molding.

Mechanical characteristics

Coverage of the zinc-magnesium (ZM) coating

Surface appearance

Surface protection

Comparison chart of materials in salt spray (CNS)

Mechanical characteristics

Coverage of the zinc-magnesium (ZM) coating

Surface appearance

Surface protection

Comparison chart of materials in salt spray (CNS)

Areas of use:

• Heating
• Radiation
• Household appliances
• Agriculture
• Road applications
• Construction industry

Technical supply conditions:

They can be supplied with special requirements for coating finish, surface appearance and surface protection..

Surface protection can be of different types and must be appropriately indicated when placing the order.

Surface appearance can be type A, B or C.

Data sheet

Data sheet with current European standards and technical characteristics of the product.

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Name	Type of coating	Yield strength	Rupture	Elongation	Plastic deformation ratio	Cracking
Name	Type of coating	Yield strength	Rupture	Elongation	Plastic deformation ratio	Cracking
Quality	Type of coating	Re MPag	Rm MPag	A80 % min	r90 min	n90 min
DX51D	+Z, +ZF, +ZA, +ZM, +AZ, +AS	–	270 to 500	22	–	–
DX52D	+Z, +ZF, +ZA, +ZM, +AZ, +AS	140 to 300	270 to 420	26	–	–
DX53D	+Z, +ZF, +ZA, +ZM, +AZ, +AS	140 to 260	270 to 380	30	–	–
DX54D	+Z, +ZA	120 to 220	260 to 350	36	1,6	0,18
DX54D	+ZF, +ZM	120 to 220	260 to 350	34	1,4	0,18
DX54D	+AZ	120 to 220	260 to 350	36	–	–
DX54D	+AS	120 to 220	260 to 350	34	1,4	0,18
DX55D	+AS	140 to 240	270 to 370	30	–	–
DX56D	+Z, +ZA	120 to 180	260 to 350	39	1,9	0,21
DX56D	+ZF, +ZM	120 to 180	260 to 350	37	1,7	0,2
DX56D	+AZ, +AS	120 to 180	260 to 350	39	1,7	0,2
DX57D	+Z, +ZA	120 to 170	260 to 350	41	2,1	0,22
DX57D	+ZF, +ZM	120 to 170	260 to 350	39	1,9	0,21
DX57D	+AS	120 to 170	260 to 350	41	1,9	0,21
g 1MPa = 1N/mm2

Coating name	Minimum weight1)		Typical values of coating thickness per side in the single spot test		Density
	g/m2		μm
	Triple spot test	Single spot test	Typical value	Range
Zinc-magnesium (ZM) coating weight
ZM060	60	50	4,5	4-8	6,2-6,6
ZM070	70	60	5,5	4-8
ZM080	80	70	6	4-10
ZM090	90	75	7	5-10
ZM100	100	85	8	5-11
ZM120	120	100	9	6-14
ZM130	130	110	10	7-15
ZM140	140	120	11	8-16
ZM150	150	130	11,5	8-17
ZM160	160	130	12	8-17
ZM175	175	145	13	9-18
ZM190	190	160	15	10-20
ZM200	200	170	15	10-20
ZM250	250	215	19	13-25
ZM300	300	255	23	17-30
ZM310	310	265	24	18-31
ZM350	350	300	27	19-33
ZM430	430	365	35	26-46
1) The g/m2 include both surfaces

C	Chemical passivation
O	Oiling using oils that can be removed during greasing without compromising the coating
CO	Combination of oiling and chemical passivation to enhance the protective effect against corrosion
S	Organic passivation, commercially referred to as AFP (Anti Finger Print) or SPT (Resin Coating), consisting of a polymer film containing corrosion inhibitors; available free of hexavalent chromium; improves corrosion protection, prevents fingerprinting, facilitates sliding during processing, and acts as a primer during painting
P	Phosphating, particularly suitable for the application of a subsequent layer of paint
PO	Combination of phosphating and oiling to improve formability

A	Minor imperfections - such as small honeycombs, variations in grain size, dark spots, light scratches, and passivation spots - are possible
B	It is obtained through skinpass. Small imperfections - such as scratches due to skinpass, streaks, irregularities (not cavities) - are possible with this kind of surface
C	It is obtained through skinpass. The best surface does not harm the apparent uniformity of a high color finish class; the other surface must be at least type B