Hot-dip ZINC coated flat steel (Galvanised)
Coating identification (+Z) – EN10346
Coating identification (+GI) – VDA239-100

The “+Z” or “GI” coating refers to steel products coated on both sides with pure zinc, applied through continuous hot-dip galvanisation. This is the most widespread form of protection for steel sheets, chosen for its excellent cost-to-performance ratio and versatility of use.

The effectiveness of corrosion protection depends on the coating thickness (e.g., Z100, Z275, Z600…), which can be selected according to the operating environment or the expected service life of the component.

Galvanisation provides dual protection:

a physical barrier that isolates the metal from contact with the environment,
cathodic protection which safeguards even areas that may be damaged or cut, slowing down the corrosion of the substrate.

EN 10346 standard
Galvanised (+Z) Continuosly hot-dip coated steel flat products for cold forming
Steels for profiling and drawing		Structural steels	Micro-alloyed LAD	Micro-alloyed intertitial-free YD	Micro-alloyed bake-hardening BD
DX51D+Z		S220GD+Z	HX260LAD+Z	HX160YD+Z	HX180BD+Z
Dx52D+Z		S250GD+Z	HX300LAD+Z	HX180YD+Z	HX220BD+Z
DX53D+Z		S280GD+Z	HX340LAD+Z	HX220YD+Z	HX300BD+Z
Dx54D+Z		S320GD+Z	HX380LAD+Z	HX260YD+Z	HX340BD+Z
DX56D+Z		S350GD+Z	HX420LAD+Z	HX300YD+Z
Dx57D+Z		S390GD+Z	HX460LAD+Z
		S420GD+Z	HX500LAD+Z
		S450GD+Z
		S550GD+Z
Multiphase dual-fase X		Multiphase trip steels T	Multiphase complex phase C		Multiphase Ferritic-bainitic F
HCT450X+Z	HDT580X	HCT690T+Z	HCT600C+Z	HDT750C+Z	HDT450F+Z
HCT490X+Z		HCT780T+Z	HCT780C+Z	HDT760C+Z	HDT580F+Z
HCT590X+Z			HCT980C+Z	HDT950C+Z
HCT780X-+Z
HCT980X+Z
HCT980XG+Z

Possible surface coatings in +Z
Coating class	Typical coating thickness per side in µm	Typical coating range per side in µm
Z100	7	5 ÷ 12
Z140	10	7 ÷ 15
Z200	14	10 ÷ 20
Z225	16	11 ÷ 22
Z275	20	13 ÷ 27
Z350	25	17 ÷ 33
Z450	32	22 ÷ 42
Z600	42	29 ÷ 55

Surface Quality
A	As coated surface
B	Improved surface
C	Best quality surface

Surface Treatment
C	Chemically passivated
O	Oiled
CO	Passivated and oiled
P	Phosphated
PO	Phosphated and oiled
S	Sealed – antifinger

VDA 239-100 standard
Sheet steel for cold forming for the automotive applications
Mild Steel		High Strength Steel LA or HSLA		High Strength IF Steel IF	Bake Hardenable Steel BH	Dual Phase Steel DP
Cold	Hot	Cold	Hot	Cold	Cold	Cold	Hot
CR0+GI	HR0+GI	CR210LA+GI	HR210LA+GI	CR180IF+GI	CR180BH+GI	CR290Y490T-DP+GI	HR330Y580T-DP+GI
CR1+GI	HR2+GI	CR240LA+GI	HR240LA+GI	CR210IF+GI	CR210BH+GI	CR330Y590T-DP+GI
CR2+GI		CR270LA+GI	HR270LA+GI	CR240IF+GI	CR240BH+GI	CR440Y780T-DP+GI
CR3+GI		CR300LA+GI	HR300LA+GI	CR270IF+GI	CR270BH+GI	CR500Y780T-DP+GI
CR4+GI		CR340LA+GI	HR340LA+GI			CR590Y980T-DP+GI
CR5+GI		CR380LA+GI	HR380LA+GI			CR700Y980T-DP+GI
		CR420LA+GI	HR420LA+GI			CR780Y1180T-DP+GI
		CR460LA+GI	HR460LA+GI
		CR500LA+GI	HR500LA+GI
		CR550LA+GI	HR550LA+GI
			HR600LA+GI
			HR650LA+GI
			HR700LA+GI
Dual Phase Steel with imrpoved formability DH	Multi-Phase Steels with High Global Formability FH	Complex Phase Steel CP		Complex-Phase Steels with Improved Formability CH	Martensitic Steel MS		Ferritic Bainitic Steel FB
Cold	Cold	Cold	Hot	Cold	Cold	Hot	Hot
CR330Y590T-DH+GI	CR600Y980T-FH+GI	CR570Y780T-CP+GI	HR660Y760T-CP+GI	CR780Y980T-CH+GI	CR860Y1100T-MS+GI	HR900Y1180T-MS+GI	HR300Y450T-FB+GI
CR440Y780T-DH+GI	CR850Y1180T-FH+GI	CR780Y980T-CP+GI	HR750Y950T-CP+GI	CR900Y1180T-CH+GI	CR950Y1200T-MS+GI		HR440Y580T-FB+GI
CR700Y980T-DH+GI		CR900Y1180T-CP+GI		CR1000Y1370T-CH+GI	CR1030Y1300T-MS+GI
CR780Y1180T-DH+GI					CR1220Y1500T-MS+GI
					CR1350Y1700T-MS+GI

Possible surface coatings in +GI
Coating class	Coating mass per side in g/m²	Designation according to EN 10346	Thickness per side (information) in µm
40	40 ÷ 60	Z100	5,6 ÷ 8,5
50	50 ÷ 70		7,0 ÷ 9,9
60	60 ÷ 90	Z140	8,5 ÷ 12,7
70	70 ÷ 100		9,9 ÷ 14,1
85	85 ÷ 115		12,0 ÷ 16,2
115	115 ÷ 155	Z275	16,2 ÷ 21,8

Surface Quality
U	Unexposed
E	Exposed

Surface Treatment
P	Prephosphated
O	Oiled

Fill in the form to request information