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STRUCTURAL STEELS

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In category Hot Dip Galvanized

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CHARACTERISTICS

Structural grade sheets are used wherever strength parameters are prescribed, for supporting parts of building elements, bend profiles, etc.
U. S. Steel Košice has implemented and maintains a quality control system in accordance with the standard EN ISO 9001 and IATF 16949 for the automotive industry, issued by TÜV SÜD.

Grades

Galvanized products are classified into quality grades according to their chemical composition and mechanical properties.

TECHNICAL SPECIFICATION

STRUCTURAL GRADES

European standard
EN 10346/09
Japan
JIS 3302
USA, ASTM U. S. Steel Košice, s.r.o.
TN USSK 10143-4/13
ZINKOMAGTM
A 446 A 653
S220GD + Z + ZF   Gr. A SS Gr. 33 S220GD+ZM
S250GD + Z + ZF SGC 340 Gr. B SS Gr. 37 S250GD+ZM
S280GD + Z + ZF SGC 400 Gr. C SS Gr. 40 S280GD+ZM
S320GD + Z + ZF SGC 440 - SS Gr. 50 class 1, 2 S320GD+ZM
S350GD + Z + ZF SGC 440 Gr. D class 1 SS Gr. 53 class 3 S350GD+ZM

CHEMICAL COMPOSITION

Grades according to
EN 10346/09
U. S. Steel Košice
Heat analysis in %
CMAX MnMAX PMAX SMAX SiMAX
S220GD + Z + ZF 0,20 1,70 0,100 0,045 0,60
S250GD + Z + ZF 0,20 1,70 0,100 0,045 0,60
S280GD + Z + ZF 0,20 1,70 0,100 0,045 0,60
S320GD + Z + ZF 0,20 1,70 0,100 0,040 0,60
S350GD + Z + ZF 0,20 1,70 0,100 0,045 0,60
S220GD+ZM 0,20 1,70 0,100 0,045 0,60
S250GD+ZM 0,20 1,70 0,100 0,045 0,60
S280GD+ZM 0,20 1,70 0,100 0,045 0,60
S320GD+ZM 0,20 1,70 0,100 0,045 0,60
S350GD+ZM 0,20 1,70 0,100 0,045 0,60

MECHANICAL PROPERTIES

Grades according to
EN 10346/09
U. S. Steel Košice
ReH MIN
[MPa]
Rm MIN
[MPa]
A MIN (%)
Lo = 80 mm
S220GD + Z + ZF 220 300 20
S250GD + Z + ZF 250 330 19
S280GD + Z + ZF 280 360 18
S320GD + Z + ZF 320 390 17
S350GD + Z + ZF 350 420 16
S220GD+ZM 220 300 20
S250GD+ZM 250 330 19
S280GD+ZM 280 360 18
S320GD+ZM 320 390 17
S350GD+ZM 350 420 16

 

DIMENSIONS OF SHEETS AND COILS [ MM ]

grades S220GD, S250GD, S280GD

Nominal thickness   800 1250 1300 1400 1500
0,50 - 0,59            
0,60 - 0,79          
0,80 - 0,99        
1,00- 2,00      

DIMENSIONS OF SHEETS AND COILS [ MM ]

grades S320GD, S350GD

Nominal thickness   800 1000 1100 1250 1300 1380 1500
0,50 - 0,59                
0,60 - 0,99              
1,00 -1,69            
1,70- 1,79          
1,80 - 1,89        
1,90 - 2,00      
Nominal thickness Sheet length Coil diameter Slit coil width Nominal coil weight
[kg.mm -1 of width]
inner outer
0,50 - 2,00 1 000 - 3 100 approx. 500 max. 1 400 40 - 600
(depending on sheet thickness)
3 - 9,9
approx. 600 2 - 9,4

NOTE: - thickness is graded by 0,01 mm, width is graded by 5,0 mm, length is graded by 5 mm
- nominal thickness includes zinc coat
- ZINKOMAGTM - thickness: 0,40 - 1,70 mm
- width: 900 - 1300 mm

THICKNESS TOLERANCES- EN 10143/06 [ MM ]

RE < 260 MPA

Nominal thickness Normal tolerances at width Reduced tolerances at width
≤ 1 200 >1 200 ≤ 1 500 ≤ 1 200 >1 200 ≤ 1 500
> 0,40 ≤ 0,60 ± 0,04 ± 0,05 ± 0,035 ± 0,040
> 0,60 ≤ 0,80 ± 0,05 ± 0,06 ± 0,040 ± 0,045
> 0,80 ≤ 1,00 ± 0,06 ± 0,07 ± 0,045 ± 0,050
> 1,00 ≤ 1,20 ± 0,07 ± 0,08 ± 0,050 ± 0,060
> 1,20 ≤ 1,60 ± 0,10 ± 0,11 ± 0,060 ± 0,070
> 1,60 ≤ 2,00 ± 0,12 ± 0,13 ± 0,070 ± 0,080

NOTE: reduced tolerances are the subject to prior agreement

THICKNESS TOLERANCES - EN 10143/06 [ MM ]

260 ≤ RE < 360 MPA

Nominal thickness Normal tolerances at width Reduced tolerances at width
≤ 1 200 >1 200 ≤ 1 500 ≤ 1 200 >1 200 ≤ 1 500
> 0,40 ≤ 0,60 ± 0,05 ± 0,06 ± 0,040 ± 0,045
> 0,60 ≤ 0,80 ± 0,06 ± 0,07 ± 0,045 ± 0,050
> 0,80 ≤ 1,00 ± 0,07 ± 0,08 ± 0,050 ± 0,060
> 1,00 ≤ 1,20 ± 0,08 ± 0,09 ± 0,060 ± 0,070
> 1,20 ≤ 1,60 ± 0,11 ± 0,13 ± 0,070 ± 0,080
> 1,60 ≤ 2,00 ± 0,14 ± 0,15 ± 0,080 ± 0,090

NOTE: reduced tolerances are the subject to prior agreement

SHEET FLATNESS TOLERANCES1) IN ACCORDANCE WITH EN 10143/06 [ MM ]

RE < 260 MPA

Nominal width Normal tolerances at thickness Reduced tolerances2) at thickness
< 0,70  ≥ 0,70 < 2,00 < 0,70  ≥ 0,70 < 1,60  ≥ 1,60 < 2,00
 ≥ 600 < 1 200 10 8 5 4 3
 ≥ 1 200 < 1 500 12 10 6 5 4
 ≥ 1 500 17 15 8 7 6

1) coil flatness tolerances are subject to prior agreement
2) reduced tolerances are subject to prior agreement

SHEET FLATNESS TOLERANCES1) IN ACCORDANCE WITH EN 10143/06 [ MM ]

260 ≤ RE < 360 MPA

Nominal width Normal tolerances at thickness Reduced tolerances2) at thickness
< 0,70  ≥ 0,70 < 2,00 < 0,70  ≥ 0,70 < 1,60  ≥ 1,60 < 2,00
 ≥ 600 < 1 200 13 10 8 6 5
 ≥ 1 200 < 1 500 15 13 9 8 6
 ≥ 1 500 20 19 12 10 9

1) coil flatness tolerances are subject to prior agreement
2) reduced tolerances are subject to prior agreement

PARAMETERS OF COATING

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Zinc coating
(Z)
Min. weight of surface coating from
both sides [g.m-2]
same 100; 140; 150; 180; 200; 225; 275;(350)
differential 140/100; 150/85;
Zinc-iron coating
(ZF)
Min. weight of surface coating from
both sides [g.m-2]
same 90; 100; 110; 120
Zn-Al-Mg coating
(ZM)
Min. weight of surface coating from
both sides [g.m-2]
same 100 - 150

Other dimensions are subject to prior agreement
Informative thickness of zinc layer: 7g.m-2 ≈ 1μm

OTHER FEATURES

COATING PROPERTIES

Zinc coated products (Z)

  • normal zinc spangle (N)
  • minimized spangle (M)

Zinc-iron alloy coated products (ZF)
Zinc-aluminum-magnesium coating (ZM)

SURFACE QUALITY

  • coated surface A according to EN 10 346/09
  • improved surface B according to EN 10 346/09

SURFACE TREATMENT

  • chemically passivated C (Cr 6+ free; f- - free, RoHS compliant
  • oiled O (0,6-2,5 g.m-2 )
  • chemically passivated and oiled CO (only coils)
  • TOC (Thin Organic Coating) S
  • without surface treatment

If you need specific parameters that are not listed here, please contact us

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