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BAKE-HARDENING STEELS

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In category Hot Dip Galvanized

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CHARACTERISTICS

These steels have a good suitability for cold forming and present a high resistance to plastic straining (which is increased on finished parts during heat treatment) and a good dent resistance.

U. S. Steel Košice has implemented and maintains a quality control system in accordance with the standard EN ISO 9001 and IATF 16949 for automotive industry, issued by TÜV SÜD.

TECHNICAL SPECIFICATION

CHEMICAL COMPOSITION

Grades according to
EN 10346/09
Heat analysis in %
CMAX MnMAX PMAX SMAX SiMAX AlMAX TiMAX NbMAX
HX180BD + Z, + ZF 0,10 0,70 0,06 0,025 0,50 0,1 0,12  0,09
HX220BD + Z, + ZF 0,10 0,70 0,08 0,025 0,50 0,1 0,12  0,09
HX260BD + Z,+ ZF 0,10 0,80 0,10 0,025 0,50 0,1 0,12 0,09
HX300BD + Z, + ZF 0,11 0,80 0,12 0,025 0,50 0,1 0,12  0,09

MECHANICAL PROPERTIES

Grades according to
EN 10346/09
Rp0,2
[MPa]
Rm
[MPa]
A MIN (%)
Lo = 80 mm
Index BH efektu BH2 [MPa] r90
min.
n90
min.
HX180BD + Z, + ZF 180 - 240 290 - 360 34 min. 35 1,5 0,16
HX220BD + Z, + ZF 220 - 280 320 - 400 32 min. 35 1,2 0,15
HX260BD + Z,+ ZF 260 - 320 360 - 440 28 min. 35 - -
HX300BD + Z, + ZF 300 - 360 400 - 480 26 min. 35 - -

DIMENSIONS OF SHEETS AND COILS [ MM ]

HX180BD

Nominal thickness   800 1000 1100 1240 1300 1380 1500
0,42 - 0,44                
0,45 - 0,49              
0,50 - 0,59            
0,60 - 0,69          
0,70 - 0,79        
1,00 - 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 cca 500 max. 1 400 40 - 600
(depending on sheet thickness)
3 - 9,9
cca 600
2 - 9,4

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

DIMENSIONS OF SHEETS AND COILS [ MM ]

HX220BD

Nominal thickness   800 1120 1300 1400 1500
0,40 - 0,55            
0,56 - 0,85          
1,06 - 1,25        
1,26 - 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 cca 500 max. 1 400 40 - 600
(depending on sheet thickness)
3 - 9,9
cca 600
2 - 9,4

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

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 ± 0,04 ± 0,05 ± 0,030 ± 0,035
> 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

SHEET FLATNESS TOLERANCES 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

NOTE: flatness tolerances valid only for plates

DIMENSIONS OF SHEETS AND COILS [ MM ] 

HX300BD

Nominal thickness   800 1240 1260 1300 1400 1500
0,50 - 0,69              
0,70 - 0,79            
0,80 - 0,89          
0,90 - 1,19        
1,20 - 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 cca 500 max. 1 400 40 - 600
(depending on sheet thickness)
3 - 9,9
cca 600
2 - 9,4

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

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 TOLERANCES IN ACCORDANCE WITH EN 10143/06 [ MM ]

260 ≤­­­­ RE < 360 MPA

Nominal width Normal tolerances at thickness Reduced tolerances 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

NOTE: flatness tolerances valid only for plates

PARAMETERS OF COATING

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

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)

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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