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STEELS FOR AUTOMOTIVE INDUSTRY

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In category Cold Rolled

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CHARACTERISTICS

Steels for the automotive industry are suitable for cold forming. They exhibit high mechanical resistance due to solid solution hardening with phosphorus. Because of their good impact and fatigue resistance they are used for pressing parts of automotive bodies and for automotive structural components.

APPLICATIONS

Because of their good impact and fatigue resistance they are used for pressing parts of automotive bodies and for automotive structural components.

TECHNICAL SPECIFICATION

GENERAL STRUCTURAL GRADES

European standard
EN 10268/06
Germany
SEW 093/87
HC220P ZStE 220 P
HC260P ZStE 260 P
HC300P ZStE 300 P

CHEMICAL COMPOSITION

Grades according to
EN 10268/06
U. S. Steel Košice
Heat analysis in %
CMAX MnMAX SiMAX PMAX SMAX AlMIN
HC220P 0,07 0,70 0,50 0,08 0,025 0,015
ZStE 220 P 0,06 0,70 0,50 0,08 0,030 0,020
HC260P 0,08 0,70 0,50 0,10 0,025 0,015
ZStE 260 P 1) 0,08 0,70 0,50 0,10 0,030 0,020
HC300P 0,10 0,70 0,50 0,12 0,025 0,015
ZStE 300 P 1) 0,10 0,70 0,50 0,12 0,030 0,020

1) C + P <­­ 0,16

MECHANICKÉ VLASTNOSTI

Grades according to
EN 10268/06
U. S. Steel Košice
Rp0,2
[MPa]
Rm MIN
[MPa]
A 80MIN (%)
Lo = 80 mm
r90
min.
n90
min.
Uhol ohybu
180°
HC220P 220 - 270 320 - 400 32 1,3 0,16  
ZStE 220 P 220 - 280 340 - 420 30     0.a
HC260P 260 - 320 360 - 440 29      
ZStE 260 P 1) 260 - 320 380 - 460 28     0.a
HC300P 300 - 360 400 - 480 26      
ZStE 300 P 1) 300 - 360 420 - 500 26     0.a

Samples are taken transversally to the rolling direction
a = sheet thickness in mm

DIMENSIONS OF SHEETS AND COILS [ mm ]

Nominal thickness Width
  750 975 1 100 1 200 1 250 1 300 1 400 1 500
0,40 - 0,79                  
0,80 - 0,89                  
0,90 - 1,49                  
1,50 - 1,79                  
1,80 - 1,89                  
1,90 - 2,00                  

DIMENSIONS OF SHEETS [mm]

Thickness Length
0,56 - 1,00 1 000 - 3 100
1,01 - 2,00 1 000 - 4 000

DIMENSIONS OF COILS AND SLIT COILS [mm]

Thickness Inner diameter Outer diameter Coil Slit coil
Width Weight Width Weight
0,56 - 1,30 approx. 500 or 600 max. 1 800 750 - 1 050 3 - 15 kg.mm-1 of width 21 - 600 max. 15 000 kg
1,31 - 2,00 approx. 600 750 - 1 500 2 - 17 kg.mm-1 of width

NOTE: thickness is graded by 0,01 mm.

THICKNESS TOLERANCES IN ACCORDANCE WITH EN 10131/06 [ 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 ± 0,03 ± 0,04 ± 0,025 ± 0,030
> 0,60 ≤­­ 0,80 ± 0,04 ± 0,05 ± 0,030 ± 0,035
> 0,80 ≤­­ 1,00 ± 0,05 ± 0,06 ± 0,035 ± 0,040
> 1,00 ≤­­ 1,20 ± 0,06 ± 0,07 ± 0,040 ± 0,050
> 1,20 ≤­­ 1,60 ± 0,08 ± 0,09 ± 0,050 ± 0,060
> 1,60 ≤­­ 2,00 ± 0,10 ± 0,11 ± 0,060 ± 0,070

NOTE: reduced tolerances are subject to prior agreement

THICKNESS TOLERANCES IN ACCORDANCE WITH EN 10131/06 [ mm ]

260 <­­ Re < 340 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 ± 0,030 ± 0,035
> 0,60 ≤ 0,80 ± 0,05 ± 0,06 ± 0,035 ± 0,040
> 0,80 ≤ 1,00 ± 0,06 ± 0,07 ± 0,040 ± 0,050
> 1,00 ≤ 1,20 ± 0,07 ± 0,08 ± 0,050 ± 0,060
> 1,20 ≤ 1,60 ± 0,09 ± 0,11 ± 0,060 ± 0,070
> 1,60 ≤ 2,00 ± 0,12 ± 0,13 ± 0,070 ± 0,080

SHEET FLATNESS TOLERANCES1) IN ACCORDANCE WITH EN 10131/06 [ mm ]

Re < 260 MPa

Nominal width Normal tolerances at thickness Reduced tolerances2) at thickness
< 0,70  ≥ 0,70 < 1,20   ≥ 1,20 < 0,70  ≥ 0,70 < 1,20   ≥ 1,20
≥  600 < 1 200 10 8 7 5 4 3
≥ 1 200 < 1 500 12 10 8 6 5 4
≥ 1 500 17 15 13 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 10131/06 [ mm ]

260 <­­ Re < 340 MPa

Nominal width Normal tolerances at thickness Reduced tolerances2) at thickness
< 0,70  ≥ 0,70 < 1,20   ≥ 1,20 < 0,70  ≥ 0,70 < 1,20   ≥ 1,20
≥  600 < 1 200 13 10 8 8 6 5
≥ 1 200 < 1 500 15 13 11 9 8 6
≥ 1 500 20 19 17 12 10 9

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

SURFACE FINISH AND ROUGHNESS VALUES

Surface finish Symbol Roughness
Bright b Ra ≤­­ 0,9 μm
Matt m 0,6 μm < Ra ≤­­ 1,9 μm
Rough r Ra > 1,6 μm

OTHER FEATURES

SURFACE TREATMENT

  • non-oiled - without corrosion guarantee
  • oiled - oil weight 0,5 - 2,5 g.m-2)
    (electrostatically applied oil layer)

WELDABILITY

  • steels are suitable for welding with standard techniques

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