STEELS FOR AUTOMOTIVE INDUSTRY
Applications
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.
Grades
Cold rolled products are classified into quality grades according to
their chemical composition and mechanic properties.
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
MECHANICAL PROPERTIES
| 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. |
Angle of bend 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 |
NOTE: reduced tolerances are subject to prior agreement
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 surfaces are subject to prior agreement
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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