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Microalloyed cold-rolled steels (HSLA) are characterized by a low Carbon content and obtained through a special cooling process during hot rolling, which results in high ductility and mechanical strength.
Their fine-grain microstructure and high chemical purity make this type of steel suitable for complex geometries in molding and bending, while maintaining high strength characteristics.
Among the most important final applications we can list seat structures, their adjustments, car doors and locking elements, furniture hinges, etc.
| A | Defects such as pores, slight scratches, small marks, slight scoring, or slight staining that do not adversely affect formability or the application of surface coatings are allowed | ||||||||||
| B | Not applicable to microalloyed high-strength steels | ||||||||||
| SURFACE FINISH | SYMBOL | SURFACE ROUGHNESS Ra | |
| µ meters | µ inches | ||
| Shiny | b | Ra≤ 0.4 µm | Ra≤ 15.75 µ” |
| Semi-shiny | g | Ra≤ 0.9 µm | Ra≤ 35.43 µ” |
| Normal | m | 0.6 µm < Ra ≤ 1.9µm | 26.32 µ” < Ra ≤ 74.80 µ” |
| Rough | r | Ra > 1.6 µm | Ra > 63.00 µ” |
| Quality | Re(Mpa) | Rm(Mpa) | A80 (%) | A80 (%) |
| min-max | min-max | min | min | |
| EN10268 | 0,5 < t ≤ 0,7 | t > 0,7 | ||
| HC260LA | 260-330 | 350-430 | 24 | 26 |
| HC300LA | 300-380 | 380-480 | 21 | 23 |
| HC340LA | 340-420 | 410-510 | 19 | 21 |
| HC380LA | 380-480 | 440-560 | 17 | 19 |
| HC420LA | 420-520 | 470-590 | 15 | 17 |
| Tensile tests performed on transverse specimens | ||||
| t=laminate thickness in mm | ||||
| Quality | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Al (%) | Ti (%) | Nb (%) |
| EN10268 | max | max | max | max | max | min | max(1) | max(1) |
| HC260LA | 0.10 | 0.50 | 0.60 | 0.25 | 0.25 | 0.15 | 0.15 | 0.09 |
| HC300LA | 0.10 | 0.50 | 1.00 | 0.25 | 0.25 | 0.15 | 0.15 | 0.09 |
| HC340LA | 0.10 | 0.50 | 1.10 | 0.25 | 0.25 | 0.15 | 0.15 | 0.09 |
| HC380LA | 0.10 | 0.50 | 1.60 | 0.25 | 0.25 | 0.15 | 0.15 | 0.09 |
| HC420LA | 0.10 | 0.50 | 1.60 | 0.25 | 0.25 | 0.15 | 0.15 | 0.09 |
| 1) These elements can be present alone or combined; vanadium can be used; in any case, the sum of the 3 elements must not exceed 0.22% | ||||||||
| Europe | Mat | Europe | D | E | F | USA |
| EN10268 (ref. Transverse) | N° | EN 10268 (ref. Longitudinal) | SEW 093:1987 | UNE 36122 | NF A36-232:1992 | SAE J1392 |
| HC260LA | 1.0480 | H 240 LA | ZStE 260 | – | E 260 C | 035 XLF |
| HC300LA | 1.0489 | H 280 LA | ZStE 300 | – | E 280 C | 040 XLF |
| HC340LA | 1.0548 | H 320 LA | ZStE 340 | AE 335 HF | E 315 C | 045 XLF |
| HC380LA | 1.0550 | H 360 LA | ZStE 380 | AE 390 HF | E 355 C | 050 XLF |
Commit Siderurgica SPA
Via dell’industria, 23
35030 Veggiano (PD)
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35030 Veggiano (PD)
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