HISTAR
Arcelor's HISTAR range combines high yield strength with excellent toughness
at low temperatures and outstanding weldability. HISTAR H-rolled beams undergo
a unique quenching and self-tempering procedure and pre-heating is not required
for welding.
The hot-rolled beams and columns, up to 1118mm deep and
1086 kg/m heavy are suitable for heavy load/long span situations, including
high rise buildings, bridges, stadia, mining and off-shore applications.
HISTAR beams have been used in a
wide range of projects world wide, including:
- Southern Cross Building, Melbourne
- Shanghai World Financial Centre - Mori Building, Shanghai
- Marine Stadium, Seattle
When compared to standard structural steels, HISTAR grades feature improved
guaranteed mechanical characteristics over the whole range of product thicknesses.
HISTAR grades are
available with minimum yield strengths of 355 or 460 MPa. To best suit the
different applications, HISTAR grades are available with guaranteed toughness
to -20 and -50 degrees celsius. Furthermore, the new steels are recommended in
case of stress governed as well as seismic design.
The HISTAR grades for
offshore applications offer the following additional features:
- Improved deformation properties in through thickness direction with respect to the resistance to lamellar tearing (Z qualities).
- Notch impact properties in tranverse direction.
- Maximum ratio between yield strength and tensile strength.
Table 1 shows a comparison, on a yield strength basis, between HISTAR and other standard structural steel grades
| HISTAR YIELD STRENGTH (MPa) |
STANDARDS |
|
|
European and National Standards |
|
EN10113-3:1993 |
EN10025:1993 |
EN10225:2001 |
ASTMA913-02 |
JIS G3106:1995 |
| 355 |
S355 |
S355 |
S355 |
Gr 50 |
SM 490 B/C/YB |
| 460 |
S460 |
|
S460 |
Gr 65 |
SM570 |
TABLE 1
|
