Fem divisioner
SSAB Special Steels
SSAB Europe
Global steel and service partner in
value added Advanced High Strength
Steels (AHSS) and Quenched &
Tempered steels (Q&T)
Nordic-based steel producer of
high-quality strip, heavy plate and
tubes
Tibnor
Nordic full-service steel
distribution partner
2
SSAB Americas
North America-based steel
producer of high-quality heavy
plate
Ruukki
Construction
European provider of
energy efficient building
and construction
solutions
Fem produktionslinjer
1
2
1
1
2
2
3
Luleå
Steel-making
Borlänge
Strip products
Oxelösund
Steel-making, heavy plates
3
1
2
3
Raahe
Steel-making, heavy plates
and strip products
Hämeenlinna
Strip products and tubes
Låglegerade form- och svetsbara stål
4
Låglegerade form- och svetsbara stål
fy (MPa)
1600
1400
1200
Eurokod 3
EN 1993-1-1: < S460
EN 1993-1-12: < S700
1000
800
600
400
200
0
Konstruktionsstål
Låglegerade form- och svetsbara stål
stress s
High strength steel
ReHS
Mild steel
ReMS
strain e
6
Att tänka på i tillverkningsprocessen
Forming
►
►
►
►
►
►
Återfjädring
Bockningsradie
Dynvidd
Stämpelradie
Klippspalt
Högre krav på verktygsstålet
Svetsning
► Svetsparametrar
► Tillsatsmaterial
► Fogtyp
7
Wednesday, October 1, 2014
First Last name
High strength steels
in construction
Ilkka Sorsa, Ruukki Construction Oy
8
www.ruukki.com | Ilkka Sorsa
11/02/2015
Benefits of HSS in steel construction are based
on savings in value chain
• Steel price and processing costs will guide the selection of steels
• Weight savings in order of 20-40 % can be reached
• Costs savings in order of 10-20 %
Raw- material
Processing
Painting
Logistic
Erection
11/02/2015
www.ruukki.com | Ilkka Sorsa
Relative cost of 30m tubular truss compared
to 355- solution
Material, processing and painting costs included
1,02
1
0,98
Ca 5 %
0,96
0,94
0,92
0,9
0,88
355
10
date/month/year
355/420
355/550
www.ruukki.com | Firstname Lastname |
INTERNAL
550
355/700
700
Relative cost of 50m tubular truss compared
to 355- solution
Material, processing and painting costs included
100,0 %
98,0 %
96,0 %
Ca 12%
94,0 %
92,0 %
90,0 %
88,0 %
86,0 %
84,0 %
82,0 %
355/355
11
date/month/year
420/355
550/355
550/550
www.ruukki.com | Firstname Lastname |
INTERNAL
700/355
700/700
Relative cost of 50m tubular truss compared
to 355- solution
Material, processing and painting costs included
Transport, erection and LCC not included!
100,0 %
98,0 %
96,0 %
Ca 12%
94,0 %
92,0 %
90,0 %
88,0 %
86,0 %
84,0 %
82,0 %
355/355
12
date/month/year
420/355
550/355
550/550
www.ruukki.com | Firstname Lastname |
INTERNAL
700/355
700/700
Hollow section trusses
Optim 500MH - Optim 700MH
S500MH and S700MH hollow sections can be used in the same way as
S355-S420 hollow sections.
A SSAB design guide based on bending and K-joint tests has been prepared in
order to show that:
− Plastic member resistance can be used in cross section classes 1-2
− Tubular welded joint design can be carried out according to EN1993-1-8
and EN1993-1-12
13
11/02/2015
www.ruukki.com | Ilkka Sorsa
Axial resistance of double grade hollow
sections
An extensive test series with
double grade hollow sections
have been carried out in
Lappeenranta technical university
Conclusion of the study is that a
buckling curve b for SSAB double
grade hollow sections can be
used instead of c within certain
geometrical limits that are
presented in the design guide
14
11/02/2015
www.ruukki.com | Ilkka Sorsa