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Application of Sustainable
High Performance Steel in Structures
2017. 11. 27
POSCO
Steel Structures Research Group
2017 ASEAN Iron and Steel Sustainability Forum
2/14
POSCO
Since 1968 POSCO have been growing into a Global company
World’s No. 1, 2 production capacity single mill
Founded in 1968, growing to a global company ...
30
20
10
1980 1990 20001970 2010
’10 : 33.0 M tpy
’73 1st Phase Constr. atPohang Completed(1.03 M tpy)’68
Est.
’83 Pohang SteelworksConst. Completed(9.1 M tpy)
’92 Gwangyang Steelworks Const. Completed (20.8 M tpy)
’94 Listed on the NYSE(1st Korean Company)
’00 Privatization
‘13 : 36.4 M tpy
‘14 : 37.7 M tpy
Global Recognition as the Most Competitive Steel Company
Gwangyang Works
Pohang Works
Prod.(M tpy)
Crude Steel Production
‘15 : 37.9 M tpy
‘16 : 37.5 M tpy
Pohang Works
(16.7M tons) 2nd largest in the World
(21.2M tons) The largest in the World
3/14
POSCO
Global network to ensure stable steel supply
Stabilized global steel supply chain
JAPAN- 6 Processing centers
ASEAN-9 Production plants-20 Processing centers
CHINA- 7 Production plants- 10 Processing centers
EUROPE- 4 Processing centers
PT.POSCO Resources Indonesia
Global production plant : 18
Global coil processing center : 46
POSCO-IAPC
As of 2014
AMERICA- 2 Production plants- 6 Processing centers
POSCO India POSCO SouthAsia
POSCO-Maharashtra
POSCO-ESI
VPS
POSCO-Vietnam
POSCO SS VINA
POSCO-VST
POSCO-Malaysia
PT.Krakatau POSCO
Myanmar-POSCO
POSCO-TSC
POSCO-Thainox
POSCO-TNPC
POSCO-IPPC
POSCO-ICPC
POSCO-IDPC
POSCO-TBPC
POSCO-VNPC
POSCO-VHPC
POSCO-MKPC
POSCO-IJPC
Local to Global
ASEAN
TSC-HoChiMinh
POSCO-KL
TSC- Jakarta
India TSC
TSC-Delhi
TSC-Chennai
Global production plant : 19
Global processing center : 32
Global TSC (Technical Service Center) : 22
POSCO’s Global network consists of 182 companies in over 50 countries
4/14
POSCO
POSLAB
Gwangyang Research Lab.(3 Research Gr.)
Steel Business Div.
Product Application Center(4 Research Gr.)
POSLAB
Pohang Research Lab.(5 Research Gr.)
POSCO Center Personnel : 990 Budget : 512 million USD
RIST
POSTECH(GIFT, GEM)
POSLAB : POSco technical research LABoratoriesRIST : Research Institute of industrial Science & TechnologyPOSTECH : POhang university of Science and TECHnologyGIFT : Graduate Institute of Ferrous TechnologyGEM : Graduate school of Engineering Master
R&D in steel and application
Developing innovative steel and application technology
Global R&D Center - Steel Solution Marketing
- Application Technology
POSLAB (Gwangyang) - Steel technology
POSLAB (Pohang) - Steel technology
5/14
POSCO in Construction
POSCO provides various innovative steel solutions in construction industry
High-rise
Buildings
Cable Bridges
Space structure
Steel Bridges
Modular housing
Road Facilities
Airport/Stadium
Poles/ Guard rail /
Noise barrier
Const. products
Pile foundation
Support/Scaffolding
Pipe piles/ Sheet piles
Structure/curtain wall etc.
6/14
POSCO in Construction
POSCO provide engineering & construction steel solutions
High performance steel Material Engineering
Steel Solutions Performance Verification
Full Scale Bending Test Nonlinear Analysis of Test
Develop application technology
- Welding/bolting, code/spec. etc.
WP
steel
Application
Tech.
Code,
Spec.
Optimize design using HSA/HSB
- Design optimization
- Hybrid design
- Connection details
- Standard designs
- BIM lib. / Database
Develop steel products & systems
- Downstream biz., cooperation w/
clients (Patents)
- Composite col./ beam / girders
Structural performance evaluation
- Structural analysis
- Structural test(fatigue/full scale)
U section
H section
Hybrid design
7/14
Providing Values using Steel Structure
Reduce weight Increase Space
Improve Fabrication Increase Constructability
Apply high strength steel
- YS: 380/460/690MPa HSB*
within serviceability limit
Reduce lifting weight
Longer span (w/ low girder height)
Lower floor height (more stories)
Use high performance steel
- TMCP* steel - good weldability
: Low Ceq, low preheat temp.
Optimize for fabrication
- Min. size variations
- Min. small pieces
- Optimize procurement
Stable during erection
System erection : Prefabricated
Easy site connection
U section
H section
* Thermo Mechanical control process
* High performance
Steel for Bridges
BESTI beam
8/14
Providing Values using Steel Structure
Sustainability Accelerated Construction
No long-term deterioration
- Fatigue considered during design
Min. maintenance during lifespan
- Weathering steel
: No paint (re-paint) needed
- Integral substructure (jointless)
100% recyclable material
- LCA analysis
Fast construction
- Min. total construction time
: Replacement of deteriorated bridges
New erection methods
Modular system (standardized)
Min. traffic control
- Min. on-site construction
- Min. lane closure
: Erection of overpass
Prefabricated systems
Rural area
- Fast/Easy delivery : Mobility
9/14
High performance Weathering Steel (HSB-W)
Introduction
High Performance Weathering Steel for Bridges (HSB-W)
- Low alloy steel(Cu, Cr, Ni) at atmospheric environment fine adherent protective rust
forms on steel surface that inhibits further corrosion
- High performance as HSB (low temp. toughness, weldability etc.)
Crack
Fe3O4 녹층
Steel
Protecctive rust layer
Cr α-FeOOH Fe3O4
Steel Corrosion developing
YR
4M
RB
3yr
Dark Brown
7yr
HSB380W HSB460W HSB690W
Max. thickness 100mm 100mm 80mm
YS 500MPa 600MPa 800MPa
TS 380MPa 460MPa 690MPa
Toughness -5℃ 47J -20℃ 47J
Ceq 0.47 0.47 0.60
Pcm 0.22 0.22 0.27
Other spec. HPS345W, A709-50W, A588-Gr.B, S355J2W
Weathering steel Conventional steel
10/14
High performance Weathering Steel (HSB-W)
Performance verification
Structural test
- Ultimate behavior and fatigue performance
Corrosion test (Cyclic Corrosion Test)
- 1% salt water CCT
SM520B
HSB600W
HSB500용착부
HSB500W
SMA490W
Test periods (cycle)
0 20 40 60 80 100 120 140 160
Wei
gh
t lo
ss (
g/c
m2 )
0.00
0.01
0.02
0.03
0.04
0.05
0.06
HSB500(weld)
SMA490W
HSB500W
SM520B
HSB600W
SM520B HSB500W
: 56% vs SM520
EPMA analysis
11/14
High performance Weathering Steel (HSB-W)
Performance verification
Corrosion field test
- 8yrs database
Corrosion field test
- Box girder test
- Plan to compare with site monitoring data
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Accelerated Bridge Construction(ABC)
Accelerated Construction
Min. total construction time
- Replacement of deteriorated bridge
SPMT Sliding
13/14
Accelerated Bridge Construction(ABC)
Accelerated Construction
Min. on-site construction
- Min. traffic control (lane closure/traffic delay)
Mobility for rural area
- Prefabricated & easy delivery
Crane erection: 10min full closure / girder ILM
Bent girder modules were shipped to Indonesia
Girders+Precast deck shipped on barges
(Vietnam)
