New Materials :
High Mn Steels www.posco.com Headquarters TEL : 82-54-220-0114
Seoul Office TEL : 82-2-3457-0114
www.daewoo.com
www.poscoengineering.com
www.poscoplantec.co.kr
www.rist.re.kr
Pohang Works TEL : 82-54-220-0114
www.poscoenc.com
Gwangyang Works TEL : 82-61-790-0114
New Materials :
High Mn Steels
Contents
Profile 04 Introduction of Pohang and Gwangyang Works 06 Manufacturing Process 08 Quality Management System 10 R&D
Product Portfolio 14 New Materials : High Mn Steels High Mn Cryogenic Steel High Mn Martensitic AR Steel High Mn Austenitic AR Steel High Mn Non-magnetic Steel
34 Global Network
POSCO Gwangyang Works
New Materials : High Mn Steels
Profile • Product Portfolio • Global Network
Pohang Works
Pohang Works
Gwangyang Works
Major Products : Hot rolled steels, plates, cold-rolled steels, wire rods, electrical steels, stainless steels, and linepipe steels, etc. Crude Steel Production : 16,185,000 tons(2013)
Major Products : Hot-rolled steels, cold-rolled steels, automotive steels, plates, and linepipe steels, etc. Crude Steel Production : 20,231,000 tons(2013)
POSCO Five Consecutive Years "The World's Most Competitive Steelmaker" by WSD RANK
Introduction of Pohang and Gwangyang Works
COMPANY
SCORE
1
POSCO(Korea)
7.91
2
Nucor(USA)
7.55
3
NSSMC(Japan)
7.49
4
Gerdau(Brazil)
7.34
5
Severstal(Russia)
7.31
6
NLMK(Russia)
7.14
7
JSE Steel(India)
7.12
Pohang
8
JFE(Japan)
7.10
JAPAN
9
Hyundai(Korea)
7.05
10
Erdemir(Turkey)
7.03
CHINA
KOREA
Gwangyang
Year : 2014
Brief History 2013 #3 FINEX, Indonesia Mill Completed 48Mt
2000 Privatization
40Mt
1992 Gwangyang Works Completed 1988 IPO
1968 Established
1981 Pohang Works Completed
trillion KRW
28.1Mt 2010 POSCO Plantec
20.8Mt 2008 POSCO ENG
13.1Mt 1994 POSCO E&C
04
1968 1975
70
50
30
1Mt
Gwangyang Works
2010 Daewoo Int’l
10
1981
1987
1993
1999
2008
2010
2014 05
New Materials : High Mn Steels
Profile • Product Portfolio • Global Network
Facilities Pohang Works
Gwangyang Works
Plate Mill 1
Plate Mill 2
Plate Mill 3
Plate Mill 1
Manufacturing Process
Operation
Jul. 1972
Feb. 1978
Nov. 1997
Aug. 2010
Capacity(ton/y)
620,000
2,700,000
1,180,000
2,500,000
Thickness(mm)
6~120
6~200
4.5~200
8~200
Max. Width(mm)
3,100
4,500
4,000
5,300
Max. Length(mm)
15,500
25,000
25,000
25,000
Max.(Net Weight)
-
25ton
-
28ton
Mill Power
3,600ton X 1
7,200ton x 1(RM) 9,000ton x 1(FM)
8,000ton X 1
12,000ton X 2
POSCO produces a variety of steel plates with the state-of-the-art facilities.
Accelerated Cooling Control System
-
Multi Jet Type (4.7m x 28m)
Multi Jet Type (4.2m x 24m)
Multi Laminar Jet Type (5.5m x 24m)
Mechanical Shear
-
50mmt
-
50mmt/Slitter
UT
Longitudinal Tester(NDT)
Transverse Tester(SMT)
Transverse Tester(SMT) Longitudinal Tester(NDT)
Longitudinal Tester(NDT)
Heat Treatment Equipment
-
NQT x 1, Nor’ Only x 1 (400,000ton) Batch(30,000ton)
Nor’ Only x 1 (200,000ton)
NQT x 1(200,000ton, Oct. 2011) Batch(30,000ton)
Main Product
Mild Steel
High Strength Steel (TMCP, Nor’, QT)
High Strength Steel (TMCP, Nor’)
High Strength Steel (TMCP, Nor’, QT)
Converter Cooling Bed Warehousing Hot Leveler
Crop Shear
Double Side Shear
Continuous Casting
Ultrasonic Test Accelerated Cooling Finishing Mill
Cold Leveler Dividing Shear
Marking / Inspection
Roughing Mill Heat Treatment
Reheating Furnace
Shot Blast Cold Thickness Guage
06
07
New Materials : High Mn Steels
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Inspection Flow of Steel Plate
Reheating Furnace
Roughing Mill
Slab Inpection thickness · width · length · weight
Finishing Mill
Plate Thickness Measure
Cooling Bed
Hot Leveler
Accelerated Cooling
Surface Inspection scale · roll mark
Crop Shear
Quality Management System
Double Side Shear
Dividing Shear
Cold Leveler
Ultrasonic Test
Size, Surface, Shape Inspection
Internal Defect Inspection
POSCO guarantees the quality of its products via effective quality management system. Heat Treatment
Certifications of Quality Management System
Application Product Institute
Shipping
Renewal
LRQA(UK) Every year Regular Inspection ISO9001 Flat Product Every 3 years, Certificate Renewal
Finishing / Inspection & Warehousing
Internal Inspection
LRQA(UK) Every year Regular Inspection ISO14001 Environmental Management System Every 3 years, Certificate Renewal Certifications of compliance of the quality system with ISO 9001, 14001
08
09
New Materials : High Mn Steels
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Organization
R&D POSCO increased investment in the field of R&D during the period of economic downturn with the goal of strengthening the competitiveness of its key products in embracing the global market recovery.
Next Generation Technology Research
Steel Research
Family R&D Collaboration
* RIST : Research Institute of Industrial Science & Technology
(GIFT, GEM) Seed Research & Education
* POSLAB : POSCO Technical Research Laboratories
* POSTECH : Pohang University of Science and Technology * GIFT : Graduate Institute of Ferrous Technology * GEM : Graduate School of Engineering Mastership
Pohang Research Lab & ESC*
Process & Engineering Technology • Fine Ore Reduction Process • Compact Endless Casting-rolling Mill • POSCO Strip Casting
Songdo R&BD-E Center Songdo PAC*
Seoul Office
KOREA * ESC : Engineering Solution Center
Products Development • High Performance Automotive Steels • High Mn Steel • High Formable Stainless Steel • High Strength Offshore Structure Steels
Pohang Works
* PAC : Products Application Center Gwangyang Works
Gwangyang Research Lab
EVI Activity • Steel Solutions for Energy & Shipbuilding - BCA(Brittle Crack Arrest) Guarantee Solutions - High Heat Input Welding Solutions
10
11
New Materials : High Mn Steels
Product Portfolio
14 New Materials : High Mn Steels High Mn Cryogenic Steel High Mn Martensitic AR Steel High Mn Austenitic AR Steel High Mn Non-magnetic Steel
12
13
New Materials : High Mn Steels
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Chemical Composition and Mechanical Properties of Plate New Materials :
High Mn Cryogenic Steel
■ Products Available : Plate(12~60mmt) ■ Chemical Composition
Recently, the new high manganese austenitic steel plate and welding consumables possessing excellent combination of strength and cryogenic toughness have been developed without additional costly element, Ni. And they offer an attractive alternative to cryogenic applications.
Unit : wt.%
C
Mn
Si
Cr
S
Others
0.35~0.55
22.0~26.0
0.3max
3.0~4.0
0.01max
-
■ Mechanical Properties Charpy Impact Energy @ -196˚C(J) YS(MPa)
UTS(MPa)
El.(%)
800~970
≥400
Transverse
Longitudinal
≥22
≥41
≥22
Cryogenic Properties of Plate ■ Strength and Toughness
-163˚C
1,200
-100˚C
1,000 800
25˚C
600 400
Temp.(˚C) YS(MPa) UTS(MPa)
200 0
10
EI.(%)
25
470
901
54
-100
569
1,038
49
-163
691
1,125
45
20
30
40
Eng.Strain(%)
14
Charpy Impact Energy(J)
Eng.Stress(MPa)
The high manganese steel is designed to have high strength and toughness at cryogenic temperature by appropriate strengthening mechanisms and controlled manufacturing processes.
50
350 L-dir.
300 250 200 150
T-dir.
100 50
60
0 -250
-200
-150
-100
-50
0
50
Temperature(˚C)
15
New Materials : High Mn Steels
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Flux-cored Arc Welding Consumable for High Mn Steel(PT-400M/HM ) TM
Comparison with Conventional Materials for Cryogenic Applications
1,000 900 800 700 600 500 400 300 200 100 0
■ Description and Application at 25˚C High Mn
9%Ni
AISI304
AI5083-O
0
10
20
30
40
50
60
Charpy Impact Energy(J)
Eng.Stress(MPa)
■ Strength and Toughness
70
400 350
High Mn
300 250
9%Ni
200 150 100 50 0 -250
AISI304
■ Welding Position
-200
-150
-100
-50
0
50
1.2
at -163˚C
1.0 AISI304
0.6 0.4
High Mn
AI5083-O
0.2 0
Corrosion Rate (mm/year)
■ Corrosion Resistance
9%Ni
0.1 0.08
■ Chemical Composition of Wire
Immersion corrosion test(ASTM G31) Test condition : 3.5% NaCl at 25˚C for 14days
0.06
High Mn
9%Ni
0.07C-1.5Mn
CTE(10-6/˚C)
30
20 AISI304
15
9%Ni
10 High Mn
5 0
-225
-175
-125
-75
-25
0
Name
C
Mn
Ni
Cr
Fe
Etc.
PT-400MTM
0.2~0.5
2.0~8.0
25~35
Max 4.0
Bal.
Mo
PT-400HMTM
Max 0.25
18~24
4~8
1.5~4
Bal.
Mo, W
0.02
■ Coefficient of Thermal Expansion(CTE) and Elastic Modulus
AI5083-O
Unit : wt.%
0.04
0
Materials
25
- DCEP(DC+) - 80%Ar+20%CO2
Temperature (˚C)
■ CTOD
0.8
■ Polarity and Shielding Gas
AI5083-O
Eng.Strain(%)
CTOD(mm)
PT-400M/HMTM is an Fe-Ni-Mn based flux-cored wire for welding high Mn steel and Ni-Cr-Mo alloys. Satisfies stringent toughness requirement at cryogenic temperature. Stable arc with minimal spatter. No need to pre-heat and control maximum interpass temperature at 150℃ or lower.
450
Materials
Young's Modulus (GPa)
Shear Modulus (GPa)
High Mn
175
69
AISI304
201
78
9%Ni
195
76
Al5083-O
73
28
■ Mechanical Properties of All-weld Metal Name
YS(MPa)
UTS(MPa)
EI.(%)
Charpy Impact Energy @ -196˚C(J)
PT-400MTM
≥360
≥600
≥22.0
≥27
PT-400HMTM
≥400
≥660
≥22.0
≥27
■ Packing(Wire) Diameter(mm) Weight(kg)
1.2
1.4
1.6
5, 12.5, 15, 20
25
Temperature (˚C) FCA welding consumable for High Mn Steel
16
17
New Materials : High Mn Steels
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Submerged Arc Welding Consumable for High Mn Steel(PC-400M )
TIG Arc Welding Consumable for High Mn Steel(T-400M )
TM
TM
■ Description and Application
■ Description and Application
TM
PC-400M is a high Mn based metal-cored wire for welding high Mn steel and Ni-Cr-Mo alloys. POS-CF1TM is an agglomerated and slightly Mn-alloyed aluminated basic flux for single/multipass welding. Satisfies the stringent toughness requirement at cryogenic temperature. Good arc stability and bead appearance with high travel speed. No need to preheat and control maximum interpass temperature at 150˚C or lower.
■ Welding Position
■ Polarity and Flux
T-400MTM is an Fe-Ni-Mn based TIG wire for welding high Mn steel and Ni-Cr-Mo alloys. Satisfies stringent toughness requirement at cryogenic temperature. Stable arc with minimal spatter. No need to preheat and control maximum interpass temperature at 150˚C or lower.
■ Welding Position
■ Polarity and Shielding Gas
- DCEP(DC+), AC - POS-CF1TM
- DCEN(DC-) - 100% Ar with back shield
■ Chemical Composition of Wire (wt. %)
Unit : wt.%
Unit : wt.%
C
Mn
Ni
Cr
Fe
Etc.
C
Mn
Ni
Cr
Fe
Etc.
0.35~0.5
18~22
1~4
1.5~3.5
Bal.
Mo, W
Max 0.25
18~24
5~12
1.5~4
Bal.
Mo, W
■ Mechanical Properties of All-weld Metal
■ Mechanical Properties of All-weld Metal
NAME
YS(MPa)
UTS(MPa)
EI.(%)
Charpy Impact Energy @ -196˚C(J)
Name
YS(MPa)
UTS(MPa)
EI.(%)
Charpy Impact Energy @ -196˚C(J)
PC-400MTM / POS-CF1TM
≥360
≥660
≥22.0
≥27
T-400MTM
≥400
≥660
≥22.0
≥27
■ Packing(Wire) Diameter(mm) Weight(kg)
18
■ Chemical Composition of Wire
■ Packing(Wire)
■ Packing(Flux) 3.2
4 25, 50, 100,200
4.8
Type Weight(kg)
Can
Bag 20, 25
Diameter(mm) Weight(kg)
1.6
2.4
2.8
5, 10
19
New Materials : High Mn Steels
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High Mn Martensitic AR Steel New Materials :
High Mn Martensitic AR Steel Martensitic high Mn AR(Abrasion Resistance) plates were successfully developed by POSCO utilizing high Mn content and DQ technique. High Mn AR plates show excellent wear resistance with good thickness/hardness property. In 2013, the new AR plates were provided to heavy equipment fabrication company for commercial use. POSCO is currently developing higher grade AR plate including 450HB and 500HB.
■ Development Concept Reduced contents of high cost hardening alloying elements. Introduction of Mn to guarantee the hardenability. Controlled rolling for grain refinement.
Reduced delivery time : Non-heat treatment process Competitive weldability : Low contents of C
Advantages
Increased service life : Good through thickness hardness
Thermo-mechanically controlled rolling
Temperature
Temperature
■ Design Concept
Reheating/Quenching
Direct Quenching (DQ)
Time
Time
Conventional AR Steel Plates
High Mn AR Steel Plate
■ Applications Heavy equipment container(excavator and loader, etc.) Cargo box of hauler trucks in mining fields(oil sands and coal mining, etc.) High strength structural applications
■ Products Available : Plate(10~70mmt) ■ Chemical Composition
wt. %(Max.)
C
Si
Mn
P
S
Ceq
Pcm
0.15
0.5
5.0
0.015
0.008
0.63
0.29
■ Mechanical Properties
20
Thickness (mm)
Hardness (HB)
YS (MPa)
TS (MPa)
El. (%)
CVN(-40℃) (J)
Bending (180°, r=3.0t)
10~70
400
1,000
1,200
12
10~30
Passed
21
New Materials : High Mn Steels
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Properties of High Mn Martensitic AR steel
Welding Properties of High Mn Martensitic AR steel
■ Bending Property
■ Welding Property(CTS test)
Excellent bending property is required for buckets.
Welding conditions
Bending condition(180°, r=3.0t) Plate thickness (mm)
Specimen thickness (mm)
Result
12
12
Pass
35
15
Pass
50
15
Pass
Welding section
Current/Voltage
270A/31V
Welding Speed
30cpm
Heat Input
17kJ/cm
Shielding Gas
CO2 25ml/min
Welding Consumable
SM-70G Solid Wire
No Preheat & Welded at 9℃(50mmt)
CTS cracking test results : no cracking at room temperature
2.0 ASTM G65 1.8 1.6 1.4
310HB
1.2 1.0 0.8
402HB
402HB
386HB
Hardness(Hv)
Weight loss(g)
■ Wear Resistance and Through-thickness Hardness Profile 500
RT
50℃
75℃
100℃
125℃
150℃
Conventional AR Plate
25mmt
No Crack
No Crack
No Crack
No Crack
No Crack
No Crack
35mmt
No Crack
No Crack
No Crack
No Crack
No Crack
No Crack
50mmt
No Crack
No Crack
No Crack
No Crack
No Crack
No Crack
450 400 350 Surface
0.6 High Mn AR Plate
Preheat POSM_ AR_400
Conventional High Tensile AR Plate Steels
300
0
02
Center
03 04 Distance(mm)
Surface
05
50
■ Cross section of weldment(Butt welding)
■ Bucket Field Test(Breaking and loading stones) 9 mmt, no preheat, no crack
Commercial bucket requires reinforcement welding after 1 month service.
Affter 1 month
New bucket using High Mn AR steel shows service life longer than 2 months.
Before operation
22
After 1 week
After 2 months
41mmt, 75℃ preheat, no crack
50mmt, 100℃ preheat, no crack
23
New Materials : High Mn Steels
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High Mn Austenitic AR Steel New Materials :
High manganese austenitic AR plate was developed using high strength and strain rate. This austenitic high manganese AR plate can be fabricated into various product types such as pipe. Excellent durability at low temperature can be guaranteed by carbide control technology.
High strength and strain hardening rate can improve the wear resistance in severe abrasion condition Alloy compositions and manufacturing parameters were optimized to increase strength and strain hardening rate in austenite. Especially, carbide control is the key technology for high strength and toughness. Stress(MPa)
High Mn Austenitic AR Steel
■ Development Concept
1200 1000 800 600 400 200 0
0
10
20
30
40
50
Strain(%)
Fully austenitic microstructure
■ Applications Slurry transportation pipelines for mining facility(ore and coal, etc.) Parts for mining equipments(chute liner, screen)
■ Products Available : Plate(10~40mmt) ■ Chemical Composition
wt. %(Max.)
C
Si
Mn
S
Ceq
0.15
0.5
20
0.008
0.63
■ Mechanical Properties Thickness (mm) 10~40
24
Hardness (HB)
Y.S (MPa)
T.S (MPa)
El. (%)
CVN(-40℃) (J)
Bending (180°, r=3.0t)
250
≥ 550
≥ 1,100
≥ 40
70~100
Passed
500
25
New Materials : High Mn Steels
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Submerged Arc Welding Consumable for High Mn Steel(PC-400SLTM)
Wear Properties of High Mn Austenitic AR Steel
1.0
Weight Loss (mg)
Weight Loss (mg)
■ High Mn steel plate shows better wear resistance than API-X70
0.8 0.6 0.4
DO : 3.26ppm(Air) DO : 2ppm
0.8
DO : 1ppm
0.6
PC-400SLTM is an Fe-Ni-Mn based flux-cored wire for welding high Mn steel and Ni-Cr-Mo alloys. Satisfactory strength and wear resistance at severe abrasion condition. Stable arc with minimal spatter. No need to preheat and control maximum interpass temperature at 150˚C or lower.
0.4 0.2
0
0
API-X70
Slurry Pot Tester
1.0
0.2 High Mn Steel
■ Description and Application
■ Welding Position API-X70
AISI 410UF
ASTM G65
API-K55
■ Polarity and Flux - DCEP(DC+) - POS-CF1TM
High Mn Steel
Slurry Pot Test
■ Shot Blast Operation Result High Cr Cast Iron
Martensitic AR Steel
Austenitic AR Steel
Before test
■ Chemical Composition of Wire
Unit : wt.%
C
Mn
Si
P+S
Fe
Etc.
0.3-0.6
18~22
02-0.8
Max. 0.015
Bal.
Cr, Mo, Ti, B
■ Mechanical Properties of All-weld Metal
2 months after
[A schematic view of shot blast room]
Name
YS(MPa)
UTS(MPa)
EI.(%)
Charpy Impact Energy @ -196˚C(J)
PC-400SLTM / POS-CF1TM
≥465
≥750
≥16
≥40
Severely worn out Shot ball
6 months after Entrance
No trace of wear
Exit Shot ball
■ Packing(Wire)
(A schematic view of shot blast room) [A schematic view of shot blast room]
Diameter(mm) Shot ball Entrance
Weight(kg) Exit
Shot ball
26
■ Packing(Flux) 3.2
4.0 25
4.8
Type Weight(kg)
Can
Bag 20, 25
High Cr High Crcast cast iron block iron block
27 High Cr cast
New Materials : High Mn Steels
Metal-cored Arc Welding Consumable for High Mn Steel(PX-400GTM) New Materials :
High Mn Non-magnetic Steel
■ Description and Application PX-400GTM is an Fe-Ni-Mn based flux-cored wire for welding high Mn steel and Ni-Cr-Mo alloys. Satisfactory strength and wear resistance at severe abrasion condition. Stable arc with minimal spatter. No need to preheat and control maximum interpass temperature at 150˚C or lower.
■ Welding Position
High Mn non-magnetic steel plate was also developed by POSCO. High Mn non-magnetic steel plates show higher strength and more excellent magnetic stability, formability, fatigue property, machinablity and weldability than 304 stainless steel.
■ Polarity and Shielding Gas - DCEP(DC+) - 80%Ar+20%CO2
■ Chemical Composition of Wire
Unit : wt.%
C
Mn
Si
P+S
Fe
Etc.
0.3-0.6
18~24
0.1-0.5
2~8
Bal.
Ni, Ti, B, W, N
■ Mechanical Properties of All-weld Metal Name
YS(MPa)
UTS(MPa)
EI.(%)
Charpy Impact Energy @ -196˚C(J)
PX-400GTM
≥465
≥750
≥16
≥40
■ Packing (Wire) Diameter(mm) Weight(kg)
1.2
1.4
1.6
12.5, 15, 20
Microstructure of weld joints
28
29
New Materials : High Mn Steels
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High Mn Non-magnetic Steel
Properties of High Mn Non-magnetic Steel
■ Strength
■ Magnetic Stability Austenite phase is maintained as strained to be fractured. Good candidate for non-magnetic structural applications Immediately after strained, magnetic permeability of 304 stainless steel rapidly increases due to the mechanically induced phase transformation(magnetic phase, α martensite).
Excellent combination of strength and elongation. Easily strengthened by changes of alloying and process conditions maintaining magnetic permeability. Manufactured by as-rolled process only(no heat treatment required).
1000 800 600 400
Type 304 Stainless Steel
200
1.12
Type 304 Stainless Steel Type 304 Stainless Steel
1.08
1.04
0
10
20
30
40
50
60
70
High Mn NonMagnetic Steel 0
80
10
Eng. Strain(%)
35,000 30,000
γ(111)
25,000
1.00
0
High Mn Non-Magnetic Steel Intensity
High Mn NonMagnetic Steel
Intensity
1200
Magnetic Permeability(m)
Eng. Stress (MPa)
(Change of Magnetic Permeability)
20
30
40
Eng. Strain(%)
15,000
50% 40%
10,000
20%
■ Applications
60
70
2 Theta(Degree)
Inner parts and body of industrial power transformers(Lock plate, housing, side clamp, tank wall, etc.) Cover of industrial power distributor. Parts for non-magnetic equipments such as electric furnace parts
80
50% 40% 20% 10% 5% 0%
10,000 5,000
5%
50
γ(200)
15,000
0%
40
30,000
20,000
10%
5,000 0 30
γ(111)
35,000
25,000
a (110) γ(200)
20,000
40,000
90
100
0 30
40
50
60
70
80
90
100
2 Theta(Degree)
■ Formability ■ Products Available : Sheet(4~11.9mmt), Plate(12~40mmt)
High Mn non-magnetic steels show excellent formability due to high uniform elongation. [Bending Test(d=2a, 180º)]
■ Chemical Composition
wt. %(Max.)
C
Si
Mn
P
S
0.3~0.5
0.3
22~26
0.03
0.01
Material
Result
High Mn Steel
Pass
■ Mechanical & Magnetic Properties Thickness (mm)
YS (MPa)
TS (MPa)
El. (%)
Bending (180°, r=2t)
Magnetic Permeability(μ)
4~40
≥350
800~970
≥22
Passed
1.002
No cracks observed
30
31
New Materials : High Mn Steels
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Flux-cored Arc Welding Consumable for High Mn Non-magnetic Steel
Flux-cored Arc Welding Consumable for High Mn Non-magnetic Steel
(PT-400NM )
(PT-400NM )
TM
TM
■ Description and Application
■ Welding Consumables
TM
PT-400NM is an Fe-C-Mn based flux-cored wire for welding high Mn non-magnetic steels. Satisfactory toughness and non-magnetic properties after welding. Stable arc with minimal spatter. No need to preheat and control maximum interpass temperature at 150˚C or lower.
■ Welding Position
High Mn based welding consumables for non-magnetic use are developed with cost effectiveness. Welding position
■ Polarity and Shielding Gas
Unit : wt.%
C
Si
Mn
Cr
Fe
0.1~0.3
0.2~0.8
19~25
Max 2.0
Bal.
TS(MPa)
El.(%)
2G
479
644
43.90
82
77
3G
458
653
48.66
86
96
FACE
Bending
CVN@-29℃(J)
YS(MPa)
2F
- DCEP(DC+) - 80%Ar+20%CO2
■ Chemical Composition of Wire
All-weld
Fracture Test
Face
Root
78
OK
OK
92
OK
OK
No Defect
HMS
SM400
HMS
HMS
ROOT
■ Mechanical Properties of All-weld Metal Name
YS(MPa)
UTS(MPa)
EI.(%)
Charpy Impact Energy @ -196˚C(J)
PT-400NMTM
≥360
≥600
≥22.0
≥27
■ Packing(Wire) Diameter(mm) Weight(kg)
32
1.2
1.4
1.6
5, 12.5, 15, 20
33
New Materials : High Mn Steels
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34
35
New Materials : High Mn Steels
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Global Network We designate one trading company per customer.
36
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New Materials :
High Mn Steels www.posco.com Headquarters TEL : 82-54-220-0114
Seoul Office TEL : 82-2-3457-0114
www.daewoo.com
www.poscoengineering.com
www.poscoplantec.co.kr
www.rist.re.kr
Pohang Works TEL : 82-54-220-0114
www.poscoenc.com
Gwangyang Works TEL : 82-61-790-0114
