POSCO High Mn Steels

2015. 06. 18

Steel Solution Marketing Department

I. POSCO Overview

II. High Mn Steel

III. Applications

IV. Summary

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

I. POSCO overview : POSCO History

Prod.(M tpy)

Crude Steel Production

1 POSCO (S. Korea)

The World’s Most Competitive Steel Maker

I. POSCO overview : POSCO History

Profile

Leading Steel Producer

Highly Diversified Products

Strong Financials

+=

Downstream business

Cheaper logistics

cost

Prompt delivery

Financial support

Welding technology

Painting technology

Parts evaluation

Forming technology

+Product Application

Tech.Commercial

Support

2014

2015

Global EVI Forum 2014

Application Technology

Application Tech. + Commercial Support

• Upgraded application tech.

• POSCO family support

• Downstream biz.

• Steel solution marketing

• Steel marketing

• Steel production

Definition

I. POSCO overview : Solution Marketing

Unique properties of high Mn steels

Low permeabilityof hydrogen

High work hardening rate

High stabilityof austenite

High fraction ofε-martensite

TWIP(Excellent strength & elongation)

Wear resistance High resistance to blast

Good low temperature toughness Non-magnetism

High resistance to

hydrogen embrittlement

Excellent absorption of externalimpact energy (high damping capacity)

Automobile,Wear resistant equipment(Slurry pipe, Heavy machinery),

Blast resistant door

LNG tank and pipe,Non-magnetic equipment

Hydrogen tank,Sour resistant pipe

Damping(Floor panel, Ship,

Steel stair)

II. POSCO High Mn steel : Performance

TWIP steel for U-AHSS

Automotive Steels in POSCO

AHSS, X-AHSS, U-AHSS

AHSS: Advanced High Strength Steels

DP, TRIP, CP, Martensite, etc.

X-AHSS: eXtra-Advanced HSS

25,000 MPa·% < TSxEl < 50,000 MPa·%

U-AHSS: Ultra-Advanced HSS

TSxEl > 50,000 MPa·%

TWIP steel: TS 1,000MPa, El. 65%

[Patent, 1995~, 2006]

III. Applications of High Mn steel : Automotive

High strength and excellent elongation for automotive parts

Front crash part Bumper beam

No crack under axial compressive strain 75%

Applications of TWIP steel

III. Applications of High Mn steel : Automotive

Front part with the improved crashworthiness

New Panda (FIAT)

World first application: FIAT (Italy)

Bumper beam

weight reduction & cost saving

Cryogenic high Mn steel

III. Applications of High Mn steel : Cryogenic service

○ Chemical composition and mechanical properties

○ Comparison with conventional cryogenic materials

Application for LNG industry

LNG storage tank Collaboration with customers

LNG carrier, LNG bunkering, on-shore terminal

Total cost reduction about 30~50%

JIP: shipbuilding company & 5 class societies

III. Applications of High Mn steel : Cryogenic service

LNG carrier LNG bunkering

LNG station LNG terminal

III. Applications of High Mn steel : Wear resistant service

○ Chemical composition and mechanical properties

○ Bending and welding properties

Wear resistant High Mn steel

III. Applications of High Mn steel : Non-magnetic material

○ Chemical composition and mechanical properties

○ High strength and good magnetic property

Non-magnetic High Mn steel