6 7

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Tailgate

Body side inner

Floor panel

Rear door

Front door

Shock tower

Seat crossmember

Front rail

B-pillar

Side member

A-pillarFront fender inner

In-service performanceTechnical performance

Weight Total cost of the function 2

- S

tam

pin

g o

f ta

ilor

w

eld

ed

bla

nks

í

í

í

í

í

í

8 9

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

LWB solutionHinge reinforcement+ =Inner panel

Nesting of tailor welded blankTailor welded blankMonolithic

+

Scrap Scrap

Thickness 0.7 mm

Steel grade

ArcelorMittal 04 HDG

2 blanks / cycle 8 blanks / cycle

Thickness 1.75 mm

Steel grade

ArcelorMittal 04 HDG

Thickness 0.65 mm

Steel grade

ArcelorMittal 04 HDG

Thickness 1.5 mm

Steel grade

ArcelorMittal 04 HDG

Monolithic post assembly solution LWB solution with same technical properties

2 200 1 500 850

600

350

+1 860

1 100

710

1 1

00

+++

10 11

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

12 13

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Transpo rt cost

Le

s

rot

Transportation

costs

Intermediate

inventory decrease

y

y

/y

Cycle time

improvement

Flow management

improvement

Working Capital

improvement

At equivalent technical performance: - cost saving of 5% - weight saving of 1kg/part

Monolithicpost-assembled

solution

∆ Material ∆ Cutting ∆ Stamping ∆ Assembly LWB solution

Total cost index140

0

20

40

60

100

120

80

95

Total cost comparison

1 62b 3 4b2a 4a 5- -

Typical part manufacturing process without tailor welded blanks

Manufacturing process with tailor welded blanks

Cash out Cash out Cash in Cash in

In-lineassembly

Stamping

2a 3 4a 5 1

2b 4b 6

Cutting

Assembly of components

Stamping

N.B.: the much shorter lead time between cash out and cash in which significantly reduces working capital requirements.

∆ WCR ∆ WCR

StampingCutting

In-lineassembly

14 15

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Overlap of approx. 20 mm Butt laser weld line without any overlap

16 17

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Ductile zone

Strong zone

80 mm

300 mm

80 mm

Spot weld

Laser weld

1

2

3

5

4

1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005

HSSintroduction

LWB linkedwith HSS

LWB linkedwith VHSS

Weight

+ Safety

+ Cost reduction

0

0

1

1 4

2

24

4

148

4

9

MS

HSS

VHSS

UHSS

= 14 TWB14

LWBwith UHSS

18 19

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

20 21

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Fulfill all conventional technical requirements

Dedicated ArcelorMittal Tailored Blanks process required

800700600450800/1000600450<450Level

< 450

450

600

800/1000

600

800/1000

700

800

500

1500

1500

DDQ / HSS<450 Ductibor®TRIPDualphaseMultiphase Usibor®

DDQ /

HSS

<450MPa

Multi

phase

Dual

phase

TRIP

Ductibor®

Usibor®

450

500800/1000

Integration of functions

Material saving by nesting

ol of deformation zones

eased stiffness by continuous welds

Integration of functions

Material saving by nesting

ol of deformation zones

eased stiffness by

continuous welds

A full range of weldable AHSS

LWB

LWB

in AHSS

Material savings

are enhanced when

the price for the

steel is high

Even more functions

can be integrated

ength

and fo rmability

in one part

W eight saving due

to reduced thickness

Improved crash

resistance

Resistance to peak

loads

22 23

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

1600

0

200

400

600

800

1000

1200

1400

UTS (MPa)

6

0

1

2

3

4

5

Conventional

process

1.47/1.47 1.47/1.47ArcelorMittal Tailored Blanks

dedicated process

EI (%)

Usibor® 1500P 1.47mm

+

Usibor® 1500P 1.47mm

UTS (MPa)

EI (%)

24 25

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Body side

Pillars

BumperBeam

Roof reinforcement

Front rails

Rear rails

Door ringTunnel reinforcement

2

2

Usibor® 1500P

T: 1.2mm

Ductibor® 500P

T: 1.5mm

2

2

1

1

40 60 80 100

Weight of

the perimeter

Rear impact

intrusion

Reference

Tailored Blanks proposal

- 38 % in weight

- 4.1 kg / vehicle

No cost penalty

HSS

T: 2.0mmIllustration: courtesy of Volkswagen

SuperLightCar European project

26 27

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

28 29

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Increased stiffness contribution

Lighter finished part

Less visible weldline in finished partNo nesting

losses

Less welddisplacementduring stamping

Tailgate

Wheel house

Body side

Floor panel

Rear door

Front door

Shocktower

B-pillar

Engine cradlecross member

Cross member

Sidemember

Bumperreinforcement

Roof reinforcement

Seat crossmember

Front rail

A-pillarFront fender inner

Tunnel reinforcement

Rear rails

30 31

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

A-pillar upperreinforcement

Front fenderinner

A-pillar lowerreinforcement

Roof rail

Post assembledwindow frame

No nesting losses,efficient welding

32 33

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

ement

A-pillar lowereinforcement

34 35

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

A B

36 37

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

5 parts

37 % engaged material savings

1.0 mm

2.0 mm

1.5 mm

2.0 mm

Weld hidden by wrap-over door

38 39

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

Integration

of tunnel

reinforcements

Integration

of cross member

closing plate

nts

mber

40 41

I -

Tailo

red

Bla

nks

va

lue

pro

po

sal

E

E

E

E

E

Tailgate

Wheel house

Body side

Body

side outer

Front rail

Floor panel

Tunnel

reinforcement

Rear door

Front door

B-pillar

A-pillar

Engine cradlecross member

Crossmember

Sidemember

Bumperreinforcement

Roof reinforcement

Seat crossmember

USIBOR® 1500P/DUCTIBOR® 500P

MULTIPHASE

HSS

DDQ

TRIP

DUAL PHASE

H

D

ExtragalTME

Shocktower

H

H

D

D

D

D

D

D

D D

DD

H

Rear rails

-25 -20 -15 -10 -5 0 +5 +10 +15

TWB parts

Door inner

Body side outer

Tailgate

Rail and side member

B-Pillar

Body side inner

Wheel house

Front fende inner

Bumper beam

Floor panel

Shock tower

Roof reinforcement

Cross members

Fire wall / dash panel

Net weight potential gain on the same functional perimeterCrash resistance contribution

+++

+

+

+++++++++++++++++++++++

++

Weight (%)