jfc steel japan

8/13/2019 Jfc Steel Japan

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Steel bars and wire rods from JFE


2/11

02

CONTENTS

The com bin ati on of the bla st fur nac e, hot -me talpretreatment, top and bottom blown converter, ladlerefining, and strongly-stirred vacuum degassingp roc e s s e s h a s e n a b l e d t h e p rod u c t i on o fhigh-cleanliness steel.

With advanced technologies, JFE offers steel bars andwire rods that support our society in various elds.

A Challenging Spirit , Flexibility , Sincerity

Advantages of JFEs steel bars and wire rods

High-cleanliness steel withthe blast furnace-converter method

We can manufacture round bars with a diameter of upto 420 mm750 mmof sizes are available.

We offer 95 to 180 mm diameter round bars with a5-mm pitch.

Large-diameter round bars with a 5-mm pitch

Rolled round bars withthe worlds largest diameter

Th e 4- rol l mil l de vel op ed by JFE pr ov ide s h ig hdimensional accuracy.In addition, we can manufacture mid-size steel bars andwire rods with a 0.1-mm pitch.

Automatic flaw detecti on of r ound bill et surfa ces hasenabled the manufacture of steel bars and wire rodsthat have high surface quality.In addition, the adoption of round billet peeling hasenabled the manufacture of flawless wire rods.

Steel bars and wire rods withhigh accuracy and exibility in dimension

Excellent quality

With advanced technologies, JFE offers steel bars andwire rods that support our society in various elds.

A Challenging Spirit , Flexibility , Sincerity

Pages 1 and 2

Pages 3 to 6

Pages 7 and 8

Pages 9 to 14

Pages 15 and 16

Pages 17 and 18

Advantages of JFEs steel bars and wire rods

Typical application

Production bases

Manufacturing processes and equipment

Standard dimensions and bundling

Research and development


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04

Typical application

We support next-generation automobileswith high quality steel products.

Our steel products have been used for various key

ecurity parts from the heart of an automobile, the

ngine, to transmissions, suspensions, and so on.

We offer advanced steel bars and wire rods t hat ensure

river safety and contribute to the development of

ghtweight and energy-saving vehicles.

Automobile parts

(crankshafts, connecting rods,

gears, shafts, constant-velocity

joints, hub units, ball joints, etc.)

Mechanical parts

(gears, shafts, bolts, pins, cylinder

rods, etc.)

Parts for ships and vehicles

Usage Grade

arbon steels

or machineuctural use

S10C to S58C

SCr415 to 445 (H)

SCM415 to 822 (H)

SNCM220 to 815 (H)

Alloy steelsor machine

ructural use

Typical application

SUJ2

SUJ3earing steels Bearings, pins and mechanical parts

SD785Wires for

strength hoopsHoops

NH45MV

NH48MVo alloying steels

Alternatives for thermally rened steel

products for machine structural use

SAE10B21 KF10TWire rods for

strength boltsHigh strength bolts

ire rods for

old forging

SWRCH12A to 22A

SWRCH10K to 50KBolts, nuts, rivets, and mechanical parts

no wire rodsSWRS62A to 82A

SWRS62B to 82B

Piano wires, oil-hardened and tempered wires,

springs, PC wires, and PC stranded wires

SWRH42A to 82A

SWRH42B to 82B

h carbon steelwire rods

Wire ropes, springs, washers,

stranded wires, and hose wires

Crankshaft

Engine

Crankshaft

Connecting rod

Rocker arm shaft Camshaft

Piston pin Ring gear

Steering

Steering

Rack bar

Pinion gear

Shock absorber

Shock absorber

Stabilizer

Bearing

Bearing

Joint yoke

Hub unit

Constant velocity joint

Constant velocity joint Hub unitDifferential gear

Transmission

Mission gear Differential gear

Output shaft Shift fork

CVT pulley

Ball joint

Ball joint


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Our steel bars and wire rods have been used in a wide

ange of fields including wind power generators, which

ave been receiving increased attention as a clean

nergy source, construction machines such as power

hovels and dump trucks, ship engines, and industrial

machines such as injection molding machines.

06

ypical applicationconstruction and industrial machines>

Our steel bars and wire rods have been usedn a wide range of industrial elds including

wind power generators and constructionmachines.

Bearing

Gear

Shaft

Wind power generatorWind power generator

Injection molding machineInjection molding machine Ship engineShip engine

Reduction gear

Power shovelPower shovelPin

Hydraulic cylinder rod

Turn ring

Tie rod

Piston rod

Engine bolt

Connecting rod


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Production bases

Our production bases consist of two

large-scale coastal steelworks located in

eastern and western Japan and Chita

Works , wh ich prod uces pipe s an d tu bes,

and these bases effectively produce high

qua l i ty i ron and stee l products wi th

state-of-the-art technologies.

Each Works has a Steel Research Laboratory

that supports JFE Steels technologies.

The Kurashiki Area of the West Japan

Works has the good fortune of being

located in the Setouchi Area. This area

has a mild climate and faces the Seto

Inland Sea, which is r ich in water

resources and is called a natural canal,

and it also has deep harbors. The site

area is about 11,000,000 m2, about 250

times that of the Tokyo Dome. Steel bars

and wire rods are produced mainly in the

Kurashiki Area.

JFE Groups eastern base for bars and wire rodsJFE Groups eastern base for bars and wire rods

Sendai Works,

JFE Bars & Shapes Corporation

Sendai Works,

JFE Bars & Shapes Corporation

East Japan WorksEast Japan WorksSteelworks specialized in high-grade

steel products, such as steel sheets

and plates, stainless steel, and ironpowder

Steelworks specialized in high-grade

steel products, such as steel sheets

and plates, stainless steel, and ironpowder

(Kurashiki and Fukuyama Areas)(Kurashiki and Fukuyama Areas)

Chita WorksChita WorksWorld-class steel pipe worksWorld-class steel pipe works

West Japan WorksWest Japan Works

Fukuyama Area layout Kurashiki Area layout

Electrolytic Galvanizing Mill/Continuous Galvanizing Mill

Cold Strip Mill

No. 1 Hot Strip Mill

Large Shape Mill

No. 2 Hot Strip Mill

Continuous Galvanizing Mill

Cold Strip Mill/Electrolytic Galvanizing Mill

Electrolytic Tinning Mill

Plate Mill

No. 2 Steelmaking Plant


Coke Plant

General Administration Ofce

Nos. 2 to 5 Blast Furnaces

No. 4 Sintering Plant

No. 5 Sintering Plant

Iron Ore Yard

Steel Research Laboratory

Coke Plant

Coal Yard

No. 2 Welding Pipe Mill (Spiral Pipes)

No. 1 Welding Pipe Mill (UOE Pipes)

External Coating Plant

Internal Coating Plant

Surface Finishing (Treatment) Mill/Cold Strip Mill

Hot Strip Mill


Hot-metal Pretreatment Center

Wire Rod and Bar Mill

Electrical Steel Mill

Large Shape Mill

Billet Mill


Plate Mill

General Administration Office


Lime Plant

Sintering PlantIron Ore Yard

Nos. 2 to 4 Blast Furnaces

Coke Oven

Coal Yard

JFE Steel Corporation West Japan Works is the worlds largest and mostpowerful steelworks that produces not only steel bars and wire rods, butalso steel sheets and plates, electrical steel sheets, and shape steel products.


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Steel converter (LD-KGC method)

Ladle rening equipment

Vacuum degassing equipment

Fully curved continuous casting

Bottom casting

10

anufacturing processes and equipmentOverview>

Advance process technologies enable the production of high quality products.

*Bloom dimensions: 300 mm (thickness) 400 mm (width), and 400 mm (thickness) 560 mm (width)

Iron oreIron ore

LimestoneLimestone

CoalCoal

Sintering plantIron ore and limestoneare heated and hardened

to form sintered ore.

Unloaded raw materi-als are stored.

Coke is manufac-tured from roasted

coal at high tem-

perature in cokeplant.

Oxygen and lime are blown in tohot metal to remove sulfur and

phosphorus of impurities.

Non-metall ic inclusions arefurther removed from the molten

steel to be higher quality.

Iron ore is melted andreduced to pig iron.

After th e pig iron i s poured int othe furnace, oxygen is blown in

to remove carbon and rene to

molten steel.

The molten steel is con-tinuously cast into blooms.

The blooms are

r o l l e d o u t t o

billets or roundbars.

Blast furnace Steel converter Continuous castingBloom

Billet rolling

Wiredrawing

Cold-drawnwire rods

(bearing steel)

Cold-drawnwire rods

(bearing steel)

Round barsRound bars

Square barsSquare bars

Raw material yard Coke oven Hot-metal pretreatmentThe molten steel isc a s t w i t h i n g o t

moulds.

[Secondary refining]

Ladle refining

Vacuumdegassing

EMS(Electromagnetic stirring)

Ingot casting

Billets are rolled out

to stee l ba rs and

wire rods.

Steel bar andwire rod rolling

Ingot

95 to 420mm

250 to 750mm

Round barsRound bars

Bars-in coilBars-in coil

Wire rodsWire rods

16 to 90mm

16 to 38mm12.7 to 27mm

4.2 to 19mm

ast furnace

Steel converter Ladle rening equipment Vacuum degassing equipment Continuous casting machine

Ingot casting machine Billet mill Wire rod and bar mill

Equipment used in No. 1 Steelmaking Plant

Furnace

Secondaryrefining equipment

Continuous castingmachine

Ingot castingequipment

200 t/operation

200 t/operation

200 t/operation

4 strand*

Ingot weight 12 t/24 t

3 units

1 unit

2 units

1 unit

2 units


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Making full use of state-of-the-art equipment, we manufacture high quality round and square bars.anufacturing processes and equipmentBillet Mill>

down mill Hot scarfer VH mill VH slow cooling box Magnetic leakage ux tester Automatic ultrasonic tester

Soaking pitSoaking pit Hot scarfer Hot scarfer

Rough rolling millRough rolling mill

Hot marking stamperHot marking stamperTurn tableTurn table

Slow cooling boxSlow cooling box

ShearShear

Hot sawHot saw

Cooling bedCooling bed

Bloom refinementBloom refinement

Bloom grinderBloom grinder

DemagnetizerDemagnetizer Cold sawCold saw

Automatic ultrasonic testerAutomatic ultrasonic tester

Magnetic leakage flux testerMagnetic leakage flux tester

No. 1 pressNo. 1 press

VH slow cooling boxVH slow cooling box

VH millVH mill Dimensional measuring instrumentDimensional measuring instrument

Hot sawHot sawHot marking stamperHot marking stamper

Slow cooling furnaceSlow cooling furnace

No. 2 pressNo. 2 press

Shot blastShot blast

Debaring machineDebaring machine


No. 5 grinderNo. 5 grinder

No. 1 magnetic particle testerNo. 1 magnetic particle tester No. 2 magneticparticle testerNo. 2 magneticparticle tester

Cold marking stamperCold marking stamper


Peeling machinePeeling machine

Eddy current flaw testerEddy current flaw tester

Nos. 1 to 4 grindersNos. 1 to 4 grinders

BundlingmachineBundlingmachine

LabelerLabeler

Reheating furnaceReheating furnace

HCCVHCCV

Products

95 to 420 mm

250 to 750 mm

Round bars

Square bars

Continuously cast blooms

Ingots

300x400 mm / 400x560 mm

12 t/ 24 t

Materials

Nominal capacity: 1,440,000 tons annually

Equipment used in Billet Mill

Inspectionequipment

Rolling millsBreak down mill (high-lift dual reversible system)

Finishing rolling mill (dual continuous type, V-H)

Press straightener

Magnetic leakage ux tester

Automatic ultrasonic tester

Magnetic particle tester

Billet grinder

Peeling machine

Eddy current aw tester

1 unit

4 stands

2 units

1 unit

2 units

2 units

5 units

1 unit

1 unit

HCCV Reheating furnace Soaking pit Peeling machine Eddy current aw tester Bloom grinder


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A B C D

14

KS mill (4-roll mill for steel bars)

With the worlds most advanced rolling and control technologies,we effectively manufacture various types of steel bars and wire rods.

anufacturing processes and equipmentWire Rod and Bar Mill>


Burr removerBurr remover

Billet grinder with the magnetic particle testerBillet grinder with the magnetic particle tester

Weighing machineWeighing machine

Shot blastShot blast Reheating furnaceReheating furnace KS mill (4-roll mill for steel bars)KS mill (4-roll mill for steel bars)

Water-cooling zoneWater-cooling zone




KSW mill (4-roll mill for wire rods)KSW mill (4-roll mill for wire rods)Dimensional measuring equipmentDimensional measuring equipment

Hot eddy current flaw testerHot eddy current flaw tester

Hook conveyorHook conveyor

Transfer machineTransfer machine

Bundling machineBundling machine

Pouring reelPouring reel

Weighing machineWeighing machineUnloaderUnloader

Hot eddy current flaw testerHot eddy current flaw tester Laying headLaying head

Stelmore conveyorStelmore conveyorBlock millBlock mill

Inspection tableInspection tableCold shearCold shear



LabelerLabeler

Magnetic particle testerMagnetic particle tester

Cold sawCold saw

2-roll straightener2-roll straightener

Magnetic leakage flux testerMagnetic leakage flux tester

Automatic ultrasonic testerAutomatic ultrasonic tester Grinder maintenance areaGrinder maintenance area

ChamferingmachineChamferingmachine


Shot blastShot blast

Batch-type heat treatment furnaceBatch-type heat treatment furnace

Edge heaterEdge heater

ShearShear

ShearShearHot eddy current flaw testerHot eddy current flaw tester

Dimensional measuring instrumentDimensional measuring instrument

Cooling bed shearCooling bed shear

Rough rolling millRough rolling mill

Compact millCompact millA

B

Intermediate rolling millIntermediate rolling mill

Finishing rolling millFinishing rolling mill

C

D

Block mill

Reheating furnace Pallet carrier for steel bars

KSW mill (4-roll mill for wire rods) Stelmore Pallet carrier for coils

Products

4.2 to 19.0 mm

16.0 to 38.0 mm

16.0 to 90.0 mm

12.7 to 27.0

D6 to 16

D16 to 51

Wire rods

Bars-in coils

Steel bars

Square wire rods

Deformed wire rods

Deformed steel bars

Materials

175 mm

150 mmBillets

Nominal capacity: 580,000 tons annually

Equipment used in Wire Rod and Bar Mill

Inspectionequipment

Rolling mills

Rough rolling mill (H-V system)

Intermediate rolling mill (H-V system)

Finishing rolling mill (H-V system)

KS mill (4-roll mill for steel bars)

Wire rod nishing rolling mill (block mill)

KSW mill (4-roll mill for steel bars)

Straightener

Magnetic leakage ux tester

Automatic ultrasonic tester

Magnetic particle tester

8 units

6 units

4 units

2 stands

10 stands

3 stands

2 units

2 units

2 units

1 unit

Rough rolling mill No. 2 straight bar renement line Magnetic leakage ux tester


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5.5

6

6.35

6.5

7

8

9

9.5

10

11

12

12.7

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

36

38

12.7

14

16

18

19

19.3

20

22

24

25

27

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

36

37

38

40

41

42

43

44

45

46

47

48

50

51

52

95

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

175

180

190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340

350

360

370

380

390

400

410

420

250

300

350

400

450

500

550

600

650

700

750

53

54

55

56

58

60

62

63

65

68

70

73

75

78

80

85

90

t

2,100

2,100

2,100

1,000

Number ofcoils bundled

(C) Label for square bars

16

Standard dimensions and bundling We respond exibly to customers needs in length, diameter, etc.

1. Standard dimensions (mm in dia.)

Wire rods and bars-in coils

Round bars Square bars Round bars Square bars

Mid-size wire rods and bars-in coils with a 0.1-mmpitch may also be available. Please contact us.

Round bars with a diameter of 4.2 to 5.5 mm mayalso be available. Please contact us.

Round bars with a diameter of up to 90 mm and a 1.0-mm pitch may also beavailable. Please contact us.

Please contact us about any lengths not listed above.

Steel bars

Length: 5.0 to 7.0m Length: 3.5 to 12.5m

2. Bundling

Wire rods and bars-in coilsCoil size

Coil size (mm in dia.)

4.2 to 19

16 to 38

Standard coil weight (kg) Coil diameter (mm)

Inner: 1,000 or more

Outer: 1,400

Inner: 850 or more

Outer: 1,350

Coiling direction

Clockwise

Coil bundling

Standard coil weight (kg)

(Divided coil)

Single coil

Two coils

Bundling method

Four positionswith hoop bands

Four positionswith hoop bands

*

*For divided coils, two positions with iron wiresSteel barsSize (mm in dia.)

16 to 120

125 to 420

Standard bundling weight Bundling method

Four positions with iron wires

Not bundled

3. Examples of indication and standard inspection cards

Wire rods and bars-in coils

Metal plates (1 piece per coil)

Inspection card (1 piece per coil)

Steel bars

(A) Label for round bars with a diameter of 30 to 90 mm*

(either end: 1 piece per bar)

(B) Label for round bars with a diameter of 95 mm or more

(either end: 1 piece per bar)(either end: 1 piece per bar)

*No label is provided for bars with a diameter of less than 30 mm.*For steel bars with a diameter of 16 to 90 mm, the same inspectioncard as wire rods and bars-in coils are provided (1 piece per bundle).

Products

Wire rods and bars-in coils (4.2 to 38 mm) Steel bars ( 16 to 90 mm) Steel bars ( 95 to 120 mm) Steel bars ( 125 to 420 mm) Square bars ( 250 to 750 mm) Square wire rods ( 12.7 to 27.0 mm)


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We propose total solutions rangingfrom material development to products.

JFE Steel Research Laboratory is one of the worldslargest research laboratories(in the steel industry).

JFE Steel Corporation

Steel Research LaboratoryJFE Steel Corporation


Research and development Our world-leading R&D system is pioneering new steel bar and wire rod technologies.

Bar & WireResearch Dept.

Bar & WireResearch Dept.

Automotive SheetProducts

Research Dept.

Automotive SheetProducts

Research Dept.

SteelmakingResearch Dept.

SteelmakingResearch Dept.

Rolling & ProcessingResearch Dept.

Rolling & ProcessingResearch Dept.

Iron Powder & Magnetic MaterialsResearch Dept.

Iron Powder & Magnetic MaterialsResearch Dept.

Analysis & CharacterizationResearch Dept.

Analysis & CharacterizationResearch Dept.

Other researchdepartments

Other researchdepartments

Tubular Products CastingResearch Dept.

Tubular Products CastingResearch Dept.

Dimensional precision, temperature and heat treatmentanalysis, and prediction of material properties

Control of inclusionsand segregation

Analysis of prec ipitat es,inclusions and structures

Challenging research aimedat the development of ulti-mate products including pro-cesses and analyses

Creation of new technologiesthrough the integration of dif-ferent technologies

We improved the fatigue strength ofcomponents by integrat ing surfacetechnologiessuch as carburizing,quenching and induction quenchingwithsteel composition design technologies inorder to offer products with optimallycontrolled metallic structures that meetcustomers needs.

Specialty steel is machined and thermallytreated by customers before use. Wework to develop steel products that canbe efficiently machined and thermallytreated by customers. In addition, wework to develop steel products that donot require thermal treatment for the pur-pose of saving energy. Furthermore, wepromote the elimination of the thermalrefining process from the manufacturingprocesses of steel bars in order to con-tribute to the protection of the global envi-ronment.

Fine austenite steel produced with highfrequency induction quenching technologyshows excellent delayed fracture strength (asmeasured by constant-load delayed fracturetesting equipment).

Examples of analysis of the tempera-ture distribution of the crankshaft pin.

Example of analysis of the strain distribution ofthe forged constant-velocity joint.

Development ofhigh performance steel bars

Machining processanalysis technology

In order to respond to customers needswe have many kinds of testing equipmentfor eva luat ing var ious mechan ica lproperties.

Functional/structuralevaluation technologies

Delayedfracturestrength/MPaHigh

High

Low

LowTensile strength/MPa

Maraging steelMaraging steel

High frequency heating coilsPunching

Before forging During forging After forging Equivalentstrain

CrankshaftCrankshaft

State-of-the-art

transmission

electron microscope

Ultrasonic fatigue tester

Rolling contact fatigue tester

Actual torsional fatigue tester Roller pitting fatigue tester

Test pieceTest piece

Analytical software

DEFORMTM 3D (PC)

DEFORMTM HT

Analytical software

DEFORMTM 3D (PC)

DEFORMTM HT

SCM440SCM440

Conventional steels

Fine austenite steel


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0903R(0403)1-1 UM

NoticeWhile every effort has been made to ensure the accuracy of the information contained within this publication, the use of the information is at

the readers risk and no warranty is implied or expressed by JFE Steel Corporation with respect to the use of information contained herein.

The information in this publication is subject to change or modification without notice. Please contact the JFE Steel office for the latest information.

JFE Steel Asia Pte. Ltd.16 Raffles Quay, No. 15-03, Hong Leong Building, 048581, SingaporePhone : (65)6220-1174 Fax : (65)6224-8357

SINGAPORE OFFICE

JFE Steel America, Inc., New York Office

350 Park Avenue, 27th FI., New York, NY 10022, U.S.A.Phone : (1)212-310-9320 Fax : (1)212-308-9292

JFE Steel Australia Resources Pty Ltd.Level 19, CPA Centre, 307 Queen St, Brisbane, QLD 4001, AustraliaPhone : (61)7-3229-3855 Fax : (61)7-3229-4377

JFE Steel India Private Limited1101, 11th Floor, Unitechs Signature Tower, Tower-A, South City-I, NH-8, Gurgaon, Haryana, 122002, IndiaPhone : (91)124-426-4981 Fax : (91)124-426-4982

JFE Steel Corporation, Bangkok Office22nd Floor, Abdulrahim Place 990, Rama IVRoad, Bangkok 10500, ThailandPhone : (66)2-636-1886 Fax : (66)2-636-1891

JFE Steel Corporation, Jakarta Office15th Floor Summitmas II, JL Jendral Sudirman Kav. 61-62, Jakarta 12190, IndonesiaPhone : (62)21-522-6405 Fax : (62)21-522-6408

JFE Steel Corporation, Manila Office23rd Floor 6788 Ayala Avenue, Oledan Square, Makati City, Metro Manila, PhilippinesPhone : (63)2-886-7432 Fax : (63)2-886-7315

JFE Steel Korea Corporation6th Floor. Geumgang-Tower. 889-13, Daechi-dong, Gangnam-gu, Seoul, 135-570, KoreaPhone : (82)2-3468-4130 Fax : (82)2-3468-4137

JFE Steel Corporation Beijing1720 Beijing Fortune Building No.5, Dongsanhuan North Road, Chaoyang District, Beijing, 100004, P.R.ChinaPhone : (86)10-6590-9051 Fax : (86)10-6590-9056

JFE Consulting (Shanghai) Co., Ltd.Room No.2112, Lippo Plaza, 222 Huai Hai Road(M), Shanghai 200021, P.R.ChinaPhone : (86)21-5396-5610 Fax : (86)21-5396-5611

TOKYO HEAD OFFICE

NEW YORK OFFICE

BRISBANE OFFICE

JFE Steel do Brasil LTDA, Rio de Janeiro OfficePraia de Botafogo, 228 Setor B, Salas 508 & 509, Botafogo, CEP 22359-900, Rio de Janeiro-RJ, BrazilPhone : (55)21-2553-1132 Fax : (55)21-2553-3430

RIO DE JANEIRO OFFICE

NEW DELHI OFFICE

JFE Steel Europe Limited8th Floor, International Press Centre, 76 Shoe Lane, London EC4A 3JB, U.K.Phone : (44)20-7583-1133 Fax : (44)20-7583-1144

LONDON OFFICE

BANGKOK OFFICE

JAKARTA OFFICE

MANILA OFFICE

SEOUL OFFICE

BEIJING OFFICE

SHANGHAI OFFICE

GUANGZHOU OFFICE JFE Consulting (Guangzhou) Co., Ltd.Room 3901, Citic Plaza, 233 Tian He North Road, Guangzhou 510613, P.R.China

Phone : (86)20-3891-2467 Fax : (86)20-3891-2469

Hibiya Kokusai Building, 2-3 Uchisaiwaicho 2-chome, Chiyodaku, Tokyo 100-0011, JapanPhone : (81)3-3597-3111 Fax : (81)3-3597-4860

JFE Steel America, Inc., Houston Office10777 Westheimer, Suite 1010 Houston, TX 77042, U.S.A.Phone : (1)713-532-0052 Fax : (1)713-532-0062

HOUSTON OFFICE

http://www.jfe-steel.co.jp/en/

Cat.No.H1E-001-01

jfc steel japan

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