V.Gunung Karya Steel, yang bergerak di bidang perdagangan besi / baja
didirikan pada tahun 2003 di Semarang dengan SK Menteri Kehakiman Nomor :
AHU-52748.ah.01.03. CV.Gunung Karya Steel distributor / agen menjual :
1. Pipa Besi / Pipa Baja ( Steel Pipe Carbon Steel )
- Pipa Air ( Pipa Galvanis / Pipa GIP / Steel Galvanized Pipe )
- Pipa Hitam ( Pipa Gas / Pipa SGP / Pipa Black Steel Pipe )
- Pipa Tiang Pancang ( Pipa Spiral Welded ) ASTM A252 Grade 2 ( Grade B ) , Pipa Air AWWA C200
- Pipa Seamless Schedule ( Sch) 40 , Pipa Seamless Schedule ( Sch) 80 ,
Pipa Seamless Schedule ( Sch) 160 , Pipa Seamless Galvanis , Pipa
Seamless Sumitomo , Pipa Seamless sertifikat
- Pipa Welded ( Pipa ERW )
- Pipa SNI 07- 0039-87 , Pipa API 5L Grade A , Pipa API 5L Grade B ,
Pipa A106 , Pipa ASTM A53 Grade A , Pipa ASTM A53 Grade B , Pipa
ASTM A 120 , Pipa JIS G3452-88
- Pipa Kotak Besi ( Pipa Holo ) , Pipa Kotak Galvalum , Pipa Kotak Galvanis , Pipa Kotak Galvanil
- Pipa Stallbuis / Pipa Ornamen ( Pipa Perabot )
- Pipa Steel Pipe Of Industry ( Pipa Spindo ) . Macam macam pipa Spindo
: Pipa MR , Pipa KSZ , Pipa WSZ , Pipa BSA A , Pipa BSA B , Pipa
Medium A SNI , Pipa Medium B SNI , Pipa Sch 20 , Pipa Sch 40
- Pipa Bakrie Medium , Pipa Bakrie Sch 10 , Pipa Bakrie Sch 20 ,
Pipa Bakrie Sch 30 , Pipa Bakrie ISO , Pipa Alim , Pipa Besi Import
Murah
2. Pipa Stainless
- Pipa Stainless Ornamen SS201 , Pipa Stainless Ornamen SS304
- Pipa Stainless Industri , Pipa Stainless Schedule ( Sch ) 20 , Pipa Stainless Stainless Schedule ( Sch) 40
- Pipa Stainless Seamless Sch
- Pipa Stainless Tetsura , Pipa Stainless Heize , Pipa Stainless Supra , Pipa Stainless Star
- Pipa Stainless Kilap , Pipa Stainless DOF
- Pipa Kotak Stainless ( Pipa Holo Stainless ) SS201 , Pipa Kotak
Stainless SS304 , Plat Stainless AISI 304 , Plat Stainless AISI 201
- Aksesoris Pipa Stainless : Flange Stainless , Elbow Stainless , Sok
Stainless , Tee Stainless , Reducer Stainless , Ball Valve Stainless
3. Plat Stainless Steel / Coil Stainless Steel
- Plat Stainless SS304 finish 1 , Plat Stainless SS304 finish 2 ,
Plat Stainless SS304L , Plat Stainless SS201 finish 1 , Plat Stainless
SS201 finish 2 , Plat Stainless SS316 , Plat Stainless SS316L
- Plat Stainless Hairline , Plat Stainless Mirror , Plat Stainless Kilap , Plat Stainless Dof
- Plat Strip Stainless , Siku Stainless , Plat Bordes Stainless , Plat Stainless Lubang
- Coil Stainless Ss304 , Coil Stainless SS201 , Coil Stainless SS430
- Jasa potong dan tekuk plat stainless
- Plat / Coil Stainless Stell Jindall , Plat Stainless Steel Accerinox , Plat Stainless Steel NAS
4. Besi Wiremesh
- Besi Wiremesh BRC ( Wiremesh SBRC ) , Besi Wiremesh TRC , Besi Wiremesh Lionmesh
- Besi Wiremesh sertifikat SNI , Besi Wiremesh NON SNI
- Besi Wiremesh U50 , Besi Wiremesh Non U50
- Besi Wiremesh Polos , Besi Wiremesh Ulir ( Wiremesh Berintik )
- Besi Wiremesh Lembar ( Wiremesh Sheet ) , Besi Wiremesh Roll
- Wiremesh M4 , Wiremesh M5 , Wiremesh M6 , Wiremesh M7 , Wiremesh M8 , Wiremesh M9 , Wiremesh M10 , Wiremesh M12
- Wiremesh Galvanis Hot Dip
- Wiremesh Stainless SS304 , wiremesh Stainless ss316
5. Plat Besi / Coil Besi
- Plat Hitam ( Hot Roll Steel Sheet ) , Plat Putih ( Cold Roll Steel Sheet ) , Coil Cold Roll
- Plat SPHC , Plat A36 , Plat SS41 , Plat BKI , Plat BKI KS , Plat BKI GG . Plat Sertifikat , Plat KS
- Plat 4x8 , Plat kapal / plat marine ( plat 5x20 , plat 6x20 ) , Plat Ezer
- Plat Bordes , Plat Perforated , Plat Saringan , Plat Expanded ,
Plat Strip Besi , Plat lubang , Plat Band Eyzer ( Stripping Band –
plat untuk pengikat peti )
- Jasa Potong dan tekuk plat besi
6. Plat
- Plat Aluminium , Coil Aluminium , Plat Bordes Aluminium , Plat Strip Aluminium
- Plat Galvanis ( Plat Zinc Coated ) , Plat Galvalum ( Plat Zincalume )
, Plat Galvalum warna , Plat Galvanil , Plat Alstar ( Plat Aluminum
Coated )
- Coil Galvanis ( Coil Zinc Coated ) , Coil Galvalum ( Coil Zincalume )
, Galvalum Roll , Coil Galvalum G300 , Coil Galvalum G550 , Coil
Galvalum lebar 30cm , Coil Galvalum lebar 45 cm , Coil Galvalum lebar
60cm , Coil Galvalum lebar 91.4 cm , Coil Galvalum lebar 121.9cm
- Plat Talang Galvalum , Seng Talang , Plat Lokfom ( Plat Galvanis Lokfom )
- Plat Galvanis SNI
- Menerima pemesanan plat galvanis , plat galvalum dengan panjang sesuai permintaan
Informasi berat plat galvanis , berat plat galvalum , berat plat galvanil
7. Atap dan Floordeck
- Atap Metal , Atap Metal Pasir , Atap Galvalum , Atap Galvanis , Atap galvalum warna
- Bondek / Floordeck ( Penyangga lantai cor ) , Ribdeck
- Seng Gelombang , Seng Gajah Bulan ( Seng Fumira )
- Roof Deck Spandek ( Atap galvalum 9 gelombang ) , Roof Deck Trimdeck
( Atap galvalum 5 gelombang ) , Dinding Galvalum 12 gelombang
- Atap Galvalum lebar 68 cm , atap galvalum lebar 75 cm , atap
galvalum lebar 76 cm , atap galvalum lebar 80 cm , atap galvalum lebar
92.5 meter , atap galvalum lebar 1 meter , dinding galvalum lebar
92.5 cm
- Nok Bumbungan Atap ( Ridge caping ) , CNP Galvalum , Reng Galvalum , Trust Galvalum
- plat galvalum , plat galvanis , plat galvanil , plat lokfom
- genteng metal , genteng metal pasir
8. Kawat
- Kawat SNI , Kawat Galvanis Hot Dip , kawat paku , kawat lapis seng
- Kawat Bronjong Pabrikasi / Gabion Pabrikasi ( Kawat Bronjong Mesin )
, Kawat Bronjong manual , Bronjong Pabrikasi Lapis PVC
- Bronjong kawat SNI 03-0090-1999 ( Gabion SNI 03-0090-1999 ) ,
Bronjong PVC SNI 03-3046-1992 ( Gabion PVC SNI 03-3046-1992 ) ,
Geotextile 150gr , Geotextile 200gr , Geotextile 250gr , Geotextile
300gr
- Kawat duri galvanis hot dip , kawat duri untuk huru hara , kawat
silet , kawat harmonika galvanis , kawat loket galvanis , kawat silet
concertina , kawat bendrat , kawat loket lapis pvc
- Kawat BWG 8 , kawat BWG 10 , kawat BWG 12 kawat BWG 14 , kawat BWG 16
Harga kawat bronjong / gabion murah mulai dari Rp 85.000
9. Pipa PVC / Pipa paralon ( Pipa UPVC )
- Pipa PVC Wavin AW , Pipa PVC Wavin D , Pipa PVC Wavin Black , Pipa
PVC Wavin Standar , Pipa PVC Wavin Lite , Pipa PVC Wavin Tigris ,
Pipa PVC Wavinlok , Pipa PVC Wavinsafe , Pipa PVC Rucika , Pipa PVC
Wavin SNI
INFORMASI HARGA PIPA PVC WAVIN AW , HARGA PIPA PVC WAVIN D , HARGA
PIPA PVC RUCIKA AW , HARGA AKSESORIS PIPA PVC RUCIKA DAPAT DILIHAT DI
WWW.ABADIMETALUTAMA.COM
- Pipa PVC Vinilon AW , Pipa PVC Vinilon D , Pipa PVC Vinilon VP , Pipa PVC Vinilon VU , Pipa PVC Vinilon SNI
- Pipa PVC Supralon AW , Pipa PVC Supralon D , Pipa PVC Maspion AW ,
Pipa PVC Maspion D , Pipa PVC Unilon Aw , Pipa PVC Unilon D , Pipa
PVC Supralon SNI , Pipa PVC Trilliun SNI , Pipa PVC Maspion SNI
- Pipa PVC SNI 06-0084-2002 , Pipa PVC SNI 06-4829-2005 , Pipa ISO
4422/ 4065 , Pipa ISO 4437/ 2007 , Pipa PVC JIS K6741-2 ,
- Pipa pvc s8 , pipa pvc s5 , pipa pvc s10 , pipa pvc s12.5 , pipa pvc s16
- Aksesoris pipa pvc , aksesoris pipa rucika , aksesoris pipa vinilon
, aksesoris pipa PVC SNI 06-0135-1987 , aksesoris pipa PVC JIS K6741/
K6742-1979
10. Pipa PE / Pipa HDPE
- Pipa PE Supralon ( Pipa HDPE Supralon ) , Pipa PE Wavin ( Pipa HDPE
Wavin ) , Pipa PE Innova , Pipa PP-R Westpex Pipa PE Maspion ( Pipe
HDPE Maspion ) , Pipa HDPE Trilliun
- Pipa HDPE PN8 , pipa HDPE PN10 , pipa HDPE PN 12.5 , pipa HDPE PN
16 , pipa HDPE PN20 , pipa pvc SDR11 , pipa pvc SDR17, pipa PE 100 ,
pipa PE 80
- Pipa air panas , pipa untuk fiber optik , pipa food grade , pipa untuk gas cair , pipa untuk kabel
- Aksesoris pipa PE , Aksesoris pipa HDPE , Aksesoris Pipa PP-R
- Pipa Conduit Westpex
11. Macam macam besi
- Besi As , Besi As St41 , Besi As ST42 , Besi As ST 60 , Besi As
St90 , Besi As Kotak , Besi Virkan Polos ( besi nako ) , Besi Virkan
Ulir , As Stainless Stainless
- Besi beton polos ( besi round bar) , besi beton ulir ( besi deformed
bar ) , besi beton SNI , besi beton U30 , besi beton U24 , besi
beton KS polos , besi beton KS ulir , besi beton BJKU , besi beton
U24 , besi beton U30 , besi beton U40 , besi virkan , besi as kotak ,
besi beton sertifikat , besi beton standar SNI 07-2052-2002
- Besi Wf / Besi IWF ( Besi Wide Flange ) , Besi H ( Besi Hbeam ) ,
besi INP , besi WF GG ( besi WF Gunung Garuda ) , besi WF Import ,
besi Hbeam GG ( Besi Hbeam Gunung Garuda ) , besi WF sertifikat , besi
Hbeam sertifikat
- Besi Kanal U ( Besi UNP ) , Besi UNP Galvanis , Besi Kanal C ( Besi CNP ) , besi UNP standar JIS , besi CNP standar JIS
- Besi siku , besi siku SNI , besi siku KS , besi siku non standar , besi siku lubang , besi siku galvanis hot dip
12. Aksesoris Pipa Besi dan aksesoris pipa stainless
- Aksesoris merk Gbrand ( Aksesoris pipa Galunggung ) , aksesoris merk
Kitz , aksesoris merk TSP , aksesoris merk Yone , aksesoris merk
Gala , aksesoris merk Tozen , aksesoris merk Fivalco , aksesoris merk
357 , aksesoris merk TL
- Aksesoris pipa SNI 07-9139-1987 , aksesoris pipa standar JIS B2301-1982
- sambungan pipa , fitting pipa
- Elbow Galvanis , elbow SGP , elbow sch40 , elbow sch80 , elbow 45
derajat , elbow 90 derajat long , elbow 90 derajat short , elbow
long , elbow short , elbow SNI , elbow JIS , elbow carbon steel ,
elbow stainless steel , elbow seamless , elbow ss304 seamless , elbow
ss304 welded , elbow reducer , street elbow 45 , elbow male and
female , unions elbows flat seat , male and female unions elbows flat
seat , unions elbows taper seat ( Conical ) , male and female union
elbows taper seat ( Conical ) , short bends , male and female short
bends , long sweep bends , male and female long sweep bends , male
long sweep bends , 45 long sweep bends , 45 male and female long sweep
bends
- Knee Galvanis , knee SGP , knee sch 40 , knee sch 80 , knee 45
derajat , knee 90 derajat long , knee 90 derajat short , knee 180
derajat , knee long , knee short , knee SNI , knee JIS , knee
carbon steel , knee stainless steel
- Flange ( fleng ) JIS 5K , flange JIS 10K , flange 20K , flange
ANSI 150 , flange ANSI 300 , flange ANSI 600 , flange ANSI 900,
flange PN 10 , flange PN16 , flange PN25 , flange PN40 , flange
carbon steel ( flange besi ) , flange stainless steel , flange slip on
, flange weld neck , flange blind ( flange buta )
- Reducer Eccentric , Reducer Concentric , Reducing Elbow , Reducing
Sockets , Reducing Hexagon Nipples , Reducing Tees , Reducing
Sockets Plain with Ribs , Reducing Socket Banded with Ribs , Reducer
Stainless
- Tee Galvanis , Tee SGP , Tee Sch , Tee Stainless , Tee SNI , Tee
Y ( Straight ) , Reducing Tee , Socket SNI ( Sok ) Galvanis , Socket
( SoK ) SGP , Male and Female Socket , Reducing Socket , Socket
plain with ribs , socket banded with ribs , plugs , fitting
- V Knee , V ring , V Sock , V tee , V Nipple , Cap Plain ,
Watermur , Dop , Ubolt , Ring ( Locknuts ) , Hexagon Bushes (
Bushings) , Plugs , Hexagon Nipple , Crosses Plain Equal , Union
Flat Seat , Male And Female Unions Flat Seat , Unions Taper Seat (
Conical ) , Male and Female Union Taper Seat ( Conical ) , Reducing
Hexagon Nipples , Backnuts , Mur , Baut
- Valve , Ball Valve KITZ ( Ball Valve Kitazawa ) , Ball Valve
Stainless Steel , Ball Valve Screwed End , Ball Valve Carbon Steel ,
Swing Check Valve , Y Strainer Screwed End , Wafer Disc Check Valve ,
Ball Valve Flanged End , Ball Check Valve ( PVC ) , Ball Foot Valve (
PVC ) , True Union Ball Valve ( PVC ) , Compact Ball Valve ( PVC ) ,
Ball Valve Hexagon type Gate Valve KITZ , Gate Valve Stainless Steel ,
Gate Valve Ansi 150
- Steam Trap screwed end , Cast Iron Steam Trap Class 16 Screwed End ,
Cast Iron Steam Trap Flanged End , Inverted Bucket Steam Trap ,
Inverted Bucket Steam Trap , Flexible Rubber Joint , Flexible Hose
- Gate Valve KITZ , Gate Valve Stainless Steel , Gate Valve Ansi 150 , Gate Valve Gala
- Sight Glass , Reducing Valve , Lap Joint Stub End , Pressure
Gauges , Thermometer , Solenoid Valve , Watermur , Dop , Dop
Galvanis , Bolt , Nut ( Mur , Baut )
13. Aksesoris Pipa merk GALA
- Wafer Butterfly Valves Class 125 , Wafer Butterfly Valves Class 250 ,
Wafer Butterfly Valves PN16 , Wafer Butterfly Valves PN25 , Wafer
Butterfly Valves JIS 10K , Wafer Butterfly Valves JIS 16K
- Lug Butterfly Valves Class 125 , Lug Butterfly Valves Class 250 ,
Lug Butterfly Valves PN16 , Lug Butterfly PN25 , Lug Butterfly Valves
JIS 10K , Lug Butterfly Valves JIS 16K
- U Type Butterfly Valves Class 125 , U Type Butterfly Valves PN16 , U Type Butterfly Valves JIS10K
- Double Flanged Butterfly Valves AWWA C504 Class 300 , Double Flanged
Butterfly Valves Class 125 , Double Flanged Butterfly Valves PN16 ,
Double Flanged Butterfly Valves JIS 10K
- Double Eccentric Butterfly Valves PN10 , Double Eccentric Butterfly Valves PN16 , Double Eccentric Butterfly PN25
- Grooved Butterfly Valve
- Triple Eccentric Butterfly Valves PN10 , Triple Eccentric Butterfly
Valves PN16 , Triple Eccentric Butterfly Valves PN25 , Triple
Eccentric Butterfly Valves PN40 , Triple Eccentric Butterfly Valves
PN64
- Malleable Iron Lever Operator , Steel Lever Operator , Aluminium Lever Operator
- Gear Box I Stage Transmission , Gear Box 2 Stage / 3 Stage Transmission , Signal Gearbox
- Triple Duty Valve Class 125 , Triple Duty Valve Class 250 , Triple
Duty Valve PN16 , Triple Duty Valve PN25 , Triple Duty Valve JIS10K ,
Triple Duty Valve JIS16K
- Fixed Orifice Double Regulating Valve PN25 , Fixed Orifice Doube Regulating Valve PN16
- Variable Orifice Double Regulating Valve PN16 , Variable Orifice Double Regulating Valve PN25
- OS& Y Metal Seated Gate Valve Class 125 , OS& Y Metal Seated
Gate Valve Class250 , OS& Y Metal Seated Gate Valve PN16 ,
OS& Y Metal Seated Gate Valve PN25 , OS& Y Metal Seated Gate
Valve JIS10K , OS& Y Metal Seated Gate Valve JIS16K
- NRS Metal Seated Gate Valve Class 125 , NRS Metal Seated Gate Valve
PN10 , NRS Metal Seated Gate Valve PN16 , NRS Metal Seated Gate Valve
JIS10K , Gate Valve 300 PSI
- Ball Valve Class 125 , Ball Valve PN16 , Ball Valve JIS10K
- Check Valve Wafer Type Double Door Class 125 , Check Valve Wafer
Type Double Door Class 250 , Check Valve Wafer Type Double Door PN16 ,
Check Valve Wafer Type Double Door PN25 , Check Valve Double Door
JIS10K , Check Valve Double Door JIS16K , Check Valve Wafer Type
Silent Class 125 , Check Valve Wafer Type Silent Class 250 , Check
Valve Wafer Type Silent PN16 , Check Valve Wafer Type Silent PN25 ,
Check Valve Wafer Type Silent JIS10K , Check Valve Wafer Type Silent
JIS16K , Check Valve Globe Type Silent Class 125 , Check Valve Globe
Type Silent Class 250 , Check Valve Global Type Silent PN16 , Check
Valve Global Type Silent PN25 , Check Valve Global Type Silent JIS 10K ,
Check Valve Global Type Silent JIS16K , Check Valve Flange Type Swing
Class 125 , Check Valve Flange Type Swing PN16 , Check Valve Flange
Type Swing JIS10K , Check Valve Flange Type Lifting Class 125 , Check
Valve Flange Type Lifting PN16 , Check Valve Flange Type Lifting JIS10K
, Check Valve Swing Resillent Seated 300PSI Flanged Ends
- Foot Valve Class 125 , Foot Valve Class 250 , Foot Valve PN16 ,
Foot Valve PN25 , Foot Valve JIS 10K , Foot Valve JIS 16K
- Globe Valve OS& Y Class 125 , Globe Valve OS& Y PN16 , Globe Valve OS& Y JIS 10K
- Y Strainer Class 125 , Y Strainer Class 250 , Y Strainer PN16 , Y
Strainer PN25 , Y Strainer JIS 10K , Y Strainer JIS 16K , Y Strainer
Flanged End 300 PSI
- Basket Strainer CBS Class 125 , Basket Strainer CBS Class 250 ,
Basket Strainer CBS PN16 , Basket Strainer CBS PN25 , Basket Strainer
CBS JIS10K , Basket Strainer JIS 16K
- Air Vent Screwed Class 125 , Air Vent Screwed PN16 , Air Vent Screwed JIS10K
- Air Valve Flanged Orifice Class 125 , Air Valve Flanged Orifice PN16
, Air Valve Flanged Orifice JIS 10K , Air Valve Flanged Double
Orifice Class 125 , Air Valve Flanged Double Orifice PN16 , Air Valve
Flanged Double Orifice JIS10K
- Flexible Rubber Joint Twin Sphere with Floating Flanged , Flexible
Rubber Joint Type Screwed , Flexible Hose Type Union , Flexible Hose
Stainless Steel Type Flange
14. Aksesoris Pipa PVC dan HDPE
- Aksesoris pipa Rucika , Aksesoris pipa Wavin Standar , Aksesoris
pipa Wavin Black , Aksesoris Wavin Tigris , Aksesoris pipa Vinilon
- Aksesoris pipa PVC AW , Aksesoris pipa HDPE , Aksesoris pipa PVC
standar SNI 06-0135-1987 , Aksesoris pipa PE standar SNI 06-4829-2005 ,
Aksesoris pipa PE standar ISO 4427-2: 2007 , Aksesoris Pipa PE
standar ISO 4422/ 4065 , Aksesoris pipa PE standar SNI 06-0084-2002 ,
Aksesoris pipa PVC Standar JIS K6741-2 , Aksesoris pipa PVC standar
JIS K6743
- Fitting PVC , Tee PVC , Elbow PVC , Valve Socket PVC , Soket PVC ,
Union Socket PVC , Faucet Socket PVC , Faucet Elbow PVC , Faucet
Tee PVC , Union Thread PVC , Cap PVC , Flange PVC , Reducing Socket (
Reducing Soket ) PVC , Plug PVC , Clean Out Cap PVC , Increaser ( D
In ) PVC , P Trap PVC , Large Radius Double Tee , Y Branch , Large
Radius Tee , Large Radius Elbow , Elbow 45 derajat , Lem Pipa PVC ,
Lem Tropical , Lem Wavin , Lem Rucika , Lem Vinilon , Lem True Glue
- Reducer Tee Rubber Ring , Tee All Rubber Ring , Reducer All Rubber
Ring , Socket All Rubber Ring , Reducer Tee Solvent Cement , Stub
Flange , Socket All Solvent Cement , Reducer All Solvent Cement , End
Cap Solvent Cement , Flange Socket Solvent Cement , Flange Socket
Rubber Ring , Tee All Flange , Flange Adaptor , PVC Flange , Flange
Spigot , End Cap Rubber Ring , Bend All Rubber Ring , Bend Rubber
Ring Spigot , Bend All Solvent Cement , Bend All Flange
- Coupler , Reducer Female , Reducer Male / Female , Elbow Female
Threaded 90 , Elbow Male Threaded 90 , Metal Reducer With Cap Nut ,
Equal Tee , Reducer Tee , Electrofusion Coupler , Male Thread Joint ,
Female Thread Joint , Female Thread Tee , Male Thread Tee , Plastic
Weld In Saddle , Male Thread Weld in Saddle , Female Thread Weld In
Saddle , Straight Way Valve
-
15. Polycarbonate / Kanopi
- Polycarbonate Twinlite ( Kanopi Twinlite ) , Polycarbonate Lexan (
Kanopi Lexan ) , Polycarbonate Global ( Kanopi Global ) ,
Polycarbonate Sunlite ( Kanopi Sunlite ) , Polycarbonate Platinum (
Kanopi Platinium ) , Polycarbaone Solarflat ( Kanopi Solarflat
- Polycarbonate tebal 4.2 mm sampai 10 mm
HUBUNGI KAMI,
CV.GUNUNG KARYA STEEL
Jalan.Brotojoyo Barat No.36E
Semarang 50178, Jawa Tengah Indonesia
Telp. + 62-24-3566608 ; 0822 9929 4733
Faks. + 62-24-3566608
Email : gunungkaryasteel@ gmail.com