SA572Grade 55 India machining

sa572grade 65 chad machining-Wholesale Steel Supply

A36 vs A572 machinability - Machines Machining .Apr 05,2007 Initially the machine shop recommended 1045 plate,but the costing is higher the A572.RE:A36 vs A572 machinability EdDanzer (Mechanical) 23 Mar 07 22:42.A572 has a higher yield strength than A36,will cost a little more per pound and will machine better.hardox 500-PIZZ STEEL GRADE - Shipbuilding Steel Plate Hardox 500 Hardox 550 Hardox 600 Hardox Extreme Strenx performance steel and Hardox wear plate are steel grades that can be machined with high speed steel (HSS) or cemented carbide (CC) tools.This brochure includes our suggestions for cutting data (feeds and speeds) and the selection of.Machining recommendations for Strenx and HardoxHardox 500 american standard a572 grade 55 universal beam - JIS steel american standard a572 grade 55 universal beam.We specializes in american standard a572 grade 55 universal beam.structural american standard a572 gr 55 i beamstructural american standard a572 gr 55 i beam ASTM A572 / A572M 18 Standard Specification for High Abstract.This specifiation covers the standard requirements for Grades 42 [290],50 [345],55

Wintel Marketing - Wholesale Trader of Photocopier Machine

Photocopier Machine,EPSON Projectors Sony Projectors Wholesale Trader offered by Wintel Marketing Services from Chennai,Tamil Nadu,India.Wintel Marketing Services.c.i.t nagar,Chennai,Tamil Nadu.GST No.33ACKPV5031A1ZY.TrustSEAL Verified.Call 08049593971 59% Response Rate.Washing Machine Price Buy Washing Machine Online in IndiaBest Washing Machine - LG's has best range of washing machines in India.Buy semi,fully automatic,top load and front load washing machines online.Check Price and Reviews.To properly experience our LG website,you will need to use an alternate browser or upgrade to a newer version of internet Explorer (IE10 or greater).User rating 100/100Brand BrandMachine Shops in India - MFGRR Engineering and Exports an ISO 9001 Certified CNC Machining facility based in India provides precision machined components with highest quality standards.Operating Swiss,CNC,NC lathes and milling machines.Our two export oriented plants in Bangalore and Kolar,India can produce output in batch

TOUGHBOOK 55 Panasonic North America - United States

The Panasonic TOUGHBOOK SA572Grade 55 India machining55 is a 14 semi-rugged laptop that features an innovative modular design and up to 40 hours of battery life with its optional 2nd battery.The modular design allows users to upgrade the memory,storage,keyboard and three different expansion areas featuring additional I/O,optical drives,authentication readers,dedicated graphics and more.Stress Relief - American Welding SocietyFeb 13,2018 SA572Grade 55 India machining#0183;This is a shame because A572 Grade 50 is a prequalified base metal that is right on the cusp of allowing PWHT (with Engineering approval) and you may have been able to anticipate this problem with a WPS prequalified with or without PWHT. By 46.00 Date 02-13-2016 16:55 4u..I never said you didn't have any common sense.In fact the only Steel plates A572 Grade 50,A572 Grade 55,A572 Grade 60 A572 Grade 50,A572 Grade 55,A572 Grade 60,A572 Grade 65,A572 Grade70,A572 Grade 42,steel supplier.BBNSTEEL is the large agent of HBIS wuyang mill.BBNSTEEL has a 11 years experience in supply high quality,super thick steel plate.Max thickness is 400mm.1.Steel Grade:A572 Gr 50,A572 Gr 55,A572 Gr 60,A572 Gr 65,A572 Gr 42

Speedy Metals Information for ASTM A572 Grade 50 Plate

ASTM A572 Grade 50 is considered a workhorse grade and is widely used in many applications.Steel mills produce channel and heavy beams with Grade 50.It is commonly used in structural applications,heavy construction equipment,building structures,heavy duty anchoring systems,truck frames,poles,liners,conveyors,boom sections Smart TVs NokiaIndia.Switzerland.Screen size.60 - 75 50 - 59 43 - 49 32 - 42 Done Smart TVs.Nokia Smart TV 75 inch 4K UHD. Nokia Smart TV 55 inch UHD with Sound by Onkyo.Samsung TV Price in India 2021 Samsung TV Price List Samsung TV price in India.Compare the price,specifications,reviews of Samsung 24 inch,32 inch,44 inch,LED,Full HD,LCD TV and buy online or nearby stores.

Rice Harvester at Best Price in India

Gomselmash India Private Limited.New Delhi 403A,Copia Corporate Suites,Plot No.9 Jasola,New Delhi - 110025,Delhi.TrustSEAL Verified.Company VideoReviews 3KRelated searches for a572 grade 55 india machininga572 grade 50 machinabilitya572 grade 50 steela572 grade 50 steel suppliersa572 grade 50 welding procedurea572 grade 50 platea572 grade 50 bar stockastm a572 grade 50 hardnessastm a572 grade 50 datasheetSome results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextRelated searches for a572 grade 55 india machininga572 grade 50 machinabilitya572 grade 50 steela572 grade 50 steel suppliersa572 grade 50 welding procedurea572 grade 50 platea572 grade 50 bar stockastm a572 grade 50 hardnessastm a572 grade 50 datasheetIncluding results for a572 grade 55 india machining.Do you want results only for SA572Grade 55 India machining?Some results are removed in response to a notice of local law requirement.For more information,please see here.12345Nextamerican standard a572 grade 55 universal beam - JIS steel american standard a572 grade 55 universal beam.We specializes in american standard a572 grade 55 universal beam.structural american standard a572 gr 55 i beamstructural american standard a572 gr 55 i beam ASTM A572 / A572M 18 Standard Specification for High Abstract.This specifiation covers the standard requirements for Grades 42 [290],50 [345],55

QLED TV - Quantum Dot TV - Samsung India

Samsung QLED TVs are latest Quantum Dot TV with best picture display quality with elegant design.Select Buy from complete range at Samsung online official website.QLED TV - Quantum Dot TV - Samsung IndiaSamsung QLED TVs are latest Quantum Dot TV with best picture display quality with elegant design.Select Buy from complete range at Samsung online official website.Price 86990Condition NewHyperbaric Machine Model 55,Food Equipments,Food Mil Trading Private Limited - Offering Hyperbaric Machine Model 55,Food Equipments,Food Processing Machinery, , ,Hiperbaric High Pressure Processing Machine in Ambattur,Chennai,Tamil Nadu.Read about company.Get contact details and addressID 13763803230

People also askWhat is A572 grade 50 steel?What is A572 grade 50 steel?SA572 Grade 50 Plate used for applications such as welded bridge construction,notch toughness requirements are to be negotiated between the purchaser and the producer.ASTM A572 Gr.50 Structural Steel Plate steel shall be killed and undergo normalization tempering.What is A572 Grade 50 Plate ?A572 Grade 50 Plate,ASTM A572 Grade 50 Plate,ASTM Optimization of Machining Parameters for Turning on

Optimization of Machining Parameters for Turning on CNC Machine of Inconel-718 alloy.Pooja Petkar 1.1M.Tech ,Department of Mechanical-Production,KITCOEK,Kolhapur,Maharashtra,India.S.S Karidkar 2.2Assistant Professor,Department of Mechanical Engineering,KITCOEK,Kolhapur,Maharashtra,IndiaNew Samsung Smart TV - Specs Features Samsung IndiaUNBOX 7 MAGICAL BENEFITS!! Samsung offers latest Smart TV with features like Personal Computer,Music System,Home Cloud,Live Cast,Two-Way Sharing much more.

My India Machine - Home Facebook

My India Machine.1,060 likes 4 talking about this.Only Indian paper cup machine manufacturing company with ISO 9001:2015 certification and selling low cost paper cup machine with great qualityMachining Tool Collectibles for sale Get the best deals on Machining Tool Collectibles when you shop the largest online selection at .Free shipping on many items Browse your favorite brands $55.00.$13.75 shipping.10 bids Ending Saturday at 2:01PM PST 2d 2h Machinist Tool Lot Starrett,HSS Mo-Max,Jacobs 1-A Chuck,Morse,Radius Gages.$52.00.Machining Materials Guide - Best Steel for Machining Cox Click to read Machining Materials Guide on metal,steel and plastic materials for CNC turning,CNC machining and automatic screw machine manufacturing!

Machine Shops in Gujarat,India - MFG

Forging,Machining,Centrifugal Casting,Ceramic Mold Casting,Die Casting Gujarat precision is manufacturing precision machine components,Sub-assemblies Assemblies for machine tools,Textiles other Engineering industries.Incorporated in year 1980 with the aim of long and Mutually beneficial association with ouMIG welding Machine - Buy MIG Welder Three PhaseAvail Jaw Dropping Deals Best Rates on MIG Welding Machine.Having a pan India presence including cities like Delhi NCR,Mumbai,Chennai,Bengaluru,Kolkata,Chennai,Pune,Jaipur,Hyderabad and Ahmedabad,you will get all your choicest brands under one roof from trusted MIG Welding Machine distributers.Load Calculator - Power Consumption CalculatorOur easy to use Power Consumption Calculator will help you to know the exact total load requirements for your property! This three step power consumption calculator is all you need.

LG Washing Machine Price List in India (27th February 2021

Feb 27,2021 SA572Grade 55 India machining#0183;List of LG Washing Machine in India with their lowest online prices.Find the best washing machines from this list through our advanced filters and check detailed specifications.Prices of LG Washing Machine was last updated on 27th February 2021.LG 49SM8100PTA Nano Cell TV,4K Active HDR LG IndiaTake your television viewing experience to a whole new level with the LG 49SM8100PTA Nano Cell TV.It comes with the 4K Active HDR feature delivering delicate detail and rich color.You can now enjoy any video content in amazing HDR quality.Key features include Nano Color,Nano Accuracy,ThinQ SA572Grade 55 India machiningAI with Google Assistant,4K Active HDR,DTS Virtual:X and many more.Karm Machine Tools Pvt.Ltd.- Home FacebookKarm Machine Tools Pvt.Ltd.,Ajmer district.1,253 likes 37 talking about this 11 were here.Karm Machine Tools (P) Ltd.is Indias premier company

GF Machining Solutions Milling - EDM - Advanced

Our extensive portfolio ranges from Electrical Discharge Machining (EDM) solutions,three- and five-axis Milling machines and Spindles,3D Laser texturing machines,Additive Manufacturing and machines for Laser micromachining to solutions for Tooling,Automation,Software and Digitalizationall backed by unrivaled Customer Services and support.EMAG Machine Tools Turning Lathes and Grinding MachinesCNC machine tools,turn-mill centers,CNC lathes and CNC grinders for an enormous range of applications Focus on innovative CNC machine tools.As a manufacturer of CNC machine tools the EMAG Group masters all the processes involved in the soft and hard machining of metals.EMAG draws on an enormous range of technologies to achieve this from Doosan Machine ToolsWelcome to official website of Doosan Machine Tools! Here you can view our wide range of products from the very latest machines to our most popular models.You can also obtain detailed information about exhibitions and events,etc.

Dishwasher Price in India {27 Feb 2021} Get Dishwasher

Dishwasher Price List in India. Every modern kitchen now comes equipped with a dishwasher machine to aid the family in their daily cleaning ritual.A mechanical device which cleans the contents by spraying hot water between 55 and 75 SA572Grade 55 India machining#176;C at the dishes,and lower temperatures for more delicate vessels.A mix of detergent and water is Commercial Atta Chakki Machine - Commercial Flour Mill Find here Commercial Atta Chakki Machine,Commercial Flour Mill manufacturers,suppliers exporters in India.Get contact details address of companies manufacturing and supplying Commercial Atta Chakki Machine,Commercial Flour Mill,Atta Chakki Machine for Business across India.CNC Milling Machines for sale In Stock Get the best deals on CNC Milling Machines when you shop the largest online selection at .Free shipping on many items Browse your favorite brands affordable prices.

CNC EDM Machines - CNC EDM Machineries Latest Price

Find here CNC EDM Machines,CNC EDM Machineries manufacturers,suppliers exporters in India.Get contact details address of companies manufacturing and supplying CNC EDM Machines,CNC EDM Machineries,CNC Electric Discharge Machining Machineries across India.Best 4K TV In India 2021 4K UHD OLED TV Buying GuideJan 25,2021 SA572Grade 55 India machining#0183; It takes your entertainment experience to the next level.This 4K Tv works perfectly with Alexa and googles home.Samsung is a well-known brand for washing machines,air conditioners,refrigerators,mobiles,and TV.They have excellent after-sale support and service in India. You can turn this smart TV into a full-fledged computer.Available Grades of Steel - Midwest MaterialsA572 Grade 50 A572 Grade 55 A572 Grade 60 A572 Grade 65 A606 A656 Grade 50 A656 Grade 60 A656 Grade 70 A656 Grade 80 A786 Diamond Plate J1392 050XLF J1392 050XLK J1392 080XLF J1392 100XF.Coated Products and Grades.Galvanized Galvannealed Galfan (TM) A653 CS Type A A653 CS Type B A653 DDS A653 EDDS A653 FS Type A.A653 FS Type B

Amstrad India - Air Conditioner,LED TV,Washing Machine

24 SA572Grade 55 India machining#215;7 365 Days IVR 020 7197 0079 Hindi English Gujarati Malayalam Punjabi Tamil Kannada Telugu BanglaAlloy steel ASTM-A572 Grade 50 Products Chemical Alloy Steel ASTM-A572 Grade 50 Chemical Mechanical Properties Includes Chemical Mechanical Data,Specifications,Tradenames,Welding Machining Properties Including Alloy Steel ASTM-A572 Grade 50 available in Types of Strips,Coils,Sheets,Plates,Pipes Tubes,Round Hexagon bars,Forgings,Flanges,Forged Other Fittings,Fasteners,Wires.All LED TV Price List in India (26th February 2021 Televisions are a vital source of entertainment across homes in India.Over the course of time TVs have evolved from large boxes to ultra slim pieces of home equipment.In terms of size,they now come in packages as small as 24-inch TVs all the way up to 55-inches ; some even bigger.

Alkaline Water Ionizer Machine India HWP-55 HWP-77

HWP-55.The Alkaline Water Ionizer- HWP 55 is one-step-ahead in home-based water purifying solutions,which now serves as the necessary base for an overall healthy lifestyle.This appliance electrolyzes purified water and removes impurities from it toASTM A572 Grade 50,55,60,65 Steel Plates supplier Indiaastm a572 grade 50 is useful in making buildings,construction,bridges,equipment machinery,truck parts,transmission towers,towers,and freight cars.It is a higher yield and tensile strength compared to ASTM A36.hshr plate astm a572 grade 50 is a high strength,low alloy steel plate that offers an optimum combination of strength,weldability and notch toughness with economy.ASTM A572 Grade 50 vs.Hot Rolled SAE-AISI 1018 May 30,2020 SA572Grade 55 India machining#0183; SA572Grade 55 India machininggt; ASTM A572 Grade 50 Up One.ASTM A572 Grade 50 vs.Hot Rolled SAE-AISI 1018.Both ASTM A572 grade 50 and hot rolled SAE-AISI 1018 are iron alloys.Their average alloy composition is basically identical.There are 31 material properties with values for both materials.Properties with values for just one material (1,in this case) are not shown.

ASTM A572 Grade 50 Pipe,Carbon Steel ASME SA572 Gr 50

Grades 42 [290],50 [345],and 55 [380] are A572 Grade 50 Steel Pipe intended for bolted,riveted or welded structures.Grades 60 [415] 65 [450] are intended for bolted or riveted construction of bridges,or for riveted,welded bolted construction.ASTM A572 - SSABASTM A572 includes five grades with specified minimum yield strengths of 42,50,55,60,and 65 ksi,respectively.For applications where notch toughness is important,consult SSAB for specific Charpy V-notch toughness requirements.ASTM A572 grades are used in a wide variety of structural applications in many market segments.ASTM A36 Carbon Steel vs.ASTM A572 Grade 50 :May 30,2020 SA572Grade 55 India machining#0183;Both ASTM A36 carbon steel and ASTM A572 grade 50 are iron alloys.Both are furnished in the as-fabricated (no temper or treatment) condition.They have a very high 99% of their average alloy composition in common.For each property being compared,the top bar is ASTM A36 carbon steel and the bottom bar is ASTM A572 grade 50.

AS3600 concrete elastic modulusJun 17,2012Fillet Weld Macro Etch Test InterpretationAug 02,2011A992 Cost vs.A36Nov 04,2009A36 (Grade 50) versus A572 Gr 50 See more resultsMachining surface finish chart,conversion,comparator

Machining surface finish chart,comparator,method,degree,Ra,Rz,RMS As for machining to iron and steel castings,the surface finish smooth degree is also an important requirement.The following is the conversion chart is from dandong foundry,for Ra (um),Ra (micro inch),Rz (um),RMS and finish degree in China and USA,including the A572 grade 50 round bar,A572 grade 50 steel Chemical A572 grade 50 round bar,A572 grade 50 steel Chemical Composition.A572 steel is a high strength,low alloy columbium vanadium structural steel.A572 grade 50 round bar with specification providing for a 50,000 KSI minimum yieldA572 grade 50 round bar,A572 grade 50 steel Chemical A572 grade 50 round bar,A572 grade 50 steel Chemical Composition.A572 steel is a high strength,low alloy columbium vanadium structural steel.A572 grade 50 round bar with specification providing for a 50,000 KSI minimum yield

A572 Grade 50 Plate,ASTM A572 Grade 50 Plate,ASTM

A572 Grade 50 Plate ASTM A572 Grade 50 Plate,A572 Grade 50 Steel Plate Manufacturer in Mumbai,India.Stockholder of ASME SA572 Grade 50 Cold Drawn Plate,ASTM A572 Grade 50 Cold Rolled Plate,ASME SA572 Grade 50 Hot Rolled Plate distributors in india.A572 Grade 42,50,55,60,65 Steel Plates Material Properties The following material properties are ASTM specifications and will be confirmed on the Mill Test Report.Grade Yield Point (ksi) Tensile Strength (ksi) Min.8 Elongation % 42 42 60 20 50 50 65 18 55 55 70 17 60 60 75 16 65 65 80 15 Chemical Composition The following composition properties are ASTM specifications for the A572 grades.Grade 42 +A516GR70N Cutting Parts|S355J2+N Machining parts_Steel BBNSTEEL export high quality steel plate of A516Gr70 steel,S355J2 steel,SA516GR70 steel,A516 Grade 70 steel Steel Plate,A516GR70N Cutting Parts,S355J2+N Machining parts.

A36 vs A572 machinability - Machines Machining

Apr 05,2007 SA572Grade 55 India machining#0183;Initially the machine shop recommended 1045 plate,but the costing is higher the A572.RE A36 vs A572 machinability EdDanzer (Mechanical) 23 Mar 07 22:42.A572 has a higher yield strength than A36,will cost a little more per pound and will machine better.A36 (Grade 50) versus A572 Gr 50 - Structural engineering I selected ASTM A572 Grade 50 rods because of the tensile strength of 65 ksi,which meets my shear resistance requirements.The project is Design-Build,and the contractor is requesting the use of ASTM A36,Grade 50 rods,which I'm assuming are more readily available (thus cheaper).7 Best Dishwashers In India 2021 Reviews Buying GuideFeb 22,2021 SA572Grade 55 India machining#0183;Voltas,is the Indias most trusted brand in India,and Beko,a leading international name in home appliances,together that bring you all the convenience your deserve.This is the highly efficient and durable dishwasher,its easy to install.It comes with touch button controls and ideal for nuclear families.

10 Best 4K TVs That You Can Buy In India In 2020

Oct 30,2020 SA572Grade 55 India machining#0183;Budget 4K TVs in India above Rs 1,00,000 9.55-inch LG NanoCell Ultra HD (4K) LED Smart TV (55NANO86TNA) If your pockets permit and want to buy a smart UHD TV from tier-one brand,in that case,this 55-inch LG 55NANO86TNA could be a perfect buy for you.It is one of the rear UHD TV in this price that comes with Low Input Lag,HDMI 2.1,HGiG results for this questionWhat is Gr 50 steel?What is Gr 50 steel?ASTM A572 Gr 50 steel material can be bended or shaped by cold work,also has increased resistance to atmospheric corrosion,which is good to increase steel structure service life.If you are interested in buying ASTM A572 Grade 50 steel plate,please contact us now for the latest price now.ASTM A572 Grade50,55,60 HSLA Structural Steel Plate-AGICO results for this questionWhat is ASTM grade 50 steel?What is ASTM grade 50 steel?Both ASTM A36 carbon steel and ASTM A572 grade 50 are iron alloys.Both are furnished in the as-fabricated (no temper or treatment) condition.They have a very high 99% of their average alloy composition in common.ASTM A36 Carbon Steel vs.ASTM A572 Grade 50 :

results for this questionWhat is 50 in grade?What is 50 in grade?Grade 50 is a high strength,low alloy steelthat finds its best application where there is need for more strength per unit of weight.Less of this material is needed to fulfill given strength requirements than is necessary with regular carbon steels.Grade 50 is used in general plate applications when the plate will be riveted,bolted,or welded.Speedy Metals Information for ASTM A572 Grade 50 Plate results for this questionFeedbackASTM A572 Grade50,55,60 HSLA Structural Steel Plate-AGICO

ASTM A572 Specification refers to High-Strength Low-Alloy Steel Plate for structural building,among the 5 steel grades of 42,50,55,60 and 65,Grade 50 is one most common steel in applications where need more strength and less weight,use steel plate of this grade other than ordinary carbon steel will make the steel structure with same steel strength but lighter weight. Brother HC1850 Sewing and Quilting Machine Product Description.For those in search of a versatile computerized sewing and quilting machine,the Brother HC1850 is an exceptional choice.This feature-packed and reliable quilting and sewing machine is great for quilting,sewing,basic monogramming,and decorative stitching.

55 inch tv

VIZIO 55-Inch M-Series Quantum 4K UHD LED HDR Smart TV with Apple AirPlay and Chromecast Built-in,Dolby Vision,HDR10+,HDMI 2.1,Variable Refresh Rate AMD FreeSync Gaming (M55Q8-H1) 4.2 out of 5 stars 20.$548.00 $ 548.00.FREE Shipping by .Usually ships within 2 to 3 days.Display Size 55 inches.Refresh Rate 120 hertz.

We Export SA572Grade 55 India machining to Following Countries:
Get In touch with
Product SERVICE ONLINE Contact us Steel Material Our Live Inventory:
Shipbuilding steel plate stock
Boiler steel plate stock
Weathering steel plate stock
Hot rolled steel sheet plate stock
Carbon steel plate stock
Alloy steel plate plate stock
Gas cylinder steel plate stock
Q235B steel plate plate stock
A36 steel plate plate stock
Q345B steel plate stock
09CuPCrNi-A steel plate stock
Pipeline steel plate stock
Low-carbon steel plate stock
Pressure vessel steel plate stock
Seamless steel pipe plate stock
Automotive steel plate stock
Wear-resistant steel plate plate stock
Low-alloy steel plate stock
Hot rolled coil plate stock
flat steel plate stock
Cowden Steel plate stock
Weather resistant steel plate stock
Marine engineering steel plate stock
SA572Grade 55 India machining Plate Manufacturer
SA572Grade 55 India machining Super Mirror Sheet / Plate Supplier
cold rolled SA572Grade 55 India machining plate distributor
SA572Grade 55 India machining Steel Plate dealer
SA572Grade 55 India machining hot rolled distributor
Carbon Steel diamond checkered plateSA572Grade 55 India machining Resistant exporter
High Quality SA572Grade 55 India machining Decorative Plate importer
what is grade a242 type 3 weather corten plate
sa516gr65 mill
steel concrete nail shooting nail with washer
s690ql1 astm equivalent
304 tp304 sus304 factory direct supply food grade stainless
china high pressure q235 astm a36 mild steel plate
sheet near me sheet profiles stainless plates
china 201 stainless steel strip manufacturers suppliers
2mm Thick SA572Grade 55 India machining Steel Plate exporter
SA572Grade 55 India machining plate supplier
Manufacturer preferential supply High Quality SA572Grade 55 India machining Steel plate
export heat resistant 6mm SA572Grade 55 India machining plate manufacturer
About

GABIKA SHIPBUILDING STEEL is specialized in steel plate export. As a professional and reliable steel plate supplier, we have built cooperation with over 30 countries and regions, including USA, Europe, Saudi Arabia, Egypt, Bangladesh, Sri Lanka, Korea, Vietnam, Myanmar and so on.

For any steel plates we do not have in stock, we have developed relationships with a large number of manufacturers, mill depots, and master distributors, which enables us to locate and supply even the most unusual sizes and grades as per customer requirements - so called "one station" services...

Read More
Contact us
Phone: 0086-371-86151827
Add: Zhengzhou city Henan, China

Our professional team will reply to you within one business day.Please feel free to contact us!