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  • Stainless steel is usually divided into 5 types:Ferritic – These steels are based on Chromium with small amounts of Carbon usually less than 0.10%. These steels have a similar microstructure to carbo...

  • Stainless steel is easy to clean. Washing with soap or mild detergent and warm water followed by a clear water rinse is usually quite adequate for domestic and architectural equipment. Where stainless steel has become extremely dirty with signs of surface discolouration (perhaps following periods o...

  • IntroductionSalt spray testing is an accepted method for assessing the suitability of stainless steel parts and fabrications that are likely to encounter chloride environments in service.For any particular part, tested under laboratory conditions, a difference in performance between say, 430 (1.401...

  • It is often thought that a magnet is used to test the quality of stainless steel. If the stailes steel is nonmagnetic, the product is genuine. If it is magnetic, the product is fake. In fact, this ...

  • Stainless steel surface corrosion can occur. The reasons for this can vary and include inappropriate stainless steel selection for the service environment, surface contamination with iron or carbon s...

  • Yes. The 300 series stainless steel can be "hardened" but only by "work hardening." This is done by cold working the material. This can be done by cold rolling to lighter thicknesses, cold "drawing" ...

  • What is a Non-Ferrous Metal? When a metal is defined as non-ferrous it means that it does not have a significant amount of iron in its chemical composition. Note the word “significant”; nearly all m...

  • Yes. Stainless steel has excellent properties at both extermes of the temperature scale.Stainless steel can be used down to liquid nitrogen temperatures and up to about 1800°F ...

  • The use of the letter L after the grade number(i.e 304L,316L) means that the carbon content is resisted to a maximum of 0.03%, in stainless steels that are not low carbon, maximum levels may be set a...

  • Are all stainless steels non-magnetic?No. The austentic or 300 series stainless steels are generally non-magnetic but high levels of cold work make them somewhat magnetic. Castings made out of these ...

  • Scratches are difficult to remove. Most kitchen appliances , sinks, and counters have a No. 4 polished finish with short directional polishing lines. Restoring this finish to its orginal apperance re...

  • The term "Pickled" means that the material has been subjected to an acid solution that has been spe...

  • The term"duplex"describes the microstructure that is characteristic of this family of stainless steels which is typically equal parts austenite and ferrite. Duplex stainless steels characterized by high strength levels and provide a range of corrosion resistance levels. They are used in application...

  • The first number is the amount of chromium that is contained in the stainless, so 18 is 18% chromium. The second number is the amount of nickel. so 8 stands for 8% nickel. So 18/8 means that this stainless steel contains 18% choromium and 8% nickel. 18/10 is 18% chromium and 10% nickel. Both 18/8 a...

  • The AISI (American Iron and Steel Institue) was the originator of the 300 and 400 series numbering system(i.e. Type 304 stainless steel) They also published a stainelss steel products manual that li...

  • Metals are rarely used in their pure form. Alloying elements are added to change their properties. ...

  • Stainless steel is produced in an electric furnace where carbon electrodes contact recycled stainless steel scrap and various alloys of chromium ( and nickel, molybdenum etc.depending on the stainless steel type). Current is passed through the electrode and the temperature increase to a point where...

  • Localized corrosion such as pitting and crevice corrosion of stainless steels generally occurs in the presence of halide ions, typically chloride (e.g. coastal and deicing chloride salts – sodium, calcium or magnesium chlorides; hydrochloric acid; bleach – sodium or calcium hypochlorite; and other ...

  • What's the benefits of stainless steel ? Corrosion resistanceLower alloyed grades resist corrosion in atmospheric and pure water enviroments. while high-alloyed g...

  • What are AISI Specifications for stainless steel? The AISI (American Iron and Steel Institute) was the originator of the 300 and 400 series numbering system (i.e. Type 304 stainless steel). They also published a stainless steel products manual that listed these ...

  • BS EN 10217-7 chemical composition tablesCorrosion resistant steelsDesignationChemical composition (% by mass - max unless stated)Steel nameSteel numberCSiMnPSCrMoNiCuNOthersIn 10296-2?Austenitic steelsX2CrNi18-91.43070.0301.002.000.0450.01517.5/19.5-8.0/10.0-0.11-YesX2CrNi19-111.43060.0301.002.000.0450.01...

  • Different between refining furnace and intermediate frequencyThe chemical composition of medium frequency furnace is unstable, and some chemical elements are easy to over proof, and the content of carbon is relatively high. So it is not suitable for deep processing. Second, because of the material reasons...

  • Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a non-consumable tungstem electrode to produce the weld. The weld area and electrode is protected from oxidation or other atmospheric contamination by an inert shielding gas (argon or heliu...

  • A No. 1 finish has rough, dull, and non-uniform appearance. There may be shiny spots were surface imperfections were removed by grinding. It is generally used in industrial applications, such as equipment for elevated temperature service. No. 2B Finish is a bright cold rolled finish commonly produced in t...

  • How do I choose which stainless steel to use? Most decisions about which steel to use are based on a combination of the following factors:What is the corrosive environment? – Atmospheric, water, concentration of particular chemicals, chloride content, presence of acid.What is th...

  • What's the General Principles for selection of stainless steelsStainless steels are defined as iron alloys with a minimum of 10.5% chromium.Other alloying elements are added to enhance their structure and properties, but fundamentally, stainless steels are considered for selection as steels with corrosion ...

  • The most common forms of corrosion in stainless steel are:1 Pitting corrosion - The passive layer on stainless steel can be attacked by certain chemical species. The chloride ion Cl- is the most common of these and is found in everyday materials such as salt and bleach. Pitting corrosion is avoided by maki...

  • Although stainless steel is much more resistant to corrosion than ordinary carbon or alloy steels, in some circumstances it can corrode. It is 'stain-less' not 'stain-impossible'. In normal atmospheric or water based environments, stainless steel will not corrode as demonstrated by domestic sink units, cu...

  • Most decisions about which steel to use are based on a combination of the following factors:What is the corrosive environment? – Atmospheric, water, concentration of particular chemicals, chloride content, presence of acid.What is the temperature of operation? – High temperatures usually accelerate corrosi...

  • Stainless steel is theoretically 100% recyclability and its long term life makes it an ideal environmental performer much better than many other materials. Stainless steel products are designed to have a long life; often spanning over several decades. This long term life generally is the reason for choosin...

  • Stainless steel is generally highly resistant to attack from acids, but this quality depends on the kind and concentration of the acid, the surrounding temperature, and the type of steel. Type 904 is resistant to sulfuri acid at room temperature, even in high concentrations; types 316 and 317 are resistant below 10%; and type 304 should not be used in the presence of sulfuric acid at any concentr...

  • EN 10296-2 is the material standard for stainless and heatresisting steels for circular welded tubes for mechanical and general engineering (ie not pressure) purposes. This new standard was first published in December 2005 , which is now withdrawn.Included in the standard are chemical compositions, delivery conditions and process route symbols, ambient temperature mechanical properties, some addit...

  • Various types of stainless steel are used across the whole temperature range from ambient to 1100 deg C. The choice of grade depends on several factors:Maximum temperature of operationTime at temperature, cyclic nature of processType of atmosphere, oxidising , reducing, sulphidising, carburising.Strength requirementIn the European standards, a distinction is made between stainless steels and heat-...

  • If treated or stored incorrectly, any grade of stainless steel may discolor or stain. To maintain optimum appearance, the surface should be cared for regularly.The quality of installation affects the durability and lifespan of stainless steel. Therefore, it is important to make sure stainless steel is in good condition before installation. Normally, giving it a quick clean is enough prior to insta...

  • Stainless steel is 100% recyclable . An average stainless steel object is composed of about 60% recycled material of which approximately 40% originates from end-of-life products and about 60% comes from manufacturing processes. According to the International Resource Panel's Metal Stocks in Society report. , the per capita stock of stainless steel in use in society is 80–180 kg in more developed c...

  • Brushed or dull polished metal is metal with a unidirectional satinfinish. It is produced by polishing the metal with a 120–180 grit belt or wheel then softening with an 80–120 grit greaseless compound or a medium non-woven abrasive belt or pad.Commonly brushed metals include stainless steel , aluminium and nickel. Brushed finishes are popular in both small appliances and whiteware, and feature i...

  • Mill finish refers to the surface textures (or finish) of metal after it exits a rolling mill , extrusiondie, or drawing processes, including sheet, bar, plate, or structural shapes. This texture is usually rough and lacks lustre; it may have spots of oxidation or contamination with mill oil. Most mill finish surfaces are machined or treated with polishing, industrial etching, or some other surf...

  • Stainless steel differs from carbon steel by the amount of chromium present. Unprotected carbon steel rusts readily when exposed to air and moisture. This iron oxide film (the rust) is active and accelerates corrosion by making it easier for more iron oxide to form. Since iron oxide has lower density than steel, the film expands and tends to flake and fall away. In comparison, stainless s...

  • In metallurgy, stainless steel, also known as inox steel or inox from French inoxydable (inoxidizable), is a steel alloy with a minimum of 10.5% chromium content by mass.Stainless steel is notable for its corrosion resistance, and it is widely used for food handling and cutlery among many other applications.Stainless steel is used for corrosion-resistant tools such as this nutcracker.Stainless s...

  • According to the production processes, stainless steel tubes divided into seamless tubes and welded tubes. The raw material of seamless steel tube is the round bar billets. Its production techniques are hot rolling and cold drawing.Production processes of hot rolling seamless stainless steel tube : round bar billets →heating→punch the hole→three roll cold cross rolling, rolling in succession and e...