One, what is stainless steel canal?

Stainless steel canalIt is a kind of hollow strip steel products, withNot rust, anti-corrosiveFor major attribute. Its " do not become rusty " contain secretly in Yu GangTall proportional chromium (Cr)(normally not under 10.5% ) . Chromium is in when be being contacted with air, one can be formed in the surface of steel paper-thin and solid film of compact rich chromic oxidation (passivation film) , prevent oxygen atom to continue to invade, obtain thereby fight rustily ability.

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2, the main characteristic of stainless steel canal

1. Outstanding corrosion resistance: This is the function of its core, of a variety of medium such as can counteractive air, water, acerbity, alkaline, salt corrode.

2. High strenth and tall hardness: Have good mechanical performance, especially the brand of cold working of a few courses or specific heat treatment.

3. Wholesome and avirulent: Material qualitative safety, not separate out is harmful material, to fluid free from contamination.

4. Beautiful and bright and clean: The surface can machine lens face, grind arenaceous, play a variety of effects such as silk, contemporary sense is strong, easily clean.

5. Heat-resisting and be able to bear or endure microtherm: Stainless steel of a few austenite can maintain good performance below high temperature, and still have good tenacity a few more additionally below microtherm.

6. 100% can reclaim: Accord with environmental protection and can develop a concept continuously.

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3, ultimate cluster

The classified way that stainless steel provides is diversiform, common is to pressMetallographic organizationAndManufacturing technologyClassification.

(one) organize classification by metallographic (this is essential classification)

1. Austenite stainless steel

• 304 (0Cr18Ni9): All-purpose steel, feed grade, corrosion resistance is good, use at living in equipment of adornment, food, chemical industry to wait.

• 304L (00Cr19Ni10): Exceed low carbon, fight ability is corroded between brilliant stronger, after be being used at soldering cannot the component of heat treatment.

• 316 (0Cr17Ni12Mo2): Join on 304 foundationsMolybdenum, Be able to bear or endure the capability that nod corrode is extremely strong, apply to ocean and chemical corrosion environment especially.

• 321 (1Cr18Ni9Ti): Contain titanium, fight ability is corroded between brilliant strong.

• Characteristic: Without magneti or weak magneti, corrosion resistance integral performance is good, tenacity and plasticity are admirable, it is a application is wide kind.

• Plant on behalf of steel:

Martensite stainless steel

• Characteristic: Have magneti, can pass heat treatment sclerosis, intensity and hardness are tall, but corrosion resistance is opposite poorer.

• Plant on behalf of steel: 410 (1Cr13), 420 (2Cr13). Commonly used wait at making part of lamina of cutting tool, turbine, valve.

Ferrite stainless steel

• Characteristic: Have magneti, the volume that contain chromium is high (normally > 12% ) , be able to bear or endure chloride stress corrodes function excel austenite, but cannot pass heat treatment aggrandizement.

• Plant on behalf of steel: 430 (1Cr17). Commonly used wait at building burner of component of adornment, home appliance, fuel.

Double photograph stainless steel

• Characteristic: Hold austenite and ferrite organization concurrently, intensity is 2 times of austenite stainless steel commonner, have at the same time be able to bear or endure admirably to chloride stress is corroded and nod corrode ability.

• Plant on behalf of steel: 2205 (00Cr22Ni5Mo3N). Engrave an environment with Yu Ke, be like equipment of maritime oil platform, chemical industry, papermaking.

(2) by production craft is classified

1. Stainless steel is not had seam a canal

• Workmanship: Pass perforative, hot-rolling, cold rolling / the craft production such as cold-drawing.

• Characteristic: Bear control capacity strong, can use at high-pressured system, whole does not have welding line equably.

• Application: Of facilities of chemical industry, oil, powerThe fluid carries conduit, Boiler canal, Heat exchanger canal.

Stainless steel solder take-overs

• Workmanship: stainless steel board / the belt is curly after shaping, through soldering (like plaa solder, argon arc solder, high frequency solder) make.

• Characteristic: Dimension precision is tall, the wall is large even, manufacturing efficiency is tall, cost is low, bao Bi provides producible large line of action.

• Application: Decorate a canal(like stair armrest, protect column) , Goods canal(be like furniture, appliance) , Fluid duct(extremely not tall to pressure demand when) .

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4, basically use a field

The application that stainless steel provides permeates all and modern industry and life domain almost:

• Building and adornment: Stair armrest, protect wall of window of column, door, act, allpox, canopy. Stair armrest, protect wall of window of column, door, act, allpox, canopy.. Basically take-over with solder)

• Household and furniture: Hutch defends bracket of things, conduit, furniture, ambry. Hutch defends bracket of things, conduit, furniture, ambry.. Basically take-over with solder)

• Food and pharmacy: Food machines medical and machinery of product line of equipment, beverage, pharmacy, embedded content. RequirementHigh wholesome level, multi-purpose304/316L.

• Petro-chemical: Carry the craft conduit of caustic medium, heat exchanger, pressure vessel. Carry the craft conduit of caustic medium, heat exchanger, pressure vessel.. Multi-purpose without seam a canal)

• Car and traffic: Car vent-pipe (multi-purpose ferrite stainless steel) , structure of orbit traffic car.

• The sources of energy and environmental protection: System of equipment of phone of device of to decoke of power plant flue gas, nucleus, water treatment.

• Machinery and equipment: Make all sorts of mechanical structural member, bearing, valve.

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5, type selecting should be nodded

Choosing appropriate rubiginous steel tube is to ensure project success and cost pilot are crucial:

1. Corrosion environment: This is first consideration element.

• General atmosphere, water: 304 enough are contented.

• Coastal, chemical plant (contain chloric ion): Must choose316/316L.

• Environment of high pressure of strong acid, high temperature: Need a considerationShuang XianggangOr more advanced and other alloy.

Mechanical function asks:

• Whether to needHigh strenth? Shuang Xianggang or martensite stainless steel are a choice.

• Whether to needHigh temperature resistant? The refractory steel such as 310S is a choice.

Treatment and solder:

• Whether to need to solder often? Be like,choose low carbon name304LOr316LCorrode in order to avoid between brilliant.

• Whether to need deep punch? Plasticity of austenite stainless steel is good.

Cost budget:

• 304 it is the choice with general economy.

• 316 contain molybdenum because of its, cost is remarkable prep above 304.

• The price of special type stainless steel such as Shuang Xianggang is higher.

Exterior requirement:

• Choice finishing accords with the tubal material of the requirement, like light, inferior ooth, pull silk to wait.

Summary

Stainless steel canalIt is one of cornerstone of modern industry civilization, it is core with its distinctive corrosion resistance, outspread an intensity, sanitation, beautiful wait for multiple advantage.

Guideline of simple type selecting:

• Daily adornment, furniture, food is contacted: First selection304.

• Medical treatment of coastal, chemical industry, high end: First selection316/316L.

• Conduit of industry of high pressure, high temperature: First selectionStainless steel is not had seam a canal.

• Fluid of large construction, adornment, low-pressure power: First selectionStainless steel solder take-overs(cost is lower) .

Understand the classification that stainless steel provides and character, can help you be found in numerous choice match, a that of economy.