Alloy steel tube is one kind goes up in the foundation of carbon steel, join a kind purposefully or a variety of alloying element (wait like chromic, molybdenum, nickel, manganese, silicon, vanadium, titanium) the steel tube that makes.
One, what is alloy steel tube?
Alloy steel is in charge ofIt is one kind goes up in the foundation of carbon steel, join a kind purposefully or a variety of alloying element (wait like chromic, molybdenum, nickel, manganese, silicon, vanadium, titanium) the steel tube that makes.
Be in charge of photograph comparing with common carbon steel, the affiliation of these alloying element raised steel tube significantlyMechanical functionAndCorrosion resistance can, make its can get used to harsher environment.
2, the main characteristic that alloy steel is in charge of
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High strenth: Below identical weight, alloy steel tube can bear higher pressure and load.
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Exceedingly good high temperature resistant quality: Higher strength can retain below high temperature, produce creep not easily (slow be out of shape) .
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Be able to bear or endure goodly microtherm tenacity: Become not easily below microtherm environment fragile, suit to be used at microtherm equipment.
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Outstanding corrosion resistance: Right atmosphere, water, acerbity, alkaline wait for the counteractive ability with corrode medium to have better.
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Wearability: The surface is solidder, wear-resisting caustic capability is stronger.
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But heat treatment sex: Can pass quench, the heat treatment craft such as temper will adjust its function, satisfy specific requirement.
3, main alloying element reachs his action
High strenth: Below identical weight, alloy steel tube can bear higher pressure and load.
Exceedingly good high temperature resistant quality: Higher strength can retain below high temperature, produce creep not easily (slow be out of shape) .
Be able to bear or endure goodly microtherm tenacity: Become not easily below microtherm environment fragile, suit to be used at microtherm equipment.
Outstanding corrosion resistance: Right atmosphere, water, acerbity, alkaline wait for the counteractive ability with corrode medium to have better.
Wearability: The surface is solidder, wear-resisting caustic capability is stronger.
But heat treatment sex: Can pass quench, the heat treatment craft such as temper will adjust its function, satisfy specific requirement.
| Alloying element | Main effect |
|---|---|
| Chromic | Rise corrosion resistance and fight oxidisability, it is the main element of stainless steel. Also can increase strength. |
| Molybdenum | Increase high temperature strengthAnd fight creep ability, increase be able to bear or endure the ability that nod corrode. |
| Nickel | Raise tenacity, especially microtherm tenacity, enhance corrosion resistance. |
| Manganese | Raise intensity and hardness. |
| Silicon | Rise intensity, flexibility and fight oxidisability. |
| Vanadium | Refine grain, raise intensity and tenacity. |
4, qualitative brand of common capable person and classify
Sort of alloy steel tube is various, it is below a few common with important category:
1.By main alloy series is classified
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Series of chromic molybdenum steel: This is commonly used high temperature high pressure is in charge of with alloy steel.
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P91 (T91) , P92: Utility boiler, exceed the crucial material that exceeds critical unit, have extremely high high temperature strength.
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15CrMoG: Use at making the superheater of 550 ℃ of mural lukewarm ≤ , header and vapour tubing.
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12Cr1MoVG: Use extensive high-pressured boiler pipe.
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Stainless steel series: Contain tall proportional chromium (normally > 10.5% ) , corrosion resistance is admirable.
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304/304L: General-purpose stainless steel, corrosion resistance is good.
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316/316L: Contain molybdenum, be able to bear or endure the capability that nod corrode is stronger, apply to ocean and chemical environment especially.
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321: Contain titanium, fight ability is corroded between brilliant strong.
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Series of microtherm nickel steel: Use at the liquefied natural gas (LNG) wait for microtherm environment.
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9% Ni steel: Can be in - of 196 ℃ extremely admirable tenacity maintains below microtherm.
2.Press utility classification
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The structure uses alloy steel tube: Use at making structural member of high strenth machinery, wait like frame of grab jib, car.
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The fluid is carried with alloy steel tube: Use at carrying the fluid of caustic, high pressure or high temperature, be like conduit of oil, chemical industry.
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Boiler canal and heat exchanger are in charge of: Use at the equipment such as utility boiler, heat exchanger, the demand is extremely high high temperature resistant and be able to bear or endure high-pressured function.
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Hydraulic pressure pillar is in charge of: Use at hydraulic pressure bracket, demand high strength and wearability.
5, basically manufacture technology
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Hot-rolling (extruding): After billet heats, shape through card punch and rolling mill. Apply to canal of large requirements, large wall.
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Cold-drawing (make friends): To hot-rolling below room temperature the canal has further treatment, dimension precision is tall, the surface is bright and clean, intensity is higher also.
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Solder: Will solder after alloy stencil steel or metal strip are curly shape. Manufacturing efficiency is tall, cost is inferior.
6, applied domain
Series of chromic molybdenum steel: This is commonly used high temperature high pressure is in charge of with alloy steel.
-
P91 (T91) , P92: Utility boiler, exceed the crucial material that exceeds critical unit, have extremely high high temperature strength.
-
15CrMoG: Use at making the superheater of 550 ℃ of mural lukewarm ≤ , header and vapour tubing.
-
12Cr1MoVG: Use extensive high-pressured boiler pipe.
Stainless steel series: Contain tall proportional chromium (normally > 10.5% ) , corrosion resistance is admirable.
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304/304L: General-purpose stainless steel, corrosion resistance is good.
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316/316L: Contain molybdenum, be able to bear or endure the capability that nod corrode is stronger, apply to ocean and chemical environment especially.
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321: Contain titanium, fight ability is corroded between brilliant strong.
Series of microtherm nickel steel: Use at the liquefied natural gas (LNG) wait for microtherm environment.
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9% Ni steel: Can be in - of 196 ℃ extremely admirable tenacity maintains below microtherm.
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The structure uses alloy steel tube: Use at making structural member of high strenth machinery, wait like frame of grab jib, car.
-
The fluid is carried with alloy steel tube: Use at carrying the fluid of caustic, high pressure or high temperature, be like conduit of oil, chemical industry.
-
Boiler canal and heat exchanger are in charge of: Use at the equipment such as utility boiler, heat exchanger, the demand is extremely high high temperature resistant and be able to bear or endure high-pressured function.
-
Hydraulic pressure pillar is in charge of: Use at hydraulic pressure bracket, demand high strength and wearability.
5, basically manufacture technology
-
Hot-rolling (extruding): After billet heats, shape through card punch and rolling mill. Apply to canal of large requirements, large wall.
-
Cold-drawing (make friends): To hot-rolling below room temperature the canal has further treatment, dimension precision is tall, the surface is bright and clean, intensity is higher also.
-
Solder: Will solder after alloy stencil steel or metal strip are curly shape. Manufacturing efficiency is tall, cost is inferior.
6, applied domain
Hot-rolling (extruding): After billet heats, shape through card punch and rolling mill. Apply to canal of large requirements, large wall.
Cold-drawing (make friends): To hot-rolling below room temperature the canal has further treatment, dimension precision is tall, the surface is bright and clean, intensity is higher also.
Solder: Will solder after alloy stencil steel or metal strip are curly shape. Manufacturing efficiency is tall, cost is inferior.
Alloy steel tube is modern industry " hemal " and " framework " , apply extensively at:
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Electric power and energy industry: The superheater of utility boiler, reheater, advocate vapour conduit; Nuclear phone equipment; Extract and carry conduit of oil and natural gas.
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Petro-chemical industry: Conduit of the reactor of refinery, chemical plant, heat exchanger, craft, carry all sorts of caustic medium.
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Machinery makes a trade: The part of tall stress construction of heavy machinery, project machine.
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Auto industry: Motor component, tranission shaft, frame.
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Aerospace: The component with the counterpoise quantity such as component of landing gear, motor and strength extremely high demand.
7, purchase with choose a point
When choosing alloy steel tube, need considers the following crucial factors:
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Working environment: Temperature, pressure, medium (caustic) .
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Mechanical function asks: Tensile strength, succumb tenacity of intensity, concussion.
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Material is qualitative with the standard: Specific place wants material qualitative name (like P91, 316L) with executive standard (be like ASTM, DIN, GB) .
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Measurement standards: External diameter, wall thick, length and tolerancepublic errand limits.
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Detect requirement: Whether to need tripartite to examine, and specific nondestructive detects (like UT, RT) change with manage examine requirement.
Summary
Alloy steel is in charge ofIt is the steely product of high-tech content, it carries fine clever " alloy is changed " design, gifted the vitality that rolled steel surmounts its itself, make the fundamental material that the crucial industry domain such as the sources of energy that prop up, chemical industry, machinery develops. Choose appropriate alloy steel tube, the safety to equipment, reliable move with macrobian life crucial.
