Company name: Henan run Lu Trading Co., Ltd. contact: Yu Shang mobile phone number: 15639797063 Xiamen marine pipeline steel chemical composition long service life,
10CrMoAl material is the most ideal pipeline and processing material for coastal power plants, coastal oil fields, coastal natural gas and petrochemical plants to transport water, oil and gas and sea water medium.
10CrMoAl is a kind of special steel for seawater corrosion resistance. 10CrMoAl material is the most ideal pipeline and processing material for coastal power plants, coastal oil fields, coastal natural gas and petrochemical plants to transport water, oil and gas and sea water medium. It can also be used to make the flange of valve.
Essential information
12Cr1MoV, alloy structural steel. Unified numeric code: A31132. Standard: GB/T3077-1999
chemical composition
C:0.08~0.15Si:0.17~0.37
Mn:0.40~0.70
Cr:0.90~1.20
Mo:0.25~0.35
V:0.15~0.30
mechanical property
[sample blank size]
30mm
[heat treatment]
Quenching heating temperature (DEG): 970; coolant: empty
Tempering temperature (DEG): 750; coolant: empty
[mechanical properties]
Tensile strength (b/MPa): 490
The yield point (s/MPa): 245
Elongation (delta 5/%): less than 22
Section shrinkage (PSI /%): 50
Impact absorbing energy (Aku2/J): 71
The impact toughness value of alpha kV (J/cm2): 88 (9)
Brinell hardness (HBS100/3000) (high temperature annealing or tempering): less than 179
Under normal temperature: allowable tensile stress (sigma w/MPa): 93 allowable bending stress (sigma w/MPa): 112 allowable shear stress (T/MPa): 56
Main characteristics
Main characteristics: compared with 12CrMoV steel, this steel has higher oxidation resistance and thermal strength. The creep limit of the steel is very close to that of the rupture strength, and it has high plasticity in the case of sustained tension; the process and weldability of the steel are good, but the preheating temperature should be up to 300 degrees before welding, and the stress treatment should be taken after welding.
It is widely used in Superheater, header and main steam pipe of high pressure, super high pressure and subcritical power plant boilers. At 580 C, it still has high thermal strength and oxidation resistance, and has a high durable plasticity. The production process is simple and the welding performance is good, but it is sensitive to normalizing cooling rate. Pearlite spheroidization can be produced by long-term use at 580 C.
Example of application
This kind of steel is mainly used in normalizing and high temperature tempering, which can be used to manufacture overheated steel pipes, pipes, serpentine pipes and other forgings in the high voltage equipment with operating temperature not exceeding 570~585 degrees centigrade.
Correlation calculation
Formula for calculating the weight of alloy tubes:
[(outer wall thickness) * wall thickness]*0.02466=kg/ m (weight per metre) (unit mm)
Formula for calculating weight of alloy steel plate:
Long x width x thickness x 0.00785=kg
Detailed introduction
The two digit of the steel at the beginning that the carbon content of steel, the average carbon content of the very few, such as 40Cr, 25Cr2MoVA alloy tube
The main alloying elements in steel, except for some micro alloying elements, generally expressed as a few percent. When the average content of alloy < 1.5%, grade of steel in general only marked the element symbol, without showing the content, but often in special circumstances in confusion, symbols also marked with the number "1", such as steel "12CrMoV" and "12Cr1MoV", the chromium content is 0.4-0.6%, which is 0.9-1.2%, the rest all components of the same. When the alloy element average content is more than 1.5%, more than 2.5%, more than 3.5%...... The content should be marked after the element symbol, which can be expressed as 2, 3, 4...... Etc.. For example, 18Cr2Ni4WA.
The steel vanadium V, titanium Ti, AL aluminum, boron and rare earth alloy elements such as B RE, are micro alloying elements, although the content is very low, still should be marked in the steel. For example, 20MnVB steel. Vanadium is 0.07-0.12%, boron is 0.001-0.005%.
The high-grade steel should be added in the steel "A" at the end, as distinguished from the general quality of steel.
The use of special alloy structural steel, steel dubbed (or suffix) on behalf of the steel used symbols. For example, rivet special steel 30CrMnSi steel, expressed as ML30CrMnSi.
The alloy pipe and seamless pipe have both relations and differences, and they can not be confused.
Alloy pipe is a steel pipe according to the production materials (or material) to define the definition is made of alloy pipe and seamless steel pipe; is in accordance with the production process (seamed seamless) defined, is different from the seamless pipe joints, including welded pipe and spiral tube.
12Cr1MoV corresponding to the foreign brands 16mo3. welding with other different materials, first preheating, welding and weld should be completed in 30 minutes holding important alloying element in steel and manganese 16mo3 steel, hardenability is also an important element, which has a great impact on the weld metal toughness. When the Mn content is < and 0.05%, the toughness of the weld metal is very high; when the Mn content is > and 3%, the 16mo3 steel plate is very brittle; when the Mn content is 0.6~1.8%, the 16mo3 steel plate has higher strength and toughness than the 16mo3 steel plate.
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