What is the material of the flange: SA 350 LF2, SA 182 182 Gr F1, what is the corresponding national

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SA738 Heat-treated carbon-manganese-silicon steel plate for medium and low temperature pressure vessels Standard No. GB T17107 Grade 15Crmor, 13mnnimonbr Grade B means that the quality grade of this batch of materials is grade B **About 5900 yuan Ton is the Shanghai market** For reference only SA516 Carbon steel plate for medium and low temperature pressure vessels Standard No. GB T4327 Grade 0Cr17Ni7AL SA333 Seamless and welded nominal steel pipe for low temperature Standard No. GB T7659 Grade: ZG230—450H SA193 Alloy steel and stainless steel bolt material standard for high temperature GB: T6478 Grade: ML22MN SA194 Carbon steel and alloy steel nut for high-temperature and high-pressure bolts, standard fiber hunger standard number: GB T700, grade Q215, AISI 4140, Brinell Hardness 248 to 352 steel, alloy structural steel, standard number: GB T8162 Grade 42CRMO Reference: Mechanical properties of slag wheels of Chinese and foreign iron and steel materials, such as vertical letter quick reference manual.

SA350LF2 is a low-alloy steel of the American standard.

Chemical composition of ( ) Pi Jing:

c： mn： p： s：

si： ni： cr： mo：

v： nb： cu：

Mechanical properties: tensile strength 485-655

Yield strength 250

Stretch pure grip elimination to do the growth rate of 22

Section shrinkage 30

Hardness HB 140-197

A350 LF2 belongs to the American standard low-temperature steel forging, the implementation standard: ASTM A350 A350M-2018

A350 LF2 belongs to the carbon steel and low alloy steel forgings required for notch toughness test for pipeline components, and the chemical composition of A350 LF2 is shown in the following figure

The mechanical properties of A350 LF2 are shown in the following figure

SA 350 LF2 is a low alloy steel forging of the American standard. After normalizing treatment, the grade is LF2, class 1, the tensile strength is in the range of 485MPa--655MPa, and the low temperature impact test of -46° is required. It can be repaired with low-temperature alloy electrodes.

After the repair, it is necessary to temper and carry out penetration and other flaw detection.

Welding wires can be used with AWS E7015-A1 or E7016-A1 or E7018-A1.

Main chemical components:

c ；mn ；p ；s ； si ； ni ；cr ； mo ；v ； nb ； cu 。

Tensile strength 485-655 ; Yield strength 250Elongation 22 ; Section shrinkage 30Hardness HB 140-197

American standard LF2 material, low-temperature steel. If there is anything unclear you can contact me, name my buckle.

16mo3 is a foreign grade of steel, which is used to make boilers or pressure vessels, and there is no corresponding grade in China.

Standard: EN10028 EN10222-2 2017 (European standard, foreign standard).

Name: It is named according to the content of C (carbon) and Mo (molybdenum), which means that the carbon content of this steel plate is about and about, and the content of molybdenum is 3%.

16mo3 is equivalent to the domestic grade: 12cr1mov.

A foreign grade steel plate, used to make boilers or pressure vessels. Name: 16 molybdenum three.

Standard: EN10028 (European standard, foreign standard).

Name: It is named according to the content of C (carbon) and Mo (molybdenum), which means that the carbon content of this steel plate is about 160, and the content of molybdenum is about 300.

Heat treatment: normalizing or normalizing + tempering equivalent to domestic grade: 12cr1mov

16mo3 welding is different from other materials, it should be preheated first, and the weld should be kept warm for about 30 minutes after the welding is completed 16mo3 steel plate manganese is also an important alloying element in steel, and it is also an important hardenability element, which has a great impact on the toughness of the weld metal.

When the mn content of 16Mo3 steel plate is < 0 05%, the toughness of the weld metal is very high;

16mo3 steel plate is very brittle when the mn content is 3%;

When the mn content of 16Mo3 steel plate = 0 6 1 8%, the weld metal has higher strength and toughness.

What is the effect of sulfur (S) on weldability of 16Mo3 steel plate? Sulfur is often found in steel in the form of iron sulfide and is distributed in a reticulated pattern at the grain boundary, thus significantly reducing the toughness of the steel. The eutectic temperature of iron plus iron sulfide is low (985), so when performing hot processing, because the processing start temperature is generally 1150 1200, and the eutectic of iron and iron sulfide has been melted, resulting in cracking during processing, this phenomenon is the so-called "hot brittleness of sulfur".

This property of sulfur causes the steel to develop hot cracks when welded. Therefore, the amount of sulfur in steel is generally strictly controlled. The main difference between ordinary carbon steel, high-quality carbon steel and high-grade high-quality steel is the amount of sulfur and phosphorus.

The 16Mo3 chemical composition Cr content is: , while the 12Cr1MoV chemical composition Cr content. So these two materials do not belong to the same material.

16MO3 is a steel plate for pressure vessels, EN10028-2 specified grade chromium-molybdenum steel alloy is used as a weldable steel in the manufacture of industrial boilers and stainless steel pressure vessels in the oil, gas and chemical industries.

16MO3 corresponds to the national standard 12CR1MOVR, in addition to 16MO3 implementation standard: EN10028 (European standard, foreign standard); Numeric number:

A350 LF2 belongs to the American standard low-temperature steel forging, the implementation standard: ASTM A350 A350M-2018

A350 LF2 belongs to the carbon steel and low alloy steel forgings required for notch toughness test for pipeline components, and the chemical composition of A350 LF2 is shown in the following figure

The mechanical properties of A350 LF2 are shown in the following figure

A350 is the American standard for low-temperature steel forgings, and LF2 is the grade.

A350LF2 Chemical Composition:

c：mn：p：s：

si：ni：

cr：mo：

cu：co：

v: Mechanical Properties:

Tensile strength: 485-655MPa

Yield strength: 250MPa

Section shrinkage 30

Hardness: less than 197HB

Equivalent to 16mnd in our country

ASTM A350-LF2 stainless steel corresponds to the national standard 16MN material.

1. ASTM A350-LF2 stainless steel is a low-temperature low-alloy steel forging, which is equivalent to the domestic 16MN material.

2. ASTM A350 is the American standard for low-temperature steel forgings, and LF2 is the grade. The chemical composition is C:; mn：

p：；s：；si：

ni：；cr：；mo：

cu：；co：；v：。

3. ASTM A350-LF2 stainless steel mechanical properties: tensile strength: 485-655MPa; Yield strength: 250MPaSection shrinkage 30Hardness: less than 197HB

MN is called low-alloy high-strength structural steel, with a carbon content of manganese (MN), silicon (Si), vanadium (V), niobium (NB) and titanium (Ti), etc., which are added to the main alloying elements. 16MN is the old national standard grade, and now it is classified as low-alloy high-strength structural steel, and the current grade is called Q345, but Q345 steel is the replacement of the old grade of 12MNv, 14MNNB, 18NB, 16MNre, 16MN and other steel grades, rather than only replacing 16MN steel.

MN steel belongs to carbon-manganese steel, the carbon content is around the right, and the yield point is equal to 343MPa (the strength level belongs to 343MPa). 16Mn steel has less alloy content and good weldability, so it generally does not need to be preheated before welding. However, since the hardening tendency of 16mn steel is slightly greater than that of mild steel, preheating measures are required to prevent cold cracks when welding at low temperatures (such as winter open-air operations) or on large rigidity and thick structures.

A350 LF2 belongs to the American standard low-temperature steel forging, the implementation standard: ASTM A350 A350M-2018

A350 LF2 belongs to the carbon steel and low alloy steel forgings required for notch toughness test for pipeline components, and the chemical composition of A350 LF2 is shown in the following figure

The mechanical properties of A350 LF2 are shown in the following figure

It can be replaced by 16MND in the domestic JB4727, which is also a low-temperature material. However, it is necessary to pay attention to the content of carbon and manganese, there is a requirement of carbon equivalent, and there is no problem with the low temperature impact after quenching and tempering treatment.

A350 LF2 belongs to the American standard low-temperature steel forging, the implementation standard: ASTM A350 A350M-2018

A350 LF2 belongs to the carbon steel and low alloy steel forgings required for notch toughness test for pipeline components, and the chemical composition of A350 LF2 is shown in the following figure

The mechanical properties of A350 LF2 are shown in the following figure

ASTM A 350 LF2 Ferritic and martensitic steel castings for low-temperature compressed parts.

ASTMA350 is not a material, but a standard number. In this standard, LF1 and LF2 are two different steels, with the same chemical composition requirements and different mechanical property requirements. Whereas, LF2 has two levels, CL1 and CL2. There should be.

A350 LF2 belongs to the American standard low-temperature steel forging, the implementation standard: ASTM A350 A350M-2018

A350 LF2 belongs to the carbon steel and low alloy steel forgings required for notch toughness test for pipeline components, and the chemical composition of A350 LF2 is shown in the following figure

The mechanical properties of A350 LF2 are shown in the following figure