What material is similar to A36 material in the national standard?

In the national standard, the material similar to A36 is Q235.

Q235 ordinary carbon structural steel is also known as A3 steel, Q represents the yield limit of this material, and the following 235 refers to the yield value of this material, which is about 235MPa.

And with the increase of the thickness of the material, its yield value decreases (plate thickness diameter 16mm, yield strength of 235MPa; 16mm《Plate thickness diameter 40mm, yield strength of 225MPa; 40mm, thickness 60mm, yield strength of 215mpa.

60mm《Plate thickness diameter 100mm, yield strength of 205MPa; 100mm (plate thickness diameter 150mm, yield strength of 195MPa; 150mm (plate thickness diameter 200mm, yield strength 185MPa). Due to the moderate carbon content, the comprehensive performance is good, and the strength, plasticity and welding properties are well coordinated, and it is widely used.

In the national standard, the material similar to A36 is Q235.

ASTM 36 is the American Standard Carbon Structural Plate, which implements the standard ASTM A36 A36M-03A, which applies to riveted, bolted, and welded structures for bridges and construction, as well as carbon steel sections, plates, and rods of structural steel quality for general purpose.

c: , si, mn: , p, s: , cu when copper containing steel is specified).

Yield Strength: 250 .

Tensile strength: 400-550.

Elongation: 20.

Q235 ordinary carbon structural steel is also known as A3 plate. Ordinary carbon structural steel plate is a kind of steel material. Q represents the yield limit of this material, and the subsequent 235 refers to the yield value of this material, which is about 235MPa.

And with the increase of the thickness of the material and its yield value decreases, due to the moderate carbon content, good comprehensive performance, strength, plasticity and welding and other properties are better matched, the most widely used.

Elemental content. The sulfur content of A, B, C, and D decreased sequentially; A and B have the same phosphorus content, C has the next highest phosphorus content, and D has the least phosphorus content.

Chemical composition. Q235 is divided into four grades: A, B, C, D (GB T 700-2006), Q235A with C MN SI S P Q235B with C MN SI S P Q235C with C mn si s p Q235D with C mn si s P

A36 is a ship board with corrosion resistance can not be replaced casually ship board has nine major classification society certification, under normal circumstances, classification society can be replaced.

Corresponding to 10 steel, 16mn, and look at the medium, stainless steel can also be, but it is a little more expensive.

ASTM A333 A333M "Specification for Seamless Steel Pipe and Welded Steel Pipe for Low Temperature" is divided into 9 levels, namely Grade1, Grade3, Grade4, Grade6, Grade7, Grade8, Grade9, Grade10, and Grade6.

There are two main types of low-temperature steel: nickel-containing and nickel-free steel. A333 GR6 steel is a nickel-free steel that is a kind of aluminum deoxidized fine-grained low-temperature toughness steel. As a low-temperature steel, its composition must ensure sufficient fracture toughness to prevent brittle fracture when used at low temperatures.

Experiments show that the presence of impurities such as S, P, O, N, H has a very obvious effect on the toughness of the weld, so it is important to ensure that the weld contains the least amount of harmful magazines during the welding process. The welding performance of steel is good, and generally does not need to be preheated. A333GR6 cryogenic pipe, seamless steel pipe for cryogenic pipe.

Steel belongs to nickel-free steel, which is a kind of aluminum deoxidized fine-grained low-temperature toughness steel, therefore, it is also called aluminum calm steel, and W506Ni electrode and TIG-80NIL welding wire can be selected.

This is and a kind of manganese alloy steel.

In some factories in China, it is used: 16mn to replace. Also available: 20mn 25mn

This is an American brand of carbon structural steel or engineering steel, it will definitely not be a high-quality carbon structural steel, if it is manganese steel, the United States is marked with numbers, corresponding to how the domestic material is not bad, it is estimated to be a kind of Q215 or Q235.

The corresponding national standard is 16mn (carbon steel).

Basis: DL5031-94 Technical Specifications for Construction and Acceptance of Electric Power Construction (Pipelines) Table A4 is shown in Fig.

This is the American standard container board, and Wugang Chentao specializes in making plates. If you need it, you can check it out.

Steel belongs to nickel-free steel and is a kind of cryogenic tube.

The results show that the metallographic structure of GR6 is ferrite+pearlite, with uniform structure and grain size of 7 9 grades, which lays a good structural foundation for low temperature toughness.

Metallographic structure morphology of GR6 seamless steel pipe for low yield-to-strength ratio cryogenic pipes. This is shown in the figure below. Under the premise of not affecting the low-temperature impact toughness, the coarser the ferrite grain size, the lower the yield ratio.

Cryogenic tube precautions.

The packaging and protective coating of protective materials before leaving the factory in steel mills is an important measure to prevent the materials from rusting.

The principle of reasonable stacking and advanced stacking requires that different types of materials be stacked separately under the premise of stable and safe stacking to prevent confusion and mutual corrosion.

Cryogenic pipes are suitable for -45°C and 195°C cryogenic pressure vessel pipes and seamless steel pipes for cryogenic heat exchanger pipes. Galvanized iron-clad polyurethane insulation pipe is a kind of polyurethane insulation pipe. The outer protective pipe is made of galvanized iron sheet instead of the traditional high-density polyethylene outer protective pipe shell.

This kind of insulation pipe is more suitable for overhead use, with stronger aging resistance, ultraviolet resistance and waterproof performance.

Steel belongs to nickel-free steel, which is a kind of aluminum deoxidized fine-grained low-temperature toughness steel, therefore, it is also called aluminum calming steel.

A3 is a steel with an ordinary carbon structure.

It is also known as Q235 ordinary carbon structural steel. Q represents the yield limit of this material, and the subsequent 235 refers to the yield value of this material, which is about 235MPa. And with the increase of the thickness of the material and its yield value decreases, due to the moderate carbon content, the comprehensive performance is better, the strength, plasticity and welding and other properties are better matched, the most widely used.

Uses: 1. It is widely used in construction and engineering structures. It is used to make steel bars or build factory frames, high-voltage transmission towers, bridges, vehicles, boilers, containers, ships, etc., and is also widely used as mechanical parts that do not require high performance.

C and D grade steel can also be used as some professional steel.

2. It can be used for all kinds of mold handles and other unimportant mold parts.

3. Q235 steel is used as the punch material, which is used directly without tempering after quenching, and the hardness is 36-40HRC, which solves the phenomenon of punch fragmentation in use.

<> Class A steel. A3 is the old name, and the new grade is Q235-A. Its carbon content and strength are basically the same as those of the current No. 20 steel and Q235.

This type of steel is one of the most widely used materials. The mechanical strength of A3 can be guaranteed by the fingers, and the hardness is HRC40-44. However, its chemical composition is not very stable, and there are many impurities such as phosphorus and sulfur, so the general state of A3 is not suitable for heat treatment.

Since the carbon content of A3 is only on the left side of the sail and the right, it cannot be quenched directly, and it must be mixed with carbon first.

A333 is equivalent to 16MN cryogenic tube in China.

In addition to a certain amount of silicon or manganese basic elements, this type of steel also contains other elements suitable for China's resources. Trace elements such as vanadium (V), niobium (NB), titanium (Ti), aluminum (Al), molybdenum (Mo), nitrogen (N), and rare earth (Re).

According to the chemical composition and performance requirements, its grade is expressed by Q295A, B, Q345A, B, C, D, E, Q390A, B, C, D, E, Q420A, B, C, D, E, Q460C, D, E and other steel grades, and its meaning is the same as that of carbon structural steel.

Common materials for cryogenic tubes: Q345B, Q345C, Q345D, Q345E, A33GR6.