15CrMo, 20CrMo and 30CrMo steel plates are alloy steel plates, which contain 1.25%, 2% and 3% chromium and molybdenum, respectively, to improve the corrosion resistance and high temperature strength of the steel. These steel plates have good hardenability, tempering stability and corrosion resistance, and are suitable for the manufacture of mechanical parts that withstand high loads, high wear and corrosion resistance, such as crankshafts, gears, gas cylinders and pressure vessels.

15CrMo steel plate has good creep resistance and is suitable for working for a long time at high temperature, such as engine piston rings, gas cylinder pressure vessels, etc. 20CrMo steel plate has high hardness and strength after quenching and tempering, which is suitable for manufacturing high-strength and high-wear-resistant mechanical parts, such as crankshaft and connecting rod. 30CrMo steel plate has higher strength and toughness, suitable for the manufacture of high load, high wear resistance and impact of mechanical parts, such as large shafts, high-pressure vessels and so on.

In general, these steel plates are high-quality alloy steel plates suitable for a variety of mechanical parts manufacturing fields requiring high strength, high wear and corrosion resistance.

SN400 (A, B, C) and SN490 (B, C) plates are high strength medium carbon tempered steels that are commonly used to manufacture mechanical parts that withstand high loads. These steel plates have good hardenability, tempering stability and corrosion resistance.

SN400 series steel plate is divided into SN400A, SN400B and SN400C three levels, and SN490 series steel plate is divided into SN490B and SN490C two levels. These grades of steel plate differ in terms of chemical composition, mechanical properties and use.

In terms of chemical composition, SN400 series and SN490 series steel plates contain appropriate amounts of carbon, silicon, manganese and other elements to improve the strength and toughness of steel. At the same time, they also contain appropriate amounts of chromium, nickel and other alloying elements to improve the hardenability of steel, tempering stability and corrosion resistance.

In terms of mechanical properties, these steel plates have high strength and toughness, and can withstand large loads and shocks. Its tensile strength is generally above 800MPa, and the yield strength is about 550MPa. In addition, they also have good plasticity and welding properties, easy to process and connect.

In terms of use, SN400 series and SN490 series steel plates are widely used in the manufacture of various mechanical parts, such as shafts, connecting rods, crankshafts, gears, bolts and so on. They are often used in the manufacture of mechanical equipment requiring high strength, wear resistance and high load, such as automobiles, tractors, mining machinery and so on. In addition, these steel plates can also be used in the manufacture of structural parts in building structures, Bridges, ships and other fields.

In short, SN400 (A, B, C) and SN490 (B, C) steel plates are high strength medium carbon tempered steels with excellent properties, and have a wide range of application prospects in the field of machinery manufacturing and construction.

Q235GJ, Q345GJ is a kind of high-rise building steel, its grade is composed of Chinese Pinyin letter (Q) representing yield strength, specified minimum yield strength value, Chinese Pinyin letter (G) representing high-performance building structure steel, quality grade symbol (B, C, D, E).

Q235GJ and Q345GJ have high toughness, sufficient strength, good welding performance, certain yield ratio, tear resistance in the thickness direction, as well as shockproof and seismic resistance, good welding performance, no need to preheat before welding, no need to heat treatment after welding, easy construction, high labor efficiency building advantages, so mainly used in high-rise buildings. Such as large stadiums, large pavilions, exhibition centers, airports and other large buildings.

35CrMo, 20Cr and 40Cr steel plates are alloy steel plates, which have a wide range of applications in mechanical manufacturing and construction. The following is a detailed explanation of these steel plates:

35CrMo steel plate:
The carbon content is between 0.32% and 0.40%, with high strength and toughness.
Containing Cr, Mo and other alloying elements, with excellent hardenability, tempering stability and corrosion resistance.
It is commonly used in the manufacture of mechanical parts that withstand high loads and important wear resistance, such as shafts, connecting rods and gears.
20Cr steel plate:
The carbon content is between 0.17% and 0.24%, with good strength and toughness.
Compared with 40Cr, 20Cr has poor hardenability, but has better corrosion resistance and low temperature impact toughness.
It is commonly used to manufacture mechanical parts that require moderate strength and wear resistance, such as crankshafts, bolts and pistons.
40Cr steel plate:
The carbon content is between 0.37% and 0.44%, with high strength and toughness.
Containing Cr and other alloying elements, with excellent hardenability, tempering stability and corrosion resistance.
It is usually used to manufacture mechanical parts with high strength, wear resistance and high load, such as gears, shafts and connecting rods.

In general, these steel plates have their specific applications in different mechanical manufacturing fields due to their specific chemical composition and performance characteristics. Choosing the right steel plate is crucial to ensuring the reliability of mechanical parts and extending their service life.

30CrMnSiA and RQ65 steel plates are alloy steel plates with specific compositions and properties that are often used in the manufacture of important mechanical parts.

30CrMnSiA steel plate:

30CrMnSiA is A high-strength alloy steel plate containing chromium (Cr), manganese (Mn) and silicon (Si) elements, while adding a small amount of aluminum (A) element. This steel plate has excellent hardenability, tempering stability and corrosion resistance, and is suitable for manufacturing mechanical parts that bear high loads, high wear resistance and corrosion resistance, such as crankshaft, connecting rod, gear and so on. 30CrMnSiA steel plate is widely used in aviation, aerospace, automobiles, ships and other fields.

RQ65 steel plate:

RQ65 steel plate is a high-strength low-alloy steel plate with good hardenability, tempering stability and corrosion resistance. It is suitable for manufacturing mechanical parts that bear high loads and moderate impacts, such as shafts and roulette disks. The steel plate is often used in automobile, tractor, mining machinery and other industries.

In general, 30CrMnSiA and RQ65 steel plates are alloy steel plates with specific compositions and properties, which can meet the manufacturing needs of different mechanical parts. They are widely used in automobiles, tractors, mining machinery, ships, aerospace and other fields. These steel plates have high strength and toughness, can withstand high loads and impacts, and have good corrosion resistance, and can meet the requirements of use in a variety of complex environments.

25CrMo4, 34CrMo4 and 42CrMo4 steel plates are high-strength alloy steel plates with high hardenability, tempering stability and corrosion resistance, and are widely used in the machinery manufacturing industry.

25CrMo4 steel plate:

25CrMo4 steel plate is an alloy steel plate containing 2.5% chromium and 0.4% molybdenum, with good hardenability and corrosion resistance. It is suitable for the manufacture of mechanical parts that withstand high loads, high wear and corrosion resistance, such as crankshafts, connecting rods, gears, etc.

34CrMo4 steel plate:

34CrMo4 steel plate is an alloy steel plate containing 3.4% chromium and 0.4% molybdenum, which has high strength and toughness. It is suitable for manufacturing mechanical parts that bear high loads and moderate impacts, such as shafts and roulette disks. The steel plate also has good hardenability and corrosion resistance.

42CrMo4 steel plate:

42CrMo4 steel plate is an alloy steel plate containing 4.2% chromium and 0.4% molybdenum, which has very high strength and toughness. It is suitable for the manufacture of extremely high load, high wear and corrosion resistance of mechanical parts, such as large shafts, connecting rods, petrochemical equipment, etc. The steel plate also has good hardenability and corrosion resistance.

In general, 25CrMo4, 34CrMo4 and 42CrMo4 steel plates are high-quality high-strength alloy steel plates with high strength and toughness, which can meet the manufacturing needs of different mechanical parts. They are widely used in automobiles, tractors, mining machinery, ships, aerospace and other fields.

20Mn2 and 40Mn2 steel plates are high-quality carbon structural steel plates, mainly used in the machinery manufacturing industry.

20Mn2 steel plate:

20Mn2 steel plate is a high-strength low-carbon alloy steel plate with good hardenability, tempering stability and corrosion resistance. It is suitable for the manufacture of mechanical parts that withstand high loads, high wear and corrosion resistance, such as crankshafts, connecting rods, gears, etc. At the same time, 20Mn2 steel plate also has good weldability and processing performance, easy to cut, drilling, milling and other processing operations.

40Mn2 steel plate:

40Mn2 steel plate is a medium carbon alloy steel plate, with high strength and toughness, suitable for the manufacture of high load, medium impact mechanical parts, such as shafts, roulette and so on. The steel plate has good hardenability and is also suitable for the manufacture of parts requiring wear and corrosion resistance. 40Mn2 steel plate is often used in automobiles, tractors, mining machinery and other industries.

In general, 20Mn2 and 40Mn2 steel plates are high-quality carbon structural steel plates widely used in the machinery manufacturing industry, with high strength and toughness, and can meet the manufacturing needs of different mechanical parts.

20CrMnMo and 12Cr1MoV steel plates are high quality alloy steel plates used in the manufacture of mechanical parts. Their characteristics and uses are as follows:

20CrMnMo Steel plate:

20CrMnMo is a low-carbon alloy steel containing chromium (Cr), manganese (Mn) and molybdenum (Mo) elements. This steel plate has excellent hardenability, tempering stability and corrosion resistance, and is suitable for the manufacture of mechanical parts working in high temperature, high pressure and corrosive environments. Commonly used in the manufacture of engine crankshaft, connecting rod, gas cylinder pressure vessel and so on.

12Cr1MoV steel plate:

12Cr1MoV steel plate is a low-alloy high-strength steel plate containing chromium (Cr), molybdenum (Mo) and vanadium (V) elements. It has excellent hardenability, tempering stability and corrosion resistance, and is suitable for the manufacture of mechanical parts that withstand high loads, high wear and corrosion resistance. Commonly used in the manufacture of large shafts, high pressure vessels, petrochemical equipment and so on.

In general, 20CrMnMo and 12Cr1MoV steel plates are high-quality alloy steel plates with excellent mechanical properties and corrosion resistance, which are suitable for a variety of mechanical parts manufacturing fields requiring high strength, high wear and corrosion resistance.

ST37-2 and ST37-3 steel plates are German carbon structural steel material grades, ST37-2 steel plate implementation standard for DIN17100 standard, usually used in construction, underground engineering and other fields. ST37-2 steel plate is delivered in hot rolled, probe rolled or normalizing state, and its chemical composition includes carbon, silicon, manganese, sulfur, phosphorus and other elements.

ST37-3U steel plate is an improved carbon structural steel plate with higher strength and toughness, suitable for applications requiring higher stress and impact. ST37-3n steel plate is a surface treatment steel plate, which is coated with anti-corrosion coating to improve its corrosion resistance and extend its service life.

SS400 is a way of marking Japanese steel materials and is a judgment standard, equivalent to China's Q235 steel (also known as A3 steel). The tensile strength of SS400 steel plate reaches 400MPa, due to moderate carbon content, good comprehensive performance, strength, plasticity and welding properties are better matched, the most widely used. SS400 steel plate itself has high strength, high toughness, fatigue resistance, impact resistance, wear resistance, corrosion resistance, welding, easy to process and other steel plate comprehensive quality properties.

SM400A and SM400B steel plates are Japanese standard carbon structural steel plates, which are carbon structural steel plates for engineering structures and are also used in welding engineering.

The implementation standard of SM400A and SM400B steel plates is JISG3106.

SM400A, SM400B steel plate delivery status is hot rolled, if required, can be normalizing, quenching + tempering or tempering heat treatment, in addition according to the agreement between the supply and demand parties, can also be controlled rolling control cold and other heat treatment.

S235JR, S235JO, S235J2G3, S235J2G4 steel plates are carbon structural steel, their mechanical properties and chemical composition are different, as follows:

S235JR: Yield strength is 235MPa, tensile strength is 440-570 mpa, elongation is ≥21%, impact work is ≥47J. The carbon content is between 0.18-0.28%, and the phosphorus and sulfur content are less than 0.045%.
S235JO: Yield strength is 235MPa, tensile strength is 440-570MPa, elongation is ≥21%, impact work is ≥47J. The carbon content is between 0.18-0.28%, and the phosphorus and sulfur content are less than 0.045%.
S235J2G3: Yield strength is 235MPa, tensile strength is 490-620 Mpa, elongation is ≥21%, impact work is ≥47J. The carbon content is between 0.18-0.28%, and the phosphorus and sulfur content are less than 0.045%.
S235J2G4: The yield strength is 235MPa, the tensile strength is 490-620 Mpa, the elongation is ≥21%, and the impact work is ≥47J. The carbon content is between 0.18-0.28%, and the phosphorus and sulfur content are less than 0.045%.

In general, S235(JR,JO,J2G3,J2G4) steel plates have good mechanical properties and chemical composition.