Ordinary steel plate, plus manganese steel plate factory number is not marked.

Color steel sandwich panel has various specifications: Width: 1200mm 1150mm 1000mm 950mm Thickness mm Length:

According to the project requirements and transportation conditions to determine the size of the color: according to the requirements of the project selection of Dongyang Wuning Tianhong color steel plate business department is specialized in the production of rock wool sandwich panels, EPS foam sandwich panels, C-shaped steel, Z-shaped steel, color steel tiles, lighting tiles, aluminum profiles, living containers, color plate activity houses, elegant activity houses and other products professional production and processing of the company, with a complete and scientific quality management system.

Manganese steel plate is a high-strength steel that is mainly used to withstand harsh working conditions such as impact, extrusion, and material wear. The most important feature is that under strong impact and extrusion conditions, the surface layer quickly undergoes work hardening, so that it still maintains good austenite toughness and plasticity in the core, and the hardened layer has good wear resistance. This is something that no other material can offer.

How to distinguish manganese steel plate and ordinary steel plate can be identified according to the following operations.

1. Listen to the sound when shearing the board, the sound of the fierce board is brittle, and the ordinary board has no movement 2. Use a grinder to polish the lower surface to see the sparks, and the sparks are more than the forks, which are the fierce boards 3.

4. Look at the spray label Each steel plate has a factory spray label.

5. Look at the sticky knife Sharp plate will fall off as soon as it is cut.

The land batch number is gone? Looks like this board is very rusty.

I feel that there are two ways.

1. Cut the sample for laboratory testing (troublesome).

2. Each board must have a corresponding warranty certificate, and the tonnage or size of the board corresponds to the warranty letter provided by the other party, so there is 80% certainty to determine the material of this board.

First, the reference is different.

1. Ordinary steel plate: a flat steel made by pouring molten steel and pressing after cooling.

2. Manganese plate: It is a low-alloy high-strength steel plate, that is, Q345 steel plate (formerly known as 16Mn).

Second, the welding performance is different.

1. Ordinary steel plate: due to the poor tempering stability, when carbon steel is quenched and tempered, a lower tempering temperature is required to ensure higher strength, so that the toughness of the steel is low; In order to ensure good toughness, the strength is low when the tempering temperature is high, so the comprehensive mechanical properties of carbon steel are not high.

2. Manganese plate: no need to preheat or slow cooling, but when the thickness is greater than 30, it needs to be preheated about 100-150 degrees, generally with J507 can be welded, if the toughness is better, it can also be recommended to use J507RH.

Third, the use is different.

1. Ordinary steel plates: oil drum plates, enamel plates, bulletproof plates, etc.; According to the surface coating, there are galvanized sheets, tinned sheets, lead-plated sheets, plastic composite steel plates, etc.

2. Manganese plate: metal structural parts, carburizing or cyanide parts with low core strength requirements, tie rods, connecting rods, hooks, couplers, bolts and nuts, sleeves, shafts and welded parts.

What is the difference between manganese plate and ordinary steel plate, manganese plate is higher than ordinary steel plate with manganese (Si), hardness is higher than ordinary steel plate, suitable for steel structure, price is also higher than ordinary steel plate, but the naked eye can not distinguish the difference between the two.

It is generally difficult to distinguish with the naked eye, and the colors are almost the same. Manganese plate and ordinary plate are not the same in yield strength and load resistance.

<1> Manganese steel: 65 manganese, manganese 18 chromium 2, manganese 13, manganese 16, manganese 13 chromium 2 and other high manganese steel plate series. <2> High-quality carbon steel:

50 manganese, 45 manganese, 40 manganese, 35 manganese, 30 manganese, 25 manganese, 20 manganese (20mn-50mn) 10 steel, 20 steel, 25 steel, 30 steel, 35 steel, 40 steel, 45 steel, 50 steel, 60 steel, 65 steel, 70 steel, 80 steel. <3> alloy steels: 27 silicon manganese, 20 chromium manganese titanium, 30 chromium manganese titanium, 20 chromium manganese silicon, 30 chromium manganese silicon, 20 chromium manganese molybdenum, 40 chromium manganese molybdenum, 15 chromium molybdenum, 20 chromium molybdenum, 25 chromium molybdenum, 30 chromium molybdenum, 40 chromium molybdenum, 40 chromium molybdenum, 60 silicon 2 manganese, 1 chromium 5 molybdenum, 12 chromium 1 molybdenum vanadium, 20 chromium, 30 chromium, 40 chromium mn simn, 35simn, 42simn, 40b, 45b, 50 mnb, 45mn

Manganese plate generally refers to low-alloy high-strength structural steel plate containing manganese, commonly used 16Mn (Q345) or 16Mn (Q345) grade, this material has higher mechanical strength than ordinary steel plate, and is also easier to weld, often used in the production of pressure vessels, etc.; Of course, ** is also more expensive than ordinary steel plates.

The manganese plate has a higher manganese (Si) content than the ordinary steel plate, and the hardness is also higher than that of the ordinary steel plate, which is suitable for steel structures, and the ** of the manganese plate is more expensive than that of the ordinary steel plate. If you want to purchase the most suitable and high-quality manganese plate, you can consider praising steel.

How to identify the difference between weathering steel plate and ordinary steel plate:

1. 1. The steel plate is not rusty stage, and the naked eye can not distinguish between the first weathering steel plate and the ordinary hot-rolled steel plate, 1. It is necessary to refer to the warranty of the steel mill, and the warranty letter requires the first merchant to provide the original of the red seal of the steel mill as far as possible, so as to avoid the merchant being inferior to the good. **The common materials of weathering steel are 09cupcrnia, B480gnqr, etc. of Baosteel or Anshan Iron and Steel, and the materials of ordinary hot-rolled steel plates are Q235B, SPHC, etc.

2. Provide a sample to a professional third-party testing agency to test whether the metal composition matches the warranty [this method can be used at any stage of rust].

Second, the first stage of steel plate rust (outdoor 1-3 months), ** weathering steel began to grow small rust points, the rust points of ordinary steel plates are relatively loose, and some of the rust treatment is poor and even rust peels;

3. In the second stage of long rust of the steel plate (4-8 months outdoors), the weather-resistant steel plate has less rust water, and the rust points are smaller and thicker; The rust water of ordinary steel plate is relatively large, and the rust point is large and thin; The rust column and tear stains of ordinary steel plates are more serious, and there are signs of blackening at the bottom of the workpiece;

Fourth, the third stage of long rust of the steel plate (more than 8 months outdoors), ** weathering steel has a clear dense rust core layer, and the rust points are tightly bonded into a protective layer, and the rust is almost not off when rubbed by hand; Ordinary steel plates have a lot of rust, and even the whole rust peels off and rusts wear. **Weathering steel is biased to reddish-brown, and ordinary steel plate is biased to dark black.

The grades in this standard are divided into six levels: NM300, NM360, NM400, NM450, NM500, NM550 and NM600, which can adapt to the needs of users.

4. Grade representation method.

In the technical conditions of high-strength wear-resistant steel products of existing enterprises, the naming of product grades is not standardized. Referring to the standard situation of foreign enterprises and combined with the actual situation of our country, in view of the fact that most of China's high-strength wear-resistant steel grades are imported grades, and the current use is relatively confusing, we should adopt the naming method of China's grades, unify them, promote the use of grades in general standards, promote the standardized development of high-strength wear-resistant steel in China, and realize the generalization and serialization of high-strength wear-resistant steel standards. According to the product characteristics of wear-resistant steel and the user's implementation of material selection, the wear-resistant steel grade adopts the combination of Chinese pinyin and Brinell hardness (HB) values.

For example, NM450, nm is the first letter of "wear-resistant" Chinese pinyin, and "450" is the Brinell hardness value.

5. Size, shape, weight and allowable deviation.

The size, shape, weight and allowable deviation of the steel plate comply with the provisions of GB T709-2006, and the four types of thickness deviation categories of the standard are available for users to choose.

In order to increase the flexibility of the standard, meet the requirements of users to the greatest extent, and reflect the principle of maximum freedom of the standard, this standard stipulates that the steel plate of other sizes and shape deviations can be agreed by both parties of supply and demand.

6. Smelting method.

This standard specifies the smelting method as converter or electric furnace smelting, and carries out LF furnace refining and VD or RH degassing treatment. The main purpose is to determine whether to use advanced production methods to achieve satisfactory products according to the specific needs of users.

7. Delivery status.

The characteristics of the product determine the delivery state of the product, in order to achieve the ideal comprehensive performance, a reasonable delivery state is crucial, wear-resistant steel can be through the scientific quenching and tempering process, to obtain good strength and toughness combination performance, but also to improve the hardness value of steel, to achieve the purpose of wear resistance. This standard stipulates the delivery status of hot rolling, controlled rolling, quenching + tempering according to the design of wear-resistant steel plate grades.

8 chemical composition.

The traditional wear-resistant steel used in construction machinery is generally high manganese steel, although high manganese steel has work hardening, but it has a strong hardening ability after being subjected to impact stress in the process of its use, so it can only play its role under large impact load, and the wear resistance of its hardness can not be improved for the working condition that the impact load is not large, and after the work hardening of high manganese steel, its yield strength is not high, and under the action of greater force, the workpiece sometimes cracks, and it is difficult to achieve the expected service life. Therefore, compared with high-manganese steel, in recent years, low-alloy wear-resistant steel is used to make small and medium-sized mechanical materials, and it is also used in the field of construction machinery, extending and expanding the use of high-manganese steel, which has been recognized by the machinery industry and has become a trend.