People often use magnets to adsorb color steel plates, to verify their merits (Y ? u Li è) and authenticity, not to absorb non-magnetic, which is considered to be good, the goods are real; the attractors are magnetic, which is considered to be fake. The organic polymer of glass magnesium color steel plate has good colorability, formability, corrosion resistance, decoration, high strength and easy processing of steel plate, which can easily carry out stamping, cutting, bending, deep drawing and other processing. The rigidity of color steel plate is good: because the core material of rock wool and two layers of steel plate are bonded as a whole and work together, the overall rigidity of the steel plate is much better than that of the field composite plate with rock wool (fiberglass wool) on the roof panel. In fact, this is an extremely one-sided and impractical wrong way to distinguish.

　　彩钢板的 种类繁多，常温下按组织结构可分为几类：

　　There are many kinds of color steel plates, which can be divided into several types according to the structure at room temperature:

　　1．奥氏体型：如304、321、316、310等；

　　1. Austenite type: such as 304, 321, 316, 310, etc;

　　2．马氏体或铁素体(ferrite)型：如4

　　2. Martensite or ferrite type: such as 4

　　30、420、410等；

　　30, 420, 410, etc;

　　奥氏体型是无磁或弱磁性，马氏体或铁素体是有磁性的 。

　　Austenite is nonmagnetic or weakly magnetic, while martensite or ferrite is magnetic.

　　通常用作装饰管板的 彩钢板多数是奥氏体（Austenite）型的 304材质，一般来讲是无磁或弱磁的 ，但因冶炼造成化学成分波动或加工状态不同也可能出现磁性，但这不能认为是冒牌或不合格，这是什么原因呢？

　　Most of the color steel plates used as decorative tube sheets are austenitite Type 304 materials, which are generally non-magnetic or weak magnetic. However, due to the fluctuation of chemical composition or different processing conditions caused by smelting, magnetism may also occur, but this cannot be considered as fake or unqualified. What is the reason?

　　上面提到奥氏体是无磁或弱磁性，而马氏体或铁素体是带磁性的 ，由于冶炼(smelting)时成分偏析或热处理(chǔ lǐ)不当，会造成奥氏体彩钢板中少量马氏体或铁素体组织。这样，彩钢板中就会带有微弱的 磁性。

　　As mentioned above, austenite is non-magnetic or weakly magnetic, while martensite or ferrite is magnetic. Due to improper composition segregation or heat treatment (CH ǔ L ǐ) during smelting, a small amount of martensite or ferrite structure in austenitic color steel plate will be produced. In this way, there will be weak magnetism in the color steel plate.

　　另外，彩钢板经过冷加工，组织结构(Organizational Structure)也会向马氏体转化，冷加工变形度越大，马氏体转化越多，钢的 磁性也越大。如同一批号的 钢带，生产Φ76管，无明显磁感，生产Φ9。5管。因泠弯变形较大磁感就明显一些，生产方矩形管因变形量比圆管大，特别是折角部分，变形更激烈磁性更明显。

　　In addition, after cold working, the organizational structure of the color steel plate will also transform to martensite. The larger the cold working deformation, the more martensite transformation, the greater the magnetic properties of the steel. For the same batch of steel strip, Φ 76 pipe is produced, without obvious magnetic induction, Φ 9 is produced. 5 tubes. Because of the large bending deformation, the magnetic induction is more obvious. Because of the larger deformation, especially the angle part, the production square rectangular tube has more intense deformation and more obvious magnetism.

　　要想完全上述原因造成的 304钢的 磁性，可通过高温固溶处理开恢复稳定（解释:稳固安定；没有变动)奥氏体组织，从而消去磁性。洁净门板是将一种有机涂层涂敷于钢材表面，它具有外表美观、色彩艳丽、强度高、耐蚀性好、加工成型方便等优点，而且还可以使用户降低成本、减少污染。

　　In order to completely eliminate the magnetism of 304 steel caused by the above reasons, the austenite structure can be recovered and stabilized (explanation: stable and stable; no change) by high temperature solution treatment, so as to eliminate the magnetism. Clean door panel is a kind of organic coating applied on the steel surface, which has the advantages of beautiful appearance, bright color, high strength, good corrosion resistance, convenient processing and molding, and can also help users reduce costs and reduce pollution.

　　特别要提出的 是，因上面原因造成的 彩钢板的 磁性，与其他材料品质的 彩钢板，如430、碳钢的 磁性完全不是同一级别的 ，也就是说304钢的 磁性始终显示的 是弱磁性。

　　In particular, the magnetism of color steel plate caused by the above reasons is not the same level as that of color steel plate of other material quality, such as 430 and carbon steel, that is to say, the magnetism of 304 steel always shows weak magnetism.

　　这就告诉我们，如果彩钢板带弱磁性或完全不带磁性，应判别为304或316材料品质；如果与碳(C)钢的 磁性一样，显示出强磁性，因判别为不是304材质。

　　This tells us that if the color steel plate has weak magnetism or no magnetism at all, it should be judged as 304 or 316 material quality; if it has the same magnetism as carbon (c) steel, it shows strong magnetism, because it is not 304 material.