Carbon steel and alloy steel have different critical deformation scales due to their different composition and properties. Generally, carbon steel has a lower critical deformation scale than alloy steel. Generally, the critical deformation scale of carbon steel ranges from 0.2% to 0.6%, while the critical deformation scale of alloy steel ranges from 0.3% to 0.8%. For example, the critical deformation scale of carbon structural steel is 0.2%, while that of low-alloy structural steel is 0.3%. However, due to their different chemical compositions and if they contain special alloying elements, their critical deformation scale may be different.
Carbon structural steel is an important variety of steel. Its chemical composition has no C and Si beyond the limit. That is to say, the content of C and Si has very little effect on the physical and chemical properties of carbon structural steel. It mainly consists of C, Mn,N and small amount of (p,s, etc.). The deformation resistance of carbon structural steel is low, and the critical deformation scale is low. In general, the critical deformation scale of carbon structural steel ranges from 0.2% to 0.3%.
Alloy structural steel is one of the most important varieties of steel. With the addition of various alloying elements, the chemical composition of alloy structural steel has changed. With its special chemical composition, the performance of alloy structural steel has changed greatly. Especially after adding elements such as Cr, V, Ti and so on, alloy structural steel has excellent hardenability, and its deformation resistance has also improved, so its critical deformation scale has slightly increased. Generally speaking, the critical deformation scale of alloy structural steel ranges from 0.3% to 0.8%.
The critical deformation scale of carbon steel and alloy steel is not only affected by the carbon content, but also by the chemical composition of the steel and the shape of the material. Generally, the critical deformation scale of steel plate is lower than that of round steel, and the critical deformation scale of steel plate is also lower than that of steel bar.
In order to accurately determine the critical deformation scale of carbon steel and alloy steel, we usually need to carry out appropriate tests in the laboratory to obtain the actual data. The critical deformation scale of steel will directly affect the bearing capacity and safety of the structure, so when using carbon steel and alloy steel materials, it is necessary to choose appropriate steel grades, and then carry out appropriate tests and calculations to analyze the deformation resistance of the structural members, so as to ensure the design quality and safe use of the structure.
In conclusion, the critical deformation scales of carbon steel and alloy steel can vary greatly depending on their different compositions. Generally, the critical deformation scale of carbon structural steel ranges from 0.2% to 0.6%, while the critical deformation scale of alloy structural steel ranges from 0.3% to 0.8%. As the chemical composition and shape of the material can affect the critical deformation scales, it is necessary to carry out appropriate tests and calculations before using these materials in the structure to ensure the proper deformation resistance of the members and the design quality and the safe use of the structure.
在碳素结构钢和合金结构钢中，由于其不同的组成和性能，其临界变形范围也不同。一般而言，碳钢的临界变形范围比合金钢低。一般来说，碳结构钢的临界变形范围介于0.2％至0.6％之间，而合金结构钢的临界变形范围介于0.3％至0.8％之间。例如，碳结构钢的临界变形范围为0.2％，而低合金结构钢的临界变形范围为0.3％。但是，由于它们不同的化学组成，如果它们含有特殊的合金元素，它们的临界变形范围可能也不尽相同。
碳结构钢是一种重要的钢种。其化学成分没有超出限度的C和Si。也就是说，C和Si的含量对碳结构钢的物理化学性质影响不大。它主要由C、Mn、N和少量（P、S等）组成。碳结构钢的变形阻力较低，其临界变形范围较低。一般来说，碳结构钢的临界变形范围介于0.2％至0.3％之间。
合金结构钢是最重要的钢种之一。随着各种合金元素的添加，合金结构钢的化学成分发生了变化。由于其特殊的化学组成，合金结构钢的性能也发生了巨大的变化。尤其是在加入Cr、V、Ti等元素后，合金结构钢具有极好的硬化性，其变形阻力也得到了提高，因此其临界变形范围略有升高。一般来说，合金结构钢的临界变形范围介于0.3％至0.8％之间。
碳钢和合金钢的临界变形范围不仅受到碳含量的影响，也受到钢的化学成分和材料形状的影响。一般来说，钢板的临界变形范围要低于圆钢，钢板的临界变形范围也低于钢棒。
为了准确确定碳钢和合金钢的临界变形范围，我们通常需要在实验室中进行适当的测试，以获得实际数据。钢材的临界变形范围直接影响结构的承载能力和安全性，所以在使用碳钢和合金钢材
