- 材质:
- 合金结构钢管
- 规格:
- 常规齐全
- 品牌:
- 国产进口
Chinese name r Category alloy pipe is a kind of material used to make steel structural parts in boilers. The use temperature reaches ℃
This kind of steel is mostly rolled and forged into round square flat profiles and seamless steel pipes, which are mostly used to make This high-quality alloy structural steel has excellent comprehensive mechanical properties for the more important and larger-sized parts of mechanical products and high-pressure pipeline containers.
Chemical composition
Material
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① Starting with steel number The two-digit number indicates the carbon content of the steel, expressed in ten thousandths of the average carbon content, such as r.
②The main alloying elements in steel, except for a few microalloying elements, are generally expressed in percentages. When the average alloy content is used, the steel number is generally marked with the element symbol instead of the content. However, in special circumstances that may cause confusion, the element symbol can also be marked with a number. For example, the steel number and the chromium content of the former are , the latter is, and all other ingredients are the same. When the average content of alloy elements is used, the content should be indicated after the element symbol, which can be expressed as etc. For example r.
③Vanadium, titanium, aluminum, boron, B, rare earths, R and other alloying elements in steel are all micro-alloying elements. Although the content is very low, they should still be marked in the steel grade. For example, in B steel. Vanadium is, boron is.
④High-grade high-quality steel should be added at the end of the steel number to distinguish it from general high-quality steel.
⑤Special-purpose alloy structural steel, the steel number is preceded or suffixed by a symbol representing the purpose of the steel type. For example, r steel is specially used for rivet screws, and the steel number is expressed as r.
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