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The difference between precision seamless steel pipe and cold drawn seamless steel pipe
1. The difference between precision seamless steel pipe and seamless steel pipe:
1. The main feature of seamless steel pipe is that it has no welding seams and can withstand greater pressure. Products can be very rough as cast or cold drawn parts.
2. Precision seamless steel pipe is a product that has appeared in recent years, mainly because the inner hole and outer wall dimensions have strict tolerances and roughness.
2. Characteristics of precision seamless steel pipe:
1. Smaller outer diameter.
2. High precision and can be used for small batch production.
3. The cold-drawn finished product has high precision and good surface quality.
4. The cross-sectional area of ??the steel pipe is more complex.
5. The performance of steel pipe is superior and the metal is denser.
3. Purpose:
Used in mechanical structures, hydraulic equipment, auto parts, etc.
4. Main features of precision seamless steel pipe: The inner and outer walls of the steel pipe have high precision and high smoothness. After heat treatment, the steel pipe has no oxidation layer and the inner wall has high cleanliness. The steel pipe can withstand high pressure, does not deform during cold bending, has no cracks in flaring and flattening, and can be subjected to various complex deformations and mechanical processing. Steel pipe color: white with bright color, high metallic luster.
5. What is the difference between precision seamless steel pipe and cold drawn seamless steel pipe?
Precision seamless steel pipes are made by the cold rolling process of precision cold-rolled pipe machines, while cold-drawn seamless steel pipes are made by cold-drawing methods. Generally speaking, the accuracy, smoothness and size of cold-rolled pipes are much better than cold-drawn pipes, so they are called: precision seamless steel pipes. Precision seamless steel pipes are used in automobiles. , hydraulic parts, machining, mechanical parts and other users who have high requirements for the precision and finish of steel pipes. Because precision seamless steel pipes have high precision, no oxidation, small dimensional tolerances, and good finish, many mechanical processing users choose precision seamless steel pipes in order to save labor, materials, and time.
6. The differences between precision steel pipes and seamless steel pipes
1. The main feature of seamless steel pipe is that it has no welding seams and can withstand greater pressure. Products can be very rough as cast or cold drawn parts.
1. The main feature of seamless steel pipe is that it has no welding seams and can withstand greater pressure. Products can be very rough as cast or cold drawn parts.
2. Precision steel pipes are products that have appeared in recent years. The main dimensions of the inner hole and outer wall have strict tolerances and roughness.
7. Characteristics of precision steel pipes:
1. Smaller outer diameter.
2. High precision and can be used for small batch production.
3. The cold-drawn finished product has high precision and good surface quality.
4. The cross-sectional area of ??the steel pipe is more complex.
5. Steel pipes have superior performance and relatively dense metal. They are often used to manufacture mechanical structures, hydraulic accessories, auto parts, etc.
8. Precision steel pipe weight calculation formula:
Precision steel pipe weight calculation formula: [(outer diameter-wall thickness)*wall thickness]*0.02466=kg/meter (weight per meter)
Commonly used materials and chemical compositions of precision bright tubes:
10# 0.07~0.13 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035
20# 0.17~0.23 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035
35# 0.32~0.39 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035
45# 0.42~0.50 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035
40cr 0.37~0.44 0.17~0.37 0.50~0.80 ≤0.035 ≤0.035 0.08~1.10
25Mn 0.22~0.2 0.17~0.37 0.70~1.00 ≤0.035 ≤0.035 ≤0.25
37Mn5 0.30~0.39 0.15~0.30 1.20~1.50 ≤0.015 ≤0.020
Standards, materials and delivery status of precision bright tubes
Main standards: GB/T3639, DIN2391-94/C, DIN2445, EN10305, DIN1630, DIN1629, ASTM A106, ASTM A179, JIS G3445
Main materials: 10#, 20#, 35, 45, 40Cr, 25Mn.37Mn5, St35(E235), St37.4, St45(E255), St52(E355)
Main materials: 10#, 20#, 35, 45, 40Cr, 25Mn.37Mn5, St35(E235), St37.4, St45(E255), St52(E355)
Main delivery status: NBK(+N), GBK(+A), BK(+C), BKW(+LC), BKS(+SR)
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