20# Seamless Precision Pipe
20# precision steel pipe
20# precision steel pipe is a high-precision steel pipe material processed by cold drawing or hot rolling. Since the 20# precision carbon steel pipe has no oxide layer on the inner and outer walls, can withstand high pressure without leakage, has high precision, high smoothness, no deformation in cold bending, no cracks in flaring and flattening, etc., it is mainly used to produce products for pneumatic or hydraulic components. Such as cylinders or oil cylinders, which can be seamless pipes or welded pipes. The chemical composition of precision steel pipes is carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.
The main material of 20#Precision bright seamless steel pipe is seamless steel pipe, which is made by cold drawing or cold rolling process. Its internal and external surfaces are smooth, with high dimensional accuracy and uniform wall thickness, which can meet various precision processing needs. At the same time, 20# High precision seamless steel pipe has a uniform chemical composition, good mechanical properties, and can withstand greater pressure and impact.
20#Cold drawn precision seamless steel pipe is often used to manufacture high-precision instrument equipment and mechanical parts. Due to its high dimensional accuracy and smooth surface, it can ensure the stability and accuracy of the equipment. For example, in the automotive manufacturing industry, 20#Seamless Precision Pipe is often used to manufacture engine and chassis components to improve vehicle performance and reliability.
Mechanical Properties of 20 # Seamless Steel Pipe
|
Grade |
delivery status | |||||
| Cold working/hard(Y) | Cold working/soft(R) | Stress Relief Annealing (T) | ||||
| Tensile strength (MPa) | Elongation(%) | Tensile strength (MPa) | Elongation(%) | Tensile strength (MPa) | Elongation(%) | |
|
≥ |
||||||
|
10# |
412 |
6 |
373 |
10 |
333 |
12 |
|
20# |
510 |
5 |
451 |
8 |
432 |
10 |
High precision seamless steel pipe
According to the different performance requirements of 20# precision steel pipe and its different tempering temperatures, tempering can be divided into the following types:
(1) Low temperature tempering (150-250 degrees)
The structure obtained by low temperature tempering is tempered martensite. The purpose is to reduce the quenching internal stress and brittleness of the quenched 20# precision steel pipe while maintaining its high hardness and high wear resistance to avoid cracking or premature damage during use. It is mainly used for various high-carbon cutting tools, measuring tools, cold stamping dies, rolling bearings and carburized parts, etc. The hardness after tempering is generally HRC58-64.
(2) Medium temperature tempering (250-500 degrees)
The structure obtained by tempering at medium temperature is tempered troostite. The purpose is to obtain high yield strength, elastic limit and high toughness of 20# precision steel pipe. Therefore, it is mainly used for the treatment of various springs and hot work molds. The hardness after tempering is generally HRC35-50.
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