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The difference between precision steel pipe and seamless steel pipe:

1. The obvious difference from seamless steel pipes is that they have high dimensional accuracy, which can reach 0.05mm.

2. The surface finish of the inner and outer diameters of precision steel pipes is high, and customers can use them directly without processing; while ordinary seamless steel pipes require customers to lathe, polish, etc.

14CrMnMoVB

Material name: Alloy structural steel Brand: 14CrMnMoVB precision seamless steel pipe ●Precision seamless steel pipe characteristics and scope of application: The yield strength is 686MPa 

Grade weldable low-alloy high-strength steel with good comprehensive mechanical properties. After different heat treatments, different comprehensive mechanical properties can be obtained to suit different working conditions. Its corrosion resistance is higher than mild steel (about three times). It is suitable for manufacturing various types of pressure vessels and parts such as engineering mining machinery and truck trucks.

●Chemical composition of precision seamless steel pipe:

Carbon C: 0.10～0.15 silicon Si: 0.17～0.37 manganese Mn: 1.10～1.60 sulfur S: ≤0.035 phosphorus P: ≤0.035 chromium 

Cr: 0.90～1.30 vanadium V: 0.03～0.06 molybdenum Mo: 0.32～0.40 boron B: 0.002～0.006

●Mechanical properties of precision seamless steel pipe:

Tensile strength σb (MPa): 868 Conditional yield strength σ0.2 (MPa): 713 Elongation δ5 (%): 17 Elongation δ10 (%): 11 Reduction of area ψ 

(%): 62 Impact toughness value αku (J/cm2): 5 Sample size: a certain sample

●Heat treatment specifications and metallographic structure of precision seamless steel pipe: Heat treatment specifications: normalizing at 900℃ and tempering at 600℃. Metallographic structure: tempered bainite + a small amount of tempered sorbite.
High precision cold drawn tube http://m.cbtea.cn