AISI 4130 4140 Cold Rolled Round Hollow High Precision Metal Iron Pipes
4140 cold-rolled steel pipe (or tubing) is made from the high-strength, low-alloy steel grade 4140, known for its excellent strength, toughness, and wear resistance.
Chemical Composition (similar to plate/bar)
Carbon (C): 0.38–0.43%
Manganese (Mn): 0.75–1.00%
Chromium (Cr): 0.80–1.10%
Molybdenum (Mo): 0.15–0.25%
Silicon (Si): 0.15–0.30%
Sulfur (S) & Phosphorus (P): ≤0.040%
Cold-Rolled 4140 Pipe:
Smoother surface finish
Tighter dimensional tolerances
Higher strength due to work hardening
Common Applications
Hydraulic cylinders & pistons
High-pressure tubing (oil & gas, automotive)
Drill collars & tool joints
Machinery shafts & structural components
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Produnt Specification
StandardGB ASTM DIN
Grade10#,15#,20#,20Cr,40Cr,20CrMo,35CrMo
Delivery Time22-30 days
Tolerance±5%
Brand NameZhongLian
ApplicationFluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, OIL PIPE, Chemical Fertilizer Pipe
Special PipeAPI Pipe, EMT Pipe, Thick Wall Pipe, Other
Thickness0.25-75mm
Length12M, 6m, 6.4M
CertificateAPI, ce, rohs, BIS, ISO9001
Product nameSeamless Steel Pipe
Wall Thickness4-130mm.0.25-30mm
SurfaceCustomers't Requirement
MaterialQ235/Q235B/Q345/Q345B/Q195/St37/St42/St37-2/St35.4/St52.4/St35
SampleSample Freely
Payment termsL/C T/T (30%DEPOSIT)
PackingStandard Seaworthy Packing


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Company Profile

Shandong Zhonglian Yongsheng Special Steel Co., Ltd. is a steel production enterprise that has been engaged in steel production, processing and sales for many years. Its main products include stainless steel series, carbon steel, galvanized steel and other profile products. It can also provide other metal products according to customer needs, with an annual export volume of about 1 million tons. It has five finishing production lines, three hot-dip galvanizing production lines, and two color coating production lines. It adopts advanced automatic width control system (AWC), automatic thickness control system (AGC), bending roll system, work roll guide roll system and other effective measures to ensure product quality. Its products are exported to more than 30 countries and regions including the United States, Canada, Spain, Russia, Iran, Saudi Arabia, Morocco, India, Pakistan, Malaysia, Singapore, Australia, New Zealand, etc. "Punctuality, integrity, and humanized service" have always been the development principles that the company and all employees have always adhered to.

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Certificate

  • 微信图片_2025-07-25_175515_396
  • 微信图片_2025-07-25_175510_390
  • 微信图片_2025-07-25_175519_269
  • 微信图片_2025-07-25_175522_605
  • 微信图片_2025-07-25_175448_750

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